1. Barracuda Web Filter

1. Barracuda Web Filter
1. Barracuda Web Filter - Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.1 Release Notes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.2 Deployment Options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.2.1 Inline Pass-Through (Transparent) Mode Deployment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.2.2 Forward Proxy Deployment of the Barracuda Web Filter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.2.3 High Availability - Clustering the Barracuda Web Filter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.2.4 Inline Pass-through With Pre-existing Proxy Deployment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.2.5 Connecting Inline to your Network with a Pre-existing Proxy Server . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.2.6 Deploying the Barracuda Web Filter with a Peer Proxy . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.2.7 Source-Based Routing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.2.8 Dual Bridge Deployment 7.0 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.2.9 VLAN Deployments . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.2.10 Virtual Deployment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.2.10.1 Hypervisor Compatibility and Deployment - OVF Package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.2.10.2 Hypervisor Compatibility and Deployment - VMX Package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.2.10.3 Hypervisor Compatibility and Deployment - XVA Package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.2.10.4 Hypervisor Compatibility and Deployment - VHD Package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.2.10.5 Barracuda Web Filter Vx Quick Start Guide . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.2.10.6 Backing Up Your Virtual Machine System State . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.2.10.7 Directing Traffic to the Barracuda Web Filter Vx . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.2.10.8 Sizing CPU, RAM and Disk for Your Barracuda Web Filter Vx . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.2.11 WCCP Deployment 6.x . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.2.12 WCCP Deployment 5.x . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.2.13 Proxying Web Traffic Using a PAC File . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.3 Getting Started . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.3.1 Step 1: Network Considerations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.3.1.1 Using Static Routes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.3.2 Step 2: Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.3.3 Step 3: Configure the Barracuda Web Filter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.3.4 Step 4: Configure and Secure the Web Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.3.5 Step 5: Connect the Barracuda Web Filter to Your Network . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.3.6 Barracuda Web Filter 30 Day Evaluation Guide . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.4 Managing Policies . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.4.1 Best Practices in Configuring Policy . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.4.2 Web and Desktop Application Control With the Barracuda Web Filter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.4.3 BLOCK/ACCEPT Order of Precedence - Barracuda Web Filter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.4.4 Block Messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.4.5 Creating Block and Accept Policies . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.4.5.1 Application Filtering for Non Web Based Applications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.4.6 Using Custom Categories . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.4.7 Exception Policies 6.x . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.4.8 Exception Policies 7.x . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.4.9 Barracuda Web Filter for Education . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.4.10 How to Set Up YouTube for Schools . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.4.11 How to Enable Safe Search for Students 7.1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.4.12 How to Enable Safe Search for Students 6.x . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.4.13 Suspicious Keyword Tracking . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.4.14 Temporary Access for Education . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.4.15 How to Use Temporary Access for Students - Teacher's Guide . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.4.16 How to Configure Web Application Monitoring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.4.17 Using SSL Inspection With the Barracuda Web Filter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.4.17.1 How to Configure SSL Inspection 7.1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.4.17.2 How to Configure SSL Inspection 7.0 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.4.17.3 How to Configure SSL Inspection for Google Chrome Browser . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.4.17.4 How to Configure SSL Inspection 6.x . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.4.17.5 How to Create and Install a Self-Signed Certificate for SSL Inspection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.4.17.6 How to Use the Barracuda Default Certificate for SSL Inspection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.4.18 Google Apps Control Over HTTPS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.4.19 Facebook Control Over HTTPS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.4.20 YouTube Control Over HTTPS 7.x . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.4.21 Captive Portal Terms and Conditions Page . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
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1.4.22 Creating Block and Accept Policies - with Safe Search info . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.4.23 Data Pattern Categorization and the Barracuda Web Filter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.5 Managing Users and Groups . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.5.1 Creating Users and Groups . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.5.2 How to Choose Your Authentication Mechanisms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.5.2.1 How to Configure Kerberos Authentication . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.5.2.2 How to Enable LDAP Domain User Authentication . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.5.2.3 How to Enable NTLM Domain User Authentication . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.5.3 How to Integrate the Barracuda Web Filter With a User Authentication Service . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.5.4 How to Configure Proxy Authentication for Chromebooks and Other Remote Users . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.5.5 About the Barracuda DC Agent . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.5.5.1 How to Get and Configure the Barracuda DC Agent . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.5.5.2 Using the Barracuda DC Agent With Microsoft Network Policy Server . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.5.6 Role-based Administration 7.x . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.5.7 Role-based Administration 6.x . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.5.8 Wireless Access Point Integration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.6 Filtering Traffic for Offsite and Mobile Users . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.6.1 Barracuda Web Security Agent - How it Works 7.1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.6.2 How to Install the Barracuda WSA With the Barracuda Web Filter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.6.2.1 GPO Installation of Barracuda WSA from the Windows Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.6.2.2 GPO Installation of the Barracuda WSA With Microsoft SBS 2008 Server . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.6.2.3 Installation using a Windows GPO from the Command Line . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.6.2.4 Installing the Barracuda WSA on a Macintosh . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.6.2.5 Manual local Installation from the Command Line . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.6.2.6 Uninstalling the Barracuda Web Security Agent for Win2K3 Server . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.6.2.7 Uninstalling the Barracuda Web Security Agent for Win2K8 Server . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.6.3 How to Configure the Barracuda WSA With the Barracuda Web Filter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.6.4 Release Notes - Barracuda Web Security Agent for Macintosh . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.6.5 Release Notes - Barracuda Web Security Agent for Windows . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.6.6 Barracuda Web Security Agent - How it Works 6.x . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.6.7 Barracuda Safe Browser Setup Guide - With Barracuda Web Filter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.6.8 How to Enforce Proxy Settings On a Chromebook Using Google Apps . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.7 Advanced Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.8 Monitoring the System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.8.1 Basic Monitoring Tools . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.8.1.1 Audit Log of Configuration Changes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.8.2 Reporting 6.x . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.8.3 Reporting 7.x . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.8.4 Report mapping 6.0.1 to 7.x . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.8.5 How to Set Up Alerts and SNMP Monitoring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.8.5.1 Barracuda Reference MIB . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.8.5.2 Barracuda Web Filter SNMP MIB . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.8.6 How to Set Up Barracuda Cloud Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.8.7 Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.8.8 Syslog and the Barracuda Web Filter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.9 Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.9.1 How to Back Up and Restore Your System Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.10 Web Use Categories . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.11 About the Barracuda Web Filter Hardware . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.11.1 Hardware Compliance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.12 Limited Warranty and License . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2. How to Use the Barracuda Malware Removal Tool . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
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Barracuda Web Filter - Overview
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The Barracuda Web Filter is an integrated content filtering, application blocking and malware protection solution that is powerful, easy to use and
affordable for businesses and educational institutions of all sizes. It enforces Internet usage policies on and off network by blocking access to
websites and Internet applications that are not related to business or education, and it easily and completely eliminates spyware and other forms
of malware from your organization.
Where to Start
If you have the Barracuda Web Filter Vx virtual machine, start here:
Barracuda Web Filter Vx Virtual Deployment
The 30 Day Evaluation Process – A roadmap for your product evaluation (optional)
Managing Policies – Best practices, precedence of block/accept policies, authentication schemes
If you have the Barracuda Web Filter appliance, start here:
Getting Started
The 30 Day Evaluation Process – A roadmap for your product evaluation (optional).
Managing Policies – Best practices, precedence of block/accept policies, authentication schemes.
Key Features
Content filtering, with HTTP/HTTPS support and URL filtering by category for various types of users and groups. Simplifies CIPA
compliance for schools.
Comprehensive network threat protection.
SSL Inspection of HTTPS traffic with the model 410 and higher, running version 7.1.0 and higher. See Using SSL Inspection With the
Barracuda Web Filter for system requirements.
LDAP integration, Single Sign-on user authentication – See How to Choose Your Authentication Mechanisms.
Safe Browsing for Schools and Remote Users
Barracuda Web Filter for Education – A suite of features to regulate use of social media applications, alerts on cyberbullying and provide
safe browsing and content delivery for the classroom
Filtering Traffic for Offsite and Mobile Users – A policy enforcement solution for BYOD, campus-issued laptops and iOS devices
Granular Policy Control and Social Media Monitoring
HTTPS-based Policy – Create policy exceptions specific to HTTP traffic, HTTPS, or another legitimate URI scheme including SSL
Inspection.
Social Media monitoring – Control and archiving of web-based application traffic and/or content, regulating use of Google Apps,
Facebook, YouTube and other web 2.0 applications. See Web and Desktop Application Control With the Barracuda Web Filter and How
to Configure Web Application Monitoring for details.
Release Notes
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Please Read Before Upgrading
CAUTION: Do NOT upgrade to this version of the 7.x release if you use one of your Barracuda Web Filters as a reporting unit that
receives syslog output from other Barracuda Web Filters.
Important: Make a Backup First
Before installing any firmware version, back up your configuration and read all release notes that apply to versions more recent than the
one currently running on your system. Important: A configuration backup made in version 4.4 and lower cannot be restored to version
4.5 and higher.
Do not manually reboot your system at any time during an upgrade, unless otherwise instructed by Barracuda Networks Technical
3
Support. The upgrade process typically takes only a few minutes after the upgrade is applied. If the process takes longer, please
contact Technical Support for further assistance.
Upgrading to Version 6.x and 7.x
After upgrading to version 6.0, reverting back to the previous firmware version or to the factory installed version is not possible.
Note that the BASIC > WebLog and BASIC > Application Log pages get cleared on updating from 6.0.0 to 6.0.1, but the log data is still
intact and will still appear in reports.
WARNING: If you are currently using port 8080 as a proxy port for your client connections, note that this port is no longer available to use
for proxy connections with version 7.0 and higher. Please alter the port to 3128 on your clients by modifying your GPO or PAC file.
Upgrading to Version 8.0
After upgrading to version 8.0, you'll notice that some Hourly/Daily reports on the BASIC > Status (dashboard) page will initially show No
Data Available until the first web request is made after the upgrade. All of the data required to run reports still exists on the Barracuda Web
Filter and new data will begin to appear on the default dashboard as the Barracuda Web Filter begins to process traffic after the upgrade.
Firmware Version 8.0
What's New in Version 8.0
Authentication
Proxy Authentication - The Proxy Authentication feature has been expanded to allow selection of LDAP groups for proxy
authentication. Previously, only local users were supported. In 8.0, Administrators can apply LDAP authentication to remote/mobile
users who are in the LDAP server, but are browsing outside of the network. This means that the Barracuda Web Filter can be configured
such that there are no unauthenticated users. See the USERS/GROUPS > Configuration page to configure.
Wireless Access Point (WAP) Support - The WAP integration feature enables end users to surf as authenticated users via the
Barracuda Web Filter after authenticating against their WAP. This means that the user only needs to enter their credentials once as
opposed to entering their credentials once for the WAP and then a second time to authenticate against the Barracuda Web Filter. Each
WAP can be configured to send its syslogs to the Barracuda Web Filter on the network, which can then parse the logs for username and
IP address of each authenticated user. This enables reporting on user browsing activity, bandwidth use, and more. See the USERS/GRO
UPS > Configuration page to configure.
User Interface
Data Pattern Categorization - As data leaves the corporate network through a variety of web based applications, the network
administrator can monitor data patterns for sensitive information to ensure compliance with corporate policies. This entails the monitoring
and alerting of flagged specific data elements such as credit card numbers, social security numbers, privacy terms, and HIPAA
compliance terms. See the BLOCK/ACCEPT > Web App Monitor page to configure.
Customizable Dashboards - In addition to the wealth of information available on the default dashboard (BASIC > Status page), the
administrator can now also create multiple dashboards with summaries of just the information about web traffic and user activity that is of
top priority. Choose from various reports showing specific user browsing, bandwidth and malware statistics in drag and drop layouts.
Virtualization
Support for Microsoft Hyper-V - See Hypervisor Compatibility and Deployment - VHD Package.
Fixed in Version 8.0
YouTube Safety Search works to match Google's new implementation of enforced Safety Mode as of March 2014. [BNYF-8537]
Log reports now show data in ascending order by date. [BNYF-8530]
Limiting reports to All Logged Users no longer generates reports with No Data Available message. [BNYF-8458]
Reports can now be generated that include users found in nested organizational units (OU's) in the Active Directory structure.
[BNYF-8379]
Application Exceptions can now be set for specific IP groups. For example, FTP traffic can now be blocked based on the IP group of a
particular user or set of users. [BNYF-8519]
Temporary Access administrators can now log in to bypass block pages using their LDAP credentials even if the LDAP group they belong
to is named with upper case letters. Previously, LDAP group names had to be in lower case. [BNYF-8504]
Port 22 is no longer open for SSH access on the Barracuda Web Filter. [BNYF-8175]
Firmware Version 7.1.0
4
What's New in Version 7.1.0
SSL Inspection
The Barracuda Web Filter 610 and 810 now support inline SSL Inspection. In previous releases, SSL Inspection was supported only in
forward proxy deployments. Moreover, applications selected on the BLOCK/ACCEPT > Web App Control and Web App Monitor page
s are now subject to SSL Inspection when the feature is enabled. See How to Configure SSL Inspection 7.1 for details. See the ADVANC
ED > SSL Inspection page in the Barracuda Web Filter web interface to configure.
The Barracuda Web Filter 910, 1010, and 1011 now SSL inspects applications selected on the BLOCK/ACCEPT > Web App Control an
d BLOCK/ACCEPT > Web App Monitor pages. Previously, only domains and categories (in forward proxy) specified on the ADVANCE
D > SSL Inspection page were subject to SSL Inspection.
The Barracuda Web Filter 410 now supports SSL Inspection with inline or forward proxy deployments for Safe Browsing and YouTube
for Schools.
The Barracuda Web Security Agent (WSA) supports SSL Inspection in non-Policy Lookup Only Mode, to inspect the traffic proxied by
the agent. See Barracuda Web Security Agent - How it Works 7.1.
Fixed in Version 7.1.0
RAID status tools provide correct and consistent RAID status on the BASIC > Status page. [BNYF-8186]
When a delegated admin is limited to a group, and that admin runs a report, the filter for Limit Access To (defined on the ADVANCED >
Delegated Admin page) is correctly applied. [BNYF-7335]
The process of exporting to a CSV file from the BASIC > Web Log page does not time out if the export takes more than 5 minutes.
[BNYF-8178]
The Manage and Monitor roles as defined on the ADVANCED > Delegated Admin page can create scheduled reports. [BNYF-8288]
Backups created on older firmware versions will not work on the 7.1.0 release. The retrieval and backup works as expected as long as
the backup files have been created with 7.1.0 release. [BNYF-8127]
Version 7.1.0.003
Synchronized help page in web interface for ADVANCED > Temporary Access page. [BNYF-8425]
Logging into the web interface with admin credentials, or getting redirected to a block page in a maximized IE8 browser does not cause
the browser to crash. [BNYF-7982]
The Warn block page triggered by a MIME type includes a Proceed button as expected. [BNYF-8450]
The Windows Safari browser gets filtered as expected by the Barracuda WSA with the default option 'Filter Specified Applications And
Allow All Others' configured on the ADVANCED > Remote Filtering page. [BNYF-8221]
When a website is blocked for the reason of spyware, all buttons and the option to run the Barracuda Malware Removal Tool are present.
[BNYF-8361]
Firmware Version 7.0.1
What's New in Version 7.0.1
Captive Portal
See the BLOCK/ACCEPT > Configuration page for settings.
Option to apply Captive Portal to one or more IP Subnet/Groups (as defined on the USERS/GROUPS > IP Subnets/Groups pa
ge) as well as to unauthenticated users.
Captive Portal access to the network can allow users to browse:
Using their existing LDAP credentials to log in and be subject to Authenticated policies, OR
Only as a Guest, OR
Based on their choice, selecting either Guest or as Authenticated when presented with the Captive Portal splash/login
page.
Option to present a Logout button for the user on a block page that displays when a policy prevents the user from accessing a
requested website or application. This allows for changing users/logins.
Ability to exclude IP group(s) from Captive Portal.
Temporary Access for Teachers, Students
Admin has option to allow teachers to bypass block pages with login credentials instead of, or in addition to, using tokens to
provide student access to requested websites. Teacher still has option to hand out tokens to students.
Admin can designate entire LDAP groups as Temporary Access administrators. For example, the admin might create a group for
the Science Dept. and assign all teachers in that group Temporary Access administrator rights.
SSL inspection
Configure on ADVANCED > SSL Inspection page.
5
Ability to limit SSL Inspection of web traffic to specific users/groups. This new option provides 2 benefits:
- Enables the admin to better manage this resource-intensive feature.
- Prevents unauthenticated or guest users from getting certificate warnings when browsing over HTTPS because they do not
have the root certificate installed in their browser.
Option to allow end users to download a root SSL certificate from their browsers. May also require authentication for certificate
download. This option is useful if you choose to create a self-signed certificate on the Barracuda Web Filter which needs to be
pushed out to client browsers, instead of uploading a trusted certificate you buy from a certificate authority. Rather than pushing
the self-signed certificate to browsers, you can enable users to download it.
Reporting - Two new summary reports, aggregating existing reports for meaningful snapshots of network activity and Internet activity for
the specified time frame.
Fixed in Version 7.0.1
Significant performance improvement in rendering reports and statistics
Faster reporting interface
Faster rendering of statistics on the BASIC > Status page
Faster log in to the web interface
Status page
Performance Statistics display and align properly. [BNYF-7742, BNYF-7750]
Delay in page loading at Admin login fixed. [BNYF-7994]
When Daily is selected in the Hourly Web Filter Statistics section of the page, the list data is updated and displays the Top 10
records. [BNYF-7837, BNYF-7928]
Reporting
Network Activity Summary adhoc report in PDF format loads and displays correctly. [BNYF-8004]
Top Users by Requests to Spyware Sites adhoc HTML report (Users by Spyware Requests report in version 6.0.1) shows
accurate data when drilling down by Hour or Domains [BNYF-7771]
Sessions by Users report is present. [BNYF-7747]
Barracuda Cloud Control
When managing the Barracuda Web Filter from Barracuda Appliance Control (BAC):
The Web Application Control page now displays blocked applications for both single and group view. [BNYF-7988]
The BASIC > Status page correctly displays statistics. [BNYF-6233, BNYF-7295, BNYF-7413, BNYF-7412, BNYF-7750,
BNYF-7795, BNYF-7837, BNYF-7876, BNYF-7874]
The BASIC > Reports page aligns with the Barracuda Appliance Control display. [BNYF-7355, BNYF-7349, BNYF-7893]
Adhoc reports in HTML format display records correctly. [BNYF-7348]
The User/Group Lookup button works properly on the BLOCK/ACCEPT > Exceptions page. [BNYF-6974]
Policy remains as selected (either Unauthenticated or Authenticated) on BLOCK/ACCEPT > Web App Control page.
[BNYF-7988]
Miscellaneous
Block page now renders with correct background color when user visits blocked websites. [BNYF-7993]
Block page and log in process work properly with maximized window in the IE8 browser. [BNYF-7982]
Firmware Version 7.0
What's New in Version 7.0
User Interface
New look and feel - The new Barracuda Web Filter web interface is cleaner with a new color scheme, but is functionally the
same with no changes to navigation.
Enhanced Dashboard - View live feed of current TCP connections and graphs of blocked requests, user browse times and
bandwidth usage for a quick picture of web traffic on your network.
New controls for viewing logs and switching graph content type on-screen.
Recent Flagged Terms - (Available on 610 and higher) This new section displays a list of the most used suspicious keyword
terms in social media and search engine activities per settings on the BLOCK/ACCEPT > Web Application Monitor page.
These terms are categorized in a suspicious keywords lexicon provided by Barracuda Networks and can be added to by creating
a custom list on the BLOCK/ACCEPT > Web Application Monitor page.
Improved reporting presentation tools as described below.
Limited support for Barracuda Appliance Control (BAC). The new web interface includes several key enhancements,
especially around the dashboard (BASIC > Status page). Future versions of the Barracuda Web Filter firmware will fully support
the new web interface. You can still join your Barracuda Web Filter running version 7.0 to Barracuda Appliance Control, with
limited feature support.
Temporary Access for Teachers, Students - This feature replaces the Temporary Whitelist role. For research projects and other
6
classroom needs, the Temporary Access Portal enables teachers to obtain student access, for a specified time period, to websites that
are typically regulated by administrators. Administrators either create credentials for teachers, or teachers simply log into the portal via
LDAP. From the portal teachers can request domains and/or categories of domains for temporary student access. The Temporary
Access Portal issues a token for each request that the teacher can then give to students for bypassing block pages. To configure, see AD
VANCED > Temporary Access. The BASIC > Temporary Access Requests log tracks activity by teachers who have been given
credentials to request temporary access for their students. The log displays the status of tokens teachers create by username and date,
including expiration date and time of tokens.
Web Application Monitoring (Available on 610 and higher)
Suspicious Keyword Alerts - Applies to terms categorized as related to cyberbullying, profanity, adult or terrorism in social
media interactions. Barracuda Networks provides a lexicon of keywords you want the Barracuda Web Filter to flag for generating
email alerts when they appear in user social media interactions or search engine activities. You can add your own categories and
lists of keywords as well. See the BLOCK/ACCEPT > Web App Monitor page for details and to configure. The BASIC > Status
page includes a listing of the Recent Flagged Terms (Suspicious Keywords) identified in filtered traffic.
New Web App Monitor Log page - This new page on the BASIC tab displays a log of all archived chat, email, user registrations
and social media interaction traffic processed by the Barracuda Web Filter. Configure which kinds of activities you want to
capture on the BLOCK/ACCEPT > Web App Monitor page. Use the BASIC > Web App Monitor Log page to view these
captured application interactions by date, source IP address, username and associated details.
Enhanced HTTPS Filtering
SSL Inspection - In addition to Forward Proxy deployments with the Barracuda Web Filter 610 or higher, now also available for
inline deployments on certain models. See the ADVANCED > SSL Inspection page. Provides for granular control of web 2.0
applications over HTTPS as described above within Facebook, Google Apps, YouTube and more.
HTTPS Block Page - A block page is presented when users attempt to visit a website over HTTPS that either poses a security
risk, violates policy, or that falls under the Warn policy action. Using the HTTP block page template on the BLOCK/ACCEPT >
Block Messages page, you can customize the text on the web page displayed by the Barracuda Web Filter.
Reporting
New reporting engine with enhanced performance for fast response times.
Enhanced PDF and HTML presentation with informative header, footer and easy-to-read layout.
New report set- Organized for Productivity, Safety & Liability, Web Activity, Infection Activity and Administrative (Temporary
Access Requests), including:
Top Facebook Users by Browse Time
Top Users by Bandwidth on Streaming Media Sites
Top Gaming Domains by Requests
Top Users by Requests to Spyware Sites
Top Facebook Users by Browse Time
Top Social Networking Domains by Requests
Top Streaming Media Domains by Requests
Top Streaming Media Domains by Bandwidth
Top Users by Bandwidth on Gaming Sites
Top Users by Blocked Requests
Top Users by Browse Time on Gaming Sites
Top Users by Browse Time on Streaming Media Sites
Top Users by Browse Time on Social Networking Sites
Top Users by Requests to Adult/Pornography/Nudity Sites
Top Users by Requests to Anonymizer Sites
Top Users by Requests to File Sharing/P2P Sites
Top Users by Requests to Intolerance and Hate Sites
Top Users by Requests to Weapons/Violence and Terrorism Sites
Top Suspicious Keywords
Suspicious Keywords by Users
Top YouTube Users by Bandwidth
Top YouTube Users by Browse Time
Audit Log
Temporary Access Request Log
Categories By Temporary Access Requests
Domains By Temporary Access Requests
Users By Temporary Access Requests
New Audit Log - The Barracuda Web Filter maintains a log of events including logins/logouts and changes to configuration settings in
conjunction with role-based administration. The new BASIC > Audit Log page lists these events including date, source IP address,
username, role and associated details.
Policy Rule Checking - From the ADVANCED > Troubleshooting page you can test policy rules applied to traffic on specified servers.
7
You can verify access restrictions and exceptions that you define in the pages on the BLOCK/ACCEPT tab. The Policy Rule Check
returns a list of all of the rules that would apply to traffic and actions (Monitor, Warn, or Deny) that would be taken based on the rule.
Support for External ICAP servers - Ability to redirect traffic from the Barracuda Web Filter to a 3rd party server. Select DLP, Antivirus,
or other dedicated ICAP server on the ADVANCED > External Servers page. The Barracuda Web Filter will first apply all configured
policies to inbound or outbound traffic, and then forward the traffic to the specified ICAP server for DLP scanning, antivirus scanning or
other processing.
Fixed in Version 7.0.0
Version 7.0.0.022
Reordering of exceptions in the List of Exceptions table on the BLOCK/ACCEPT > Exceptions page works and displays properly.
[BNYF-7940]
Version 7.0.0.021
Improved performance by resolving issues with increased CPU usage. [BNYF-7678]
Resolved issue with increased memory usage when running reports. [BNYF-7807]
Fixed in Version 6.0.1
Version 6.0.1.012
Enhancement: Improved memory usage on the Barracuda Web Filter 210.
Enhancement: Improved block page delivery when the number of blocked URLs is high.
Fix: Upgrades to the Barracuda Web Filter 1010 no longer require additional patches.
Version 6.0.1.011
Fix: Application Control using the Packet Inspection method works as expected.
Version 6.0.1.010:
Fix: Performance enhancements for traffic filtering and management interfaces.
Version 6.0.1.009:
Enhancement: DC Agent version 6.0.0.32 now installs, if necessary, the Microsoft .Net Framework 4.0 Client Profile.
Enhancement: Download links for Web Security Agent are upgraded for better usability on the ADVANCED > Remote Filtering page.
Fix: Barracuda Cloud Control no longer displays links from within the Barracuda Web Filter view to download the Barracuda Web Security
Agent or the Barracuda DC Agent. These agents must be downloaded via the local web interface of each Barracuda Web Filter.
[BNYF-6272]
Fix: Improved policy engine stability. [BNYF-6257]
Fix: The Barracuda Web Filter properly re-categorizes domains when many custom categories are present, resulting in proper policy
enforcement. [BNYF-6239]
Fix: Web Log updates and filters as expected. [BNYF-6244], [BNYF-6282], [BNYF-6256]
Fix: Web Application Monitor notifications are sent out as expected. [BNYF-6294]
Fix: HTTPS access to the web interface (ADVANCED > Secure Administration page) works as expected. [BNYF-6233]
Fix: Configuration Backup while using the primary IP address as the local service address works as expected. [BNYF-6291].
Fixed in Version 6.0
Version 6.0.0.012:
Enhancement: Improved performance of serving block pages.
Fixed in Version 5.0.0
Version 5.0.0.016:
Enhancement: Improved reporting performance.
Fix: Improved web interface performance at high system loads.
8
Deployment Options
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You can deploy your Barracuda Web Filter so it is inline with your core network components or you can deploy the system as a forward proxy.
The following sections provide a brief overview of inline and forward proxy deployment types, including virtual machine deployment. Barracuda
Networks recommends reviewing and determining the best deployment option for your network before continuing with installation. As you
determine the best deployment for your organization, please also see Step 1: Network Considerations.
In this Section
Inline Pass-Through (Transparent) Mode Deployment
Forward Proxy Deployment of the Barracuda Web Filter
High Availability - Clustering the Barracuda Web Filter
Inline Pass-through With Pre-existing Proxy Deployment
Connecting Inline to your Network with a Pre-existing Proxy Server
Deploying the Barracuda Web Filter with a Peer Proxy
Source-Based Routing
Dual Bridge Deployment 7.0
VLAN Deployments
Virtual Deployment
WCCP Deployment 6.x
WCCP Deployment 5.x
Proxying Web Traffic Using a PAC File
Inline Pass-Through (Transparent) Mode Deployment
en
Inline pass-through is the recommended type of deployment for the Barracuda Web Filter appliance (not supported by the Barracuda Web Filter
Vx virtual machine) because it provides the strongest level of protection against spyware. In this deployment, the Barracuda Web Filter is directly
inline with your core Internet network components, and all network traffic to the Internet passes through the Barracuda Web Filter. In this mode,
your Barracuda Web Filter is able to:
Filter and scan all Internet traffic requests
Perform content filtering and scan downloads for spyware and viruses
Filter web-based and non web-based applications
Detect and block outbound spyware protocol requests
Scan all outbound traffic for spyware activity on all ports to detect infected clients
Perform SSL Inspection – i.e. scanning of HTTPS traffic at the URL level - see Using SSL Inspection With the Barracuda Web Filter for
details and requirements. Available on the Barracuda Web Filter 410 and higher.
Note that you can deploy a hybrid of forward proxy and inline for specific use cases such as, for example:
A mixed environment of terminals and desktops. If you want to apply different browsing policies to each group of users, you
can proxy traffic from the terminals to the Barracuda Web Filter IP address on port 3128, while connecting the desktops inline
using the LAN/WAN bridge, enabling filtering of application traffic from the desktops as well as HTTP and HTTPS traffic. See
also Forward Proxy Deployment of the Barracuda Web Filter. In this scenario you can also use different authentication
mechanisms for each group, as described in Hybrid Authentication Mechanisms.
Inline pass-through deployment requires you to have an understanding of your network topology because even though the Barracuda Web Filter
acts as a proxy, it does not participate in routing protocols. As a result, you may need to set up static routes in your Barracuda Web Filter so it
knows how to properly route traffic.
Per Figure 1 below, you’ll typically route traffic from your switch or router, via the Barracuda Web Filter, to the internal IP address of your firewall
or another device used for routing on the WAN side of the Barracuda Web Filter.
The following table describes the advantages and disadvantages of deploying your Barracuda Web Filter in inline pass-through mode.
9
Advantages
Disadvantages
Supports application blocking.
May require setting up static routes in your Barracuda Web Filter.
Supports automatic pass-through mode in the event of a system
failure (model 310 and above).
Initial setup requires an interruption to network traffic while you make
necessary cabling changes.
Does not require users to configure proxy server settings in their web
browser.
Uses perimeter transparency mode that exposes client IP addresses
(supports corporate firewall rules).
Figure 1: Inline Pass-through Deployment.
10
Forward Proxy Deployment of the Barracuda Web Filter
en
A key advantage of this deployment is that initial setup does not require any interruptions to your network traffic. However, be aware
that, in a forward proxy deployment, only HTTP/HTTPS Internet traffic passes through the Barracuda Web Filter. As such, in this
mode the Barracuda Web Filter does not scan non-HTTP traffic for viruses and spyware, nor does it block applications. Please see
Limitations of This Deployment Type below for more details. Note that you must use either this deployment or WCCP
Deployment for the Barracuda Web Filter Vx.
How This Deployment Works
The Forward Proxy deployment uses a proxy, the Barracuda Web Filter, as an
intermediary between a client and the Internet to protect the client from being visible
from the Internet. After the Barracuda Web Filter processes clients' HTTP/HTTPS
requests, it sends the requests out directly to the Internet. When deployed as a forward
proxy, the Barracuda Web Filter shows all HTTP/HTTPS traffic as coming from its own
IP address instead of from the individual client IP addresses as is done in the inline
pass-through deployment.
Barracuda Networks recommends deploying the Barracuda Web Filter in forward proxy
mode in the following situations:
You need to replace an existing forward proxy (such as Microsoft ISA Server)
with the Barracuda Web Filter.
You do not want the Barracuda Web Filter to reside inline with all your network
traffic and are satisfied with the system only scanning HTTP/HTTPS traffic fo
r viruses and spyware.
Related Articles
Proxying Web Traffic Using a PAC
File
Inline Pass-Through (Transparent)
Mode Deployment
Note that you can deploy a hybrid of forward proxy and inline for specific use cases such as, for example:
A mixed environment of terminals and desktops. You can proxy traffic from the terminals to the Barracuda Web Filter IP
address as described below, while connecting the desktops inline using the LAN/WAN bridge, enabling filtering of application
traffic from the desktops as well as HTTP and HTTPS traffic from both the desktops and the terminals. See Inline
Pass-Through (Transparent) Mode Deployment for more information on inline deployment.
The figure below illustrates a basic installation using the Forward Proxy Deployment.
11
Configuring Forward Proxy Mode
To set up the Barracuda Web Filter as a forward proxy without placing it inline, you must manually direct all outgoing web traffic you want filtered
through the Barracuda Web Filter. You can specify specific types of traffic to bypass the Barracuda Web Filter either manually in the browser
proxy settings, or by pushing out a PAC file with a GPO.
To configure Forward Proxy Mode:
1. Connect either the WAN or LAN port of the Barracuda Web Filter to the same switch as the network gateway (just one network hop
away).
2. Do one of the following:
a. Configure the browsers of all users with the IP address of the Barracuda Web Filter as their forward proxy server on port 3128. If
you wish to use a different port, you can change the Proxy Port setting on the ADVANCED > Proxy page of the Barracuda Web
Filter web interface. OR
b. Create a PAC file and use a GPO to push it out to all client browsers. The PAC file provides lots of flexibility as to which traffic is
filtered and can provide load balancing. See Using a PAC File below.
3. From the BASIC > IP Configuration page of the web interface, set the Operating Mode to Active. Note that Audit mode does not
apply to this deployment; in either Audit or Active modes, traffic will be logged and policy will be applied.
Limitations of This Deployment Type
Because the Barracuda Web Filter only scans outbound HTTP/HTTPS traffic in this deployment, the system cannot perform the following
functions in Forward Proxy mode:
Block access to applications listed on the BLOCK/ACCEPT > Applications pages.
Block access to applications that use the destination IP address specified on the BLOCK/ACCEPT > IP Block/Exempt page.
Block access to applications that use the destination port specified on the BLOCK/ACCEPT > IP Block/Exempt page.
Inspect outbound traffic for spyware infection activity.
Scan non-HTTP traffic for viruses and spyware.
12
Proxying Web Traffic Using a PAC File
You can create a custom Proxy Auto-Configuration (PAC) file and use a windows GPO to push out proxy settings for some or all HTTPS traffic to
client browsers. This method of proxying web traffic to the Barracuda Web Filter has the following advantages:
You can automatically configure all client browsers with proxy instructions rather than manually configuring them.
A PAC file affords lots of flexibility since you can optionally proxy specific traffic - domains, URLs, internal versus external traffic - to a
specific Barracuda Web Filter, or directly to the internal or external internet.
You can set up load balancing of web traffic and failover (with multiple Barracuda Web Filters) in case one system is not available.
See Proxying Web Traffic Using a PAC File for details and examples of what you can do with a PAC file.
High Availability - Clustering the Barracuda Web Filter
en
Using the Linked Management feature you can cluster, or link two or more Barracuda
Web Filters together to provide high availability. Linking multiple Barracuda Web Filters
automatically synchronizes most configuration settings and policies among the
systems.
Linked systems can be geographically dispersed and do not need to be co-located on
the same network. Note that Linked Management does not provide load-balancing
functionality. The Barracuda Web Filter uses port 8002 to synchronize configuration
between linked systems. Use the ADVANCED > Linked Management page to link
multiple Barracuda Web Filters. This feature is available on the Barracuda Web Filter
410 and above.
Related Articles
Forward Proxy Deployment
How to Install a Certificate From a
Trusted CA for SSL Inspection
How to Create and Install a
Self-Signed Certificate for SSL
Inspection
Some network environments may not be suitable to linking multiple Barracuda Web Filter systems together. For example, if you have multiple
network segments that each require different policies, it may be better to provide a dedicated, unlinked Barracuda Web Filter for each segment.
This way you can configure each Barracuda Web Filter without the configuration settings propagating to the other systems.
Important for WCCP Deployments
If you are using a WCCP Deployment, please contact Barracuda Networks Technical Support to confirm that your configuration of
linked Barracuda Web Filters is correct.
High Availability Deployment Options
Consider the following methods for deploying linked Barracuda Web Filters for failover and, in some cases, load balancing, depending on your OS
and network configuration:
Method 1: Use a PAC file with a GPO. Create a PAC file on your network and use Windows GPO to tell client browsers where to locate the PAC
file. The PAC file indicates the proxy server URL (Barracuda Web Filter) to which the browsers are to proxy user requests. In the PAC file you can
also specify URL exceptions that won’t accept proxied requests. The advantages of this method are:
In the PAC file you can specify a primary and secondary Barracuda Web Filter IP address so that if one is unavailable, the browser will proxy to
the other.
You can specify URL exceptions in the PAC file for which you want user requests to bypass the Barracuda Web Filter. These exceptions might
include intranet sites or other sites that accept connections from particular ‘allowed’ IP addresses.
Method 2: Use a PAC file with autodetection via DHCP or DNS. This is an alternative to using a Windows GPO to propagate PAC file information
to client browsers.With DHCP, updates to your clients can include PAC file location information along with dynamically assigned IP addresses and
other attributes. Configure this in your DHCP server settings. With DNS, you can add a hostname wpad (web proxy auto discovery) to your
domain name in the DNS server. The wpad contains the IP address where the PAC file is hosted on the network.
13
Method 3: Use a Barracuda Load Balancer. This deployment makes sense if your network requires dynamic traffic load balancing. In this case,
your client browsers will proxy traffic to a virtual IP address - the load balancing device - which then load balances traffic to the Barracuda Web
Filters. The Barracuda Load Balancer provides failover and dynamic traffic load balancing.
Method 4: Use Multiple A Records. For each Barracuda Web Filter in the cluster, make an A record in your DNS server with the same hostname.
Depending on what IP address to which the user',s machine resolved the hostname, they may get a proxy error.
Data Propagated to the Linked Systems
Linking systems together not only makes it easier to manage multiple Barracuda Web Filters, but it also provides 100 percent redundant coverage
of the propagated configuration and policy (Block/Accept) data. Table 2.2 identifies the data that is propagated to the other linked systems when a
new system joins.
Propagated Data
Data Not Propagated
System settings (global and domain) configured through the web
interface. This includes the block/accept filters.
System IP configuration (IP address, subnet mask, default
gateway, and DNS server) configured on the BASIC > IP
Configuration page.
System password and time zone as configured on the BASIC >
Administration page.
Cluster hostname and cluster local host map configured on the A
DVANCED > Linked Management page.
Static route settings as configured on the BASIC > IP
Configuration page.
Branding image and image URL as configured on the ADVANC
ED > Appearance page.
VLAN configuration settings as configured on the ADVANCED >
Advanced Networking page.
Source-based routes as defined using the IP Routing feature.
See the ADVANCED > Advanced Networking page.
SSL Inspection Certificates as configured on the ADVANCED >
SSL Inspection page.
Kerberos and NTLM settings on the USERS/GROUPS >
Authentication page.
Switching a System to Standby Mode
You can also use the ADVANCED > Linked Management page to switch a linked system from Active to Standby mode. When a system is in S
tandby mode, it does not synchronize its configuration with the other active systems in the cluster.
Barracuda recommends switching a system to Standby mode when you need to:
Upgrade the firmware of all systems in a cluster. If a system is part of a cluster, Barracuda recommends changing the system’s mode to
Standby before you upgrade its firmware, and then repeat this process on each system in the cluster. After the firmware on each system
has been upgraded, you can then change the mode on each system back to Active. Changing a linked system to Standby mode before
upgrading prevents a system on a more recent firmware version from trying to synchronize its configuration with a system on an earlier
firmware version.
Perform maintenance that requires a system to be powered down or disconnected from your network. For example, if you need to
physically move a Barracuda Web Filter, you should change its mode to Standby so the other systems in the cluster do not try to
synchronize their configuration while the system is down.
Inline Pass-through With Pre-existing Proxy Deployment
en
This deployment type is much less common than either Inline mode or Forward Proxy mode, and involves deploying the Barracuda Web Filter as
an inline device that uses a pre-existing proxy server on your network. This type of deployment is not recommended because it breaks the
following features of the Barracuda Web Filter:
14
Infection reports do not display the IP addresses of infected clients.
Infected clients cannot be automatically redirected to the Barracuda Malware Removal Tool.
To resolve these issues, Barracuda Networks recommends that you remove your pre-existing proxy server and deploy the Barracuda Web Filter
inline as described in Inline Pass-Through (Transparent) Mode Deployment.
The Barracuda Web Filter can be placed on the client or the server side of the existing proxy server. If the existing proxy server is performing user
authentication, then the Barracuda Web Filter must be placed on the server side of the proxy. In this deployment, the Barracuda Web Filter
detects all network traffic. The proxy server connects directly to the Barracuda Web Filter LAN port. This connection may require a crossover
cable. No special port or IP address is required.
The Barracuda Web Filter scans for all inbound and outbound HTTP traffic from the proxy server. All outbound traffic on other ports is scanned for
normal spyware communication. However, since the proxy server will most likely hide user identity, the Barracuda Web Filter cannot apply any
user, group or IP based policies. Figure 1 below illustrates this deployment type.
Alternatively, the Barracuda Web Filter can be placed inline on the client side of the existing proxy server. The LAN Switch can be connected to
the LAN port of the Barracuda Web Filter and the WAN port of the Barracuda Web Filter can be connected to the Proxy Server. This will ensure
that the Barracuda Web Filter can identify users before the requests are proxied. In this configuration, you may have to ensure that the Barracuda
Web Filter passes client IP addresses through to the proxy server or that the proxy server can handle requests coming from the Barracuda Web
Filter’s IP address. However, this configuration may not work when the proxy server is performing strong user authentication.
The placement of your pre-existing proxy server and its functionality will have an impact on the Barracuda Web Filter deployment. Some
configurations may require technical assistance from Barracuda Networks Technical support. Please see Contacting Barracuda Networks
Technical Support. To connect your Barracuda Web Filter with this deployment mode, see Connecting Inline to your Network with a
Pre-existing Proxy Server.
Figure 1: Inline Passthrough with Pre-existing Proxy Server Deployment.
15
Connecting Inline to your Network with a Pre-existing Proxy Server
en
This article follows Inline Pass-through With Pre-existing Proxy Deployment.
To set up the Barracuda Web Filter inline with your existing proxy server, place the proxy server between the Barracuda Web Filter and your
internal network switch.
If you have a proxy server, most HTTP requests are routed from your internal network through the proxy server to the Barracuda Web Filter.
When a website responds, the responding traffic goes through the Barracuda Web Filter, which filters any spyware and viruses before allowing
the traffic to go through the proxy server and back to the clients.
The Barracuda Web Filter has been tested with Microsoft ISA and Squid proxy servers.
To connect your Barracuda Web Filter and existing proxy server to your network:
1. Connect your LAN port from your proxy server to the Uplink port of your internal network switch.
16
1.
Figure 1: Proxy Behind the Barracuda Web Filter.
2. Connect the Ethernet cable from your WAN port of your proxy server to the LAN port on the Barracuda Web Filter. Note that you do not
need to configure the WAN port. The Barracuda Web Filter creates an Ethernet bridge between the WAN and LAN ports.
A crossover cable may be needed if your corporate firewall does not have a switchable port and therefore cannot switch
between RX and TX. Another solution is to place a switch between the corporate firewall and the Barracuda Web Filter.
3. Connect an Ethernet cable from the WAN port on the Barracuda Web Filter to the LAN port on your firewall.
4. Go to the BASIC > IP Configuration page in the web interface, and set the Operating Mode to Active.
Deploying the Barracuda Web Filter with a Peer Proxy
en
In this deployment, the Barracuda Web Filter is deployed inline or as a proxy and is configured to forward all port 80 traffic to a pre-existing proxy
server. The proxy server can be anywhere on or off the network, and it sends filtered traffic from the Barracuda Web Filter to the Internet. The
Barracuda Web Filter just needs to be configured with the IP address and port of the proxy server as described below.
For this deployment, configure the following on the ADVANCED > Proxy page of the Barracuda Web Filter web interface:
1. Peer Proxy IP: Enter the IP address of a pre-existing proxy server which will forward traffic from the Barracuda Web Filter to the
17
1.
Internet.
2. Peer Proxy Port: If you have a pre-existing proxy server, enter the port number used for HTTP requests.
Using SSL Inspection
If you have this feature enabled on the Barracuda Web Filter, to protect sensitive data, it is recommended to only use SSL Inspection if the peer
proxy server is deployed inside the firewall. To use SSL Inspection, see How to Configure SSL Inspection 6.x or How to Configure SSL Inspection
7.0.
Using Authentication
Authentication is supported with a peer proxy if the Barracuda Web Filter is deployed in a proxy configuration. See Forward Proxy Deployment of
the Barracuda Web Filter.
Source-Based Routing
en
This configuration is available with any type of Barracuda Web Filter deployment.
If you have clients or networks that you want to route to the Internet via a different
gateway than the default set for the Barracuda Web Filter, you can configure routing by
specifying the source and destination IP addresses and gateways using the IP Routing
feature. See the ADVANCED > Advanced Networking page to set up source based
routing.
For example, assume your organization has multiple physical locations. The server
dedicated to Sales services and resources is located in Los Angeles, and a user in the
Sales department at the Atlanta office needs to access those resources on the
corporate intranet. Rather than use the default route to the cloud, the user has a
secondary exit point (172.32.0.254) that handles all intranet activity across a dedicated
connection to the 10.1.0.0/16 (Corporate Resources) network.
Related Articles
Forward Proxy Deployment of the
Barracuda Web Filter
Inline Pass-Through (Transparent)
Mode Deployment
Directing Traffic to the Barracuda
Web Filter Vx
WCCP Deployment 6.x
Policy-Based Routing
The Barracuda Web Filter can look at traffic from the user’s machine (client) and direct the traffic to the appropriate gateway based on the source
/ destination of the traffic. If the packet is bound for a corporate resource, in this instance the Barracuda Web Filter will route it out via the internal
router, and all other traffic will proceed to the Internet via the Firewall.
Figure 1: Source Based Routing Provided by the Barracuda Web Filter.
18
To set up the Barracuda Web Filter per the above example, go to the IP Routing section of the ADVANCED > Advanced Networking page and
configure the following settings. This example configures the Barracuda Web Filter so that all client traffic from the 172.32.0.0 subnet routes to the
specified Destination IP Address via the Gateway Address.
The IP addresses used in this example are just that - example addresses for demonstration purposes. Make sure to obtain the correct
IP address and netmask values for your network for the actual configuration.
Setting
Meaning and example value
Source IP Address
IP address of client or network to be routed to the alternate gateway.
Enter 172.32.0.0 for the subnet the client is coming from.
Source Netmask
Netmask of client or network to route to the alternate gateway; enter
255.255.0.0.
Destination IP Address
Alternate gateway (the corporate intranet, in this case) to which you
want to route the client(s) or network. Enter 10.1.0.0.
Destination Netmask
Netmask of alternate gateway. Enter 255.255.0.0.
Gateway Address
Gateway address through which you're routing these clients/networks
to the Internet - this would be the address of the Internal Router as
shown above. Enter 172.32.0.254.
Dual Bridge Deployment 7.0
en
This deployment type is much less common than either Inline mode or Forward Proxy mode and is only available with the Barracuda Web Filter
910 or 1010 running version 7.0 and higher. For organizations wishing to filter two separate traffic streams through one Barracuda Web Filter, this
deployment operates in Active/Active mode. The Barracuda Web Filter 910 and 1010 each have two LAN and WAN ports on the chassis. Traffic
routed from two separate switches, for example, can each be routed to one LAN. Each LAN and WAN can be assigned different IP addresses.
<put screenshot here of BASIC > IP config page from 1010 - need to get 7.0 from Bhavin when he has it, after release of 6.0.1.012 >
Deployment emulates two Barracuda Web Filters, where all settings except for the IP addresses of both ports are the same as applied to both
19
traffic streams.
Figure 1: Dual Bridge Deployment
VLAN Deployments
en
VLAN - Bridge Configuration
The Barracuda Web Filter can filter and route tagged traffic for multiple VLANs to the Internet, preserving the segregation of the VLANs on the
WAN port (to the Firewall). In a VLAN deployment, the LAN and WAN ports behave like trunk ports much like a switch or router. For cases in
which multiple VLANs need to send traffic through the Barracuda Web Filter to the Internet, and you want to preserve the segregation of these
VLANs, use the Bridge VLAN deployment, connecting multiple VLANs to the LAN side of the Barracuda Web Filter.
You can also use this deployment configuration to route multiple networks (not VLANs, but untagged traffic) sending outbound traffic through the
Barracuda Web Filter.
Important Notes
Barracuda recommends testing your VLAN deployment during low traffic periods or outside of regular business hours.
Note that transporting multiple VLANs across the same Ethernet connection requires a trunk line.
Bridge VLAN deployment is the most common.
If you need to contact Barracuda Technical Support, you should have the Barracuda Web Filter connected to see traffic into the
unit. Also, having a network diagram available to show Barracuda Technical Support will greatly assist in understanding your
deployment configuration.
The Barracuda Web Filter needs to be part of a VLAN to pass tagged 802.1Q traffic. To set up for 802.1Q traffic, you will need:
A list of all VLANs that pass through the Barracuda (name and number).
The Subnet mask for each VLAN.
Corresponding Default Gateway IP addresses for each VLAN.
An unused IP address within each VLAN that is exempt from DHCP.
For more details about VLAN configuration, click the Help button on the ADVANCED > Advanced Networking page.
20
Figure 1: Bridge VLAN Deployment.
To configure, from the web interface, navigate to the ADVANCED > Advanced Networking page. In the VLAN Configuration section, first select
Bridge for VLAN Interface.You will need to create a name and ID for each VLAN. For example, if the marketing department is on one VLAN and
the finance department is on another, call them MRK_VLAN and FIN_VLAN. Each ID should be unique, in the range specified on the ADVANCE
D > Advanced Networking page.
Every VLAN or subnet that you are routing to the Barracuda Web Filter needs to be associated with a valid IP address, and you make that
21
association by creating a virtual interface. In the Virtual Interfaces section of the ADVANCED > Advanced Networking page, you will need to
enter the IP address and associated information for each VLAN or subnet. Please see the online help for details on VLAN configuration.
VLAN Deployment - LAN Configuration
If you have multiple VLANs or subnets and you want to filter the traffic but not expose the traffic outside of your network, use the LAN
configuration of a VLAN deployment. In this case, all VLAN or subnet traffic is NAT'ed by the Barracuda Web Filter and requests are proxied via
the WAN port to the Internet.
Figure 2: LAN-VLAN Deployment.
To configure, from the web interface, navigate to the ADVANCED > Advanced Networking page. In the VLAN Configuration section, first
select LAN for VLAN Interface. You will need to create a name and ID for each VLAN. Then, using the Virtual Interfaces section of the page,
associate each VLAN with a Virtual Interface which is defined with an IP address, a Netmask and a Gateway address.
For example, if the marketing department is on one VLAN and the finance department is on another, you might name your VLANs "MRK_VLAN"
and "FIN_VLAN". Each ID should be unique, in the range specified on the ADVANCED > Advanced Networking page. See the online help for
more details on VLAN configuration.
VLAN Deployment - System Configuration
Use the System VLAN when the Barracuda Web Filter does NOT reside in the native VLAN. The system is now only accessible from its own
VLAN. Set System VLAN to one of the VLAN Interfaces you added in the VLAN CONFIGURATION section of the ADVANCED > Advanced
Networking page.
Virtual Deployment
en
22
Before setting up your Barracuda Web Filter Vx, you might want to consider the best deployment option for your network
configuration:
Forward Proxy deployment.
WCCP cache engine on a network with a WCCP capable core routing platform.
Since the Barracuda Web Filter Vx does not support inline deployments, application filtering is not supported. All other
features and functions of the Barracuda Web Filter appliance are supported by the Vx. Note that this virtual appliance requires a
64-bit capable host.
In this Section
Step 1: Select Your Hypervisor Package:
Download Package Type
Hypervisor Compatibility
OVF Package
VMware ESX and ESXi ("vSphere Hypervisor") versions
4.0, 4.1, 5.x
VMware ESX and ESXi version 3.5
VMX Package Deployment
VMware Server 2.0+
Workstation 6.0+, Player 3.0+
Fusion 3.0
VHD Package
Microsoft Hyper-V 2008 – 2012
XVA Package Deployment
Citrix XenServer 5.5+
Step 2: Getting Your Virtual Machine Up and Running:
Quick Start Guide
Step 3: Get Traffic Flowing:
Directing Traffic to the Barracuda Web Filter Vx
Managing Your Virtual Machine:
Adding Disk Space, Drives and RAM for Your Virtual Appliance
Backing Up Your Virtual Machine System State
Hypervisor Compatibility and Deployment - OVF Package
en
Hypervisor Compatibility
This package's virtual appliance runs under the following hypervisors:
VMware ESX and ESXi ("vSphere Hypervisor") versions 4.0, 4.1 and 5.x
VMware ESX and ESXi version 3.5
Sun/Oracle VirtualBox and VirtualBox OSE version 3.2
Deploying the Virtual Appliance With Your Hypervisor
ESX(i) 3.5:
Use the OVF file ending in:
-35.ovf
for this environment.
1. From the File menu in the VMware Infrastructure client, choose Virtual Appliance -> Import
2. Select Import from file: and navigate to the file BarracudaWebFilter-vm3.1.0-fw__FIRMWARE__-20120327-35.ovf.
3. Clicking Next, review the appliance information, End User License Agreement, and set the name of the virtual appliance to something
23
3.
useful to your environment. Click Finish.
4. Once your appliance has finished importing, right-click it and choose Open Console and then click the green arrow to power on the
virtual appliance.
5. Follow the Quickstart Guide - Vx instructions to provision your virtual appliance.
ESX(i) 4.x:
Use the OVF file ending in:
-4x.ovf
for this environment.
1. From the File menu in the vSphere client, choose Deploy OVF Template...
2. Select Import from file: and navigate to the file BarracudaWebFilter-vm3.1.0-fw__FIRMWARE__-20120327-4x.ovf.
3. Clicking Next, review the appliance information, End User License Agreement, and set the name of the virtual appliance to something
useful to your environment. Set the network to point to the target network for this virtual appliance.
4. Once your appliance has finished importing, right-click it and choose Open Console and then click the green arrow to power on the
virtual appliance.
5. Follow the Quickstart Guide - Vx instructions to provision your virtual appliance.
VirtualBox:
Use the OVF file ending in:
-4x.ovf
for this environment.
1.
2.
3.
4.
5.
From the File menu in the VirtualBox client, choose Import Appliance.
Navigate to the file BarracudaWebFilter-vm3.1.0-fw__FIRMWARE__-20120327-4x.ovf
Use the default settings for the import and click Finish.
Start the appliance.
Follow the Quickstart Guide - Vx instructions to provision your virtual appliance.
Hypervisor Compatibility and Deployment - VMX Package
en
Hypervisor Compatibility
This package's virtual appliance runs under the following hypervisors:
VMware Server 2.0+
Workstation 6.0+, Player 3.0+
Fusion 3.0+
Deploying the Virtual Appliance With Your Hypervisor
Server 2.x:
1. Put the files ending in .vmx and .vmdk into a folder in your datastore (which you can locate from the Datastores list on your server's
summary page).
2. From the VMware Infrastructure Web Access client's Virtual Machine menu, choose Add Virtual Machine to Inventory.
3. Navigate to the folder used in step 1 and click the file BarracudaWebFilter.vmx from the list under Contents. Click OK.
4. Start the appliance.
5. Follow the Quickstart Guide - Vx instructions to provision your virtual appliance.
Player 3.x:
1.
2.
3.
4.
5.
From the File menu, choose Open a Virtual Machine.
Navigate to the file BarracudaWebFilter.vmx
Use the default settings and click Finish.
Start the appliance.
Follow the Quickstart Guide - Vx instructions to provision your virtual appliance.
Workstation 6.x:
24
1.
2.
3.
4.
5.
From the File menu, choose Open a Virtual Machine.
Navigate to the file BarracudaWebFilter.vmx
Use the default settings and click Finish.
Start the appliance.
Follow the Quickstart Guide - Vx instructions to provision your virtual appliance.
Fusion 3.x:
1.
2.
3.
4.
5.
From the File menu, choose Open a Virtual Machine.
Navigate to the file BarracudaWebFilter.vmx
Use the default settings and click Finish.
Start the appliance.
Follow the Quickstart Guide - Vx instructions to provision your virtual appliance.
Hypervisor Compatibility and Deployment - XVA Package
en
Hypervisor Compatibility
This package's virtual appliance runs under the following hypervisors:
Citrix XenServer 5.5+
Deploying the Virtual Appliance With Your Hypervisor
1.
2.
3.
4.
5.
From the File menu in the XenCenter client, choose Import VM...
Browse to the file BarracudaWebFilter-<version#>-fw__FIRMWARE__-<version#>.xva and choose the Exported template radio button.
Clicking Next >, review the template information and click Finish to import the template.
Right-click the resulting template and choose New VM...
Follow the Quick Start Guide - Vx instructions to provision your virtual appliance.
Hypervisor Compatibility and Deployment - VHD Package
en
Hypervisor Compatibility
This package's virtual appliance runs under Microsoft Hyper-V 2008 – 2012 and is supported by the Barracuda Web Filter versions 7.1
and higher.
Deploying the Virtual Appliance with Microsoft Hyper-V 2008
1. In Hyper-V Manager, right-click your VM Host and choose Import Virtual Machine...
2. Browse to the folder
BarracudaWebFilter-vm<version#>-fw__FIRMWARE__-<version#>-hyperv/HyperV
that was expanded as part of this archive.
3. Click Select Folder when inside the correct folder (it should have subfolders Virtual Machines, Virtual Hard Disks, and Snapshots sho
wing).
4. Select Copy the virtual machine and Duplicate all files and click Import.
5. Start your virtual appliance.
6. Follow the Barracuda Web Filter Vx Quick Start Guide instructions to provision your virtual appliance.
Deploying the Virtual Appliance with Microsoft Hyper-V 2012
1. In Hyper-V Manager, right-click your VM Host and choose Import Virtual Machine...
2. Click Before you begin-> Next
3. Browse to the folder
BarracudaWebFilter-vm<version#>-fw__FIRMWARE__-<version#>-hyperv/HyperV
that was expanded as part of this archive
4. Click Select Folder when inside the correct folder (it should have subfolders Virtual Machines, Virtual Hard Disks, and Snapshots sho
wing)
5. Select Virtual Machine -> Next
6.
25
6. Choose Import Type -> Copy the virtual machine (Create a new unique ID)
7. Click Summary -> Finish
Barracuda Web Filter Vx Quick Start Guide
en
To setup your Barracuda Web Filter Vx, complete the following steps:
en
Before You Begin
Step 1. Enter the License Code
Step 2. Log Into the Web Interface and Configure Domain Information
Step 3. Configure Your Firewall
Step 4. Update the Firmware
Step 5. Change the Administrator Password
Next Step
Related Articles
Directing Traffic to the Barracuda
Web Filter Vx
Adding Disk Space, Drives and
RAM
Backing Up Your Virtual Machine
System State
Before You Begin
Deploy the Barracuda Spam Firewall Vx on your hypervisor. You will need only a single virtual NIC on your virtual appliance.
Step 1. Enter the License Code
Once your virtual appliance has been deployed, it's time to provision it. You need your Barracuda Vx license token, which you received via email
or from the website when you downloaded the Barracuda Spam Firewall Vx package. If not, you can request an evaluation on the Barracuda
Networks website at http://www.barracuda.com. The license token is a 15 character string, formatted like this: 01234-56789-ACEFG.
1. In your hypervisor client, start your virtual appliance, and then open the Console.
2. When the login prompt appears, log in as admin with a password of admin.
3. Arrow down to TCP/IP Configuration. Set the IP address, Netmask Default Gateway, Primary DNS Server and Secondary DNS Server
for your virtual appliance. These fields can later be edited if needed from the BASIC > IP Configuration page in the product web
interface.
4. Arrow down to Licensing and enter your Barracuda License Token and default domain to complete provisioning.
5. Arrow down to Save Changes and press Enter.
6. The virtual appliance will reboot.
7. Once the virtual appliance has finished rebooting, go to http://<your ip>:8000 to access the web interface and finalize configuration.
Step 2. Log Into the Web Interface and Configure Domain Information
Once the virtual appliance has finished rebooting, go to http://<your ip address>:8000 to access the Barracuda Web Filter Vx web interface and
finalize configuration of the product:
1. Log into the Barracuda Web Filter Vx web interface as the administrator:
Use Username: admin Password: admin
2. Go to the BASIC > IP Configuration page and enter values for Default Hostname and Default Domain. For example, enter barracuda
as the Default Hostname and <yourcompanydomain.com> as the Default Domain. These names will be associated with anti-spyware
email notification messages from the virtual appliance.
Note that, unlike the Barracuda Web Filter appliance, there is no need or facility to set Operating Mode for the Barracuda Web Filter Vx.
This is because, in Forward Proxy deployment, Audit mode works just like Active mode; traffic is logged and policies are applied.
3.
26
3. Click the Save Changes button to save all of the information.
Step 3. Configure Your Firewall
You will need to configure your network firewall to allow ICMP traffic to outside servers as well as opening port 443 to
updates.barracudacentral.com. You also need to make sure that your DNS servers can resolve updates.barracudacentral.com.
Step 4. Update the Firmware
Click on the Advanced > Firmware Update page. If there is a new Latest General Release available, perform the following steps to update the
system firmware:
1. Click on the Download Now button located next to the firmware version that you wish to install. To view download progress, click on the
Refresh button. When the download is complete, the Refresh button will be replaced by an Apply Now button.
2. Click on the Apply Now button to install the firmware. This will take a few minutes to complete.
3. After the firmware has been applied, the Barracuda Web Filter Vx will automatically reboot, displaying the login page when the system
has come back up.
4. Log back into the Web interface again and read the Release Notes to learn about enhancements and new features. It is also good
practice to verify settings you may have already entered, as new features may have been included with the firmware update.
Step 5. Change the Administrator Password
To avoid unauthorized use, we recommend you change the default administrator password to a more secure password. You can only change the
administrator password for the Web interface. Go to the BASIC > Administration page and enter your old and new passwords, then click on Sav
e Password.
Next Step
Continue with Directing Traffic to the Barracuda Web Filter Vx. See also Adding Disk Space, Drives and RAM for Your Virtual Appliance.
Backing Up Your Virtual Machine System State
en
Virtual machine environments generally provide a "snapshot" capability, which captures the state of a system as it's running. Once a snapshot is
created, you can perform additional operations on the system and "revert" to the snapshot in the case of disaster recovery (or for any other
reason). Because this feature is so powerful, Barracuda Networks strongly recommends performing a snapshot at certain points in time:
Before upgrading the Barracuda Networks product firmware.
Before making major changes to your configuration (this makes snapshotting a convenient "undo" mechanism).
After completing and confirming a large set of changes, such as initial configuration.
As a periodic backup mechanism.
Before taking a snapshot, Barracuda Networks strongly recommends powering off the virtual machine. This step is particularly
important if you are using Microsoft Hyper-V as your virtual machine environment.
Barracuda Networks recommends that you review your virtual environment documentation regarding the snapshot capabilities and be familiar with
their features and limitations.
Directing Traffic to the Barracuda Web Filter Vx
en
There is no need to shut down your virtual machine when making
changes to network connections. On your hypervisor, go to Networks and
choose from available networks on your switches. If adding a network
adaptor to the virtual machine, you must first shut it down.
Related Articles
Forward Proxy Deployment
WCCP Deployment
Policy-Based Routing
Barracuda Web Security Agent How it Works
27
Determine Your Deployment Scenario
The Barracuda Web Filter Vx can be deployed in any configuration except for inline. Deploy your Vx:
1. Using a Forward Proxy Deployment. You can deploy the Barracuda Web Filter Vx in forward proxy mode via PAC file or GPO. This is the
most common deployment scenario. See Forward Proxy Deployment of the Barracuda Web Filter.
2. As a WCCP cache engine on a network with a WCCP capable core routing platform.
3. Using the Barracuda Web Security Agent. Please see Barracuda Web Security Agent - How it Works.
4. Using Policy-Based Routing. This deployment involves redirecting all port 80 traffic from your firewall through a policy-based route to your
Barracuda Web Filter Vx.
Since the Barracuda Web Filter Vx does not support inline deployment, note that the only feature not available to the Vx is application filtering (as
noted on the BLOCK/ACCEPT > Applications page in the Barracuda Web Filter web interface).
Once you have installed your Barracuda Web Filter Vx and configured your firewall, you can test the configuration using the ADVANCED >
Troubleshooting page in the web interface to ping updates.barracudacentral.com.
Sizing CPU, RAM and Disk for Your Barracuda Web Filter Vx
en
Barracuda Networks recommends the following sizing for initial deployment of your virtual appliance, or upgrading existing
installations.
Important: If you will be enabling SSL Inspection on the Barracuda Web Filter 410, you should have a minimum of 4 cores with 8
GB RAM.
RAM, Cores, and Hard Disk
Model
Maximum #Cores
RAM - Recommended
Minimum
Hard Disk Space Recommended Minimum
310
2
2GB
200GB
410
3 or more*
4GB
200GB
610
4
8GB
500GB
higher
limited only by license
2BG per extra core
*As supported by your hypervisor
Provisioning CPUs/Cores
You need to provision the number of cores in your hypervisor before the Barracuda Web Filter Vx can make use of them. Each model can only
make use of a certain number of cores. If you assign 6 cores, for example, to a model 300 Barracuda Web Filter Vx, which can only make use of
2 cores, the virtual machine will turn off the extra cores that cannot be used. To add cores:
1. Shut down your hypervisor.
2. Go into Hypervisor settings.
3. Add CPUs. Note: The number of CPUs shown that you can add will vary with your hypervisor licensing and version. In some cases, the
number of CPUs you can add must be a multiple of 2.
Provisioning Hard Drives
From your hypervisor, you can edit the provisioned size of the hard drives, or you can add a hard drive.
To add a hard drive:
1.
2.
3.
4.
Shut down your Barracuda Web Filter Vx.
Take a snapshot of your virtual machine.
Edit the settings in your virtual machine and either increase the size of the hard drive or add a new hard drive.
Restart the virtual machine. As it’s booting up, a blue screen will pop up and ask if you want to use the new additional space. Answer
‘Yes’. Note that the popup will time out in 30 seconds if you don’t respond, and the answer will default to ‘No’. Resizing may take several
minutes, depending on the amount of provisioned hard drive space.
Related Articles
28
Virtual Deployment
Backing Up Your Virtual Machine System State
WCCP Deployment 6.x
en
The Barracuda Web Filter 310 and 310 Vx and above can be deployed as a WCCP cache engine on a network with a WCCP
capable core routing platform. Because the WCCP control router or switch transparently redirects content requests, you don't need
to configure end users' browsers to use the Barracuda Web Filter as an HTTP proxy. Note the two different deployment diagrams
for filtering HTTP traffic only versus filtering both HTTP and HTTPS traffic. HTTPS support requires running the Barracuda Web
Filter version 6.0.1 or higher.
In addition to compatibility with other WCCP capable routers, the Barracuda Web Filter supports a Cisco switch with at least one
VLAN, WCCPv2, GRE encapsulation, and the HASH routing method. Check your Cisco Systems documentation for the
recommended router/switch/firewall interface configurations.
High Availability and Load Balancing
Enabling WCCP on your Barracuda Web Filter allows you to take full advantage of your WCCP capable Cisco router’s ability to provide for
failover and load balancing for multiple Barracuda Web Filters connected to the router in a proxy configuration. For large installations requiring
high availability and fault tolerance, this is an attractive deployment option. Other ways to achieve high availability with or without using WCCP
are discussed in High Availability - Clustering the Barracuda Web Filter.
Considerations when using the WCCP deployment
WCCP allows Cisco routers/switches to forward non-HTTP traffic to web cache servers, but the Barracuda Web Filter only accepts HTTP/HTTPS
traffic (port 80/443) in this configuration. WCCP also allows multiple Cisco routers to be connected to the same web cache server. The Barracuda
Web Filter does not support this feature and can only be connected to one WCCP router/switch. However, as always, multiple Barracuda Web
Filters can be connected to a single router/switch.
Also note the following:
NTLM and Kerberos authentication mechanisms will not work because they both require that the Barracuda Web Filter be a trusted host
in the Windows Domain and that it receive traffic directly from users (as a proxy). In WCCP deployments, the Barracuda Web Filter
receives outgoing traffic via the Cisco Router.
Application blocking will not work.
Outbound spyware will not be blocked.
HTTPS traffic will be also be filtered if (if you are running version 6.0.1 or higher) if Enable HTTPS Filtering is set to Yes on the BLOCK/ACCEP
T > Configuration page.To filter HTTPS traffic in this mode, make sure to configure the Cisco WCCP services as follows:
Enable Service ID 80 for HTTPS
Enable Service ID 90 for DNS UDP traffic
Enable Service ID 91 for DNS TCP traffic
Figure 1 shows deployment with a WCCP router for filtering HTTP traffic only. For filtering HTTP and HTTPS traffic, see Figure 2. See the BASIC
> IP Configuration page to select and configure WCCP deployment.
Figure 1: WCCP Deployment for filtering HTTP traffic only
29
Figure 2 below shows deployment with a WCCP router for filtering both HTTP and HTTPS traffic. In this deployment, the Barracuda Web Filter
uses a physically separate gateway to the internet relative to the WCCP router. This configuration is appropriate if your switch does not support
VLANs and you want to filter both HTTP and HTTPS traffic with your WCCP router. See the BASIC > IP Configuration page to select and
configure WCCP deployment.
Figure 2: WCCP Deployment for filtering HTTP and HTTPS traffic with a separate gateway for the Barracuda Web Filter.
30
Figure 3 below shows deployment with a WCCP router for filtering both HTTP and HTTPS traffic, and a high availability (HA) deployment of two
Barracuda Web Filters. In this deployment, each Barracuda Web Filter connects to your enterprise-class switch via a separate VLAN. This
configuration is appropriate if your switch supports VLANs and you want to filter both HTTP and HTTPS traffic with your WCCP router. See the B
ASIC > IP Configuration page to select and configure WCCP deployment. Note that you can filter both HTTP and HTTPS traffic with just one
Barracuda Web Filter or with multiple, as shown in this example.
Figure 3: WCCP Deployment for filtering HTTP and HTTPS traffic with the Barracuda Web Filter on a separate VLAN.
31
WCCP Deployment 5.x
en
The Barracuda Web Filter 410 and above running version 5.x can be deployed as a WCCP cache engine on a network with a
WCCP capable core routing platform. Because the WCCP control router or switch transparently redirects content requests, end
users need not configure browsers to use the Barracuda Web Filter as an HTTP proxy. Note the two different deployment diagrams
for filtering HTTP traffic only versus filtering both HTTP and HTTPS traffic.
If you are running firmware 6.x or higher, you can use WCCP deployment with the Barracuda Web Filter 310 and 310Vx and higher.
HTTPS support requires running the Barracuda Web Filter version 6.0.1 or higher. See WCCP Deployment 6.x for more
information.
High Availability and Load Balancing
In addition to compatibility with other WCCP capable routers, the Barracuda Web Filter supports Cisco v1 routers. Enabling WCCP on your
Barracuda Web Filter allows you to take full advantage of your WCCP capable Cisco router’s ability to provide for failover and load balancing for
multiple Barracuda Web Filters connected to the router in a proxy configuration. For large installations requiring high availability and fault
tolerance, this is an attractive deployment option. Other ways to achieve high availability without using WCCP are discussed in High Availability Clustering the Barracuda Web Filter
Considerations when using the WCCP deployment
WCCP allows Cisco routers/switches to forward non-http traffic to web cache servers, but the Barracuda Web Filter only accepts HTTP/HTTPS
traffic (port 80/443) in this configuration. WCCP also allows multiple Cisco routers to be connected to the same web cache server. The Barracuda
Web Filter does not support this feature and can only be connected to one WCCP router/switch. However, as always, multiple Barracuda Web
Filters can be connected to a single router/switch.
Also note the following:
32
NTLM and Kerberos authentication mechanisms will not work because they both require that the Barracuda Web Filter be a trusted host
in the Windows Domain and that it receive traffic directly from users (as a proxy). In WCCP deployments, the Barracuda Web Filter
receives outgoing traffic via the Cisco Router.
Application blocking will not work.
Outbound spyware will not be blocked.
HTTPS traffic will be also be filtered if Enable HTTPS Filtering is enabled from the BLOCK/ACCEPT > Configuration page.To filter HTTPS
traffic in this mode, make sure to configure the Cisco WCCP services as follows:
Enable Service ID 80 for HTTPS
Enable Service ID 90 for DNS UDP traffic
Enable Service ID 91 for DNS TCP traffic
Figure 1 shows deployment with a WCCP router for filtering HTTP traffic only. For filtering HTTP and HTTPS traffic, see Figure 2. See the BASIC
> IP Configuration page to select and configure WCCP deployment.
Figure 1: WCCP Deployment for filtering HTTP traffic only
Figure 2 below shows deployment with a WCCP router for filtering both HTTP and HTTPS traffic. In this deployment, the Barracuda Web Filter
uses a physically separate gateway to the internet relative to the WCCP router. This configuration is appropriate if your switch does not support
VLANs and you want to filter both HTTP and HTTPS traffic with your WCCP router. See the BASIC > IP Configuration page to select and
configure WCCP deployment.
Figure 2: WCCP Deployment for filtering HTTP and HTTPS traffic.
33
Figure 3 below shows deployment with a WCCP router for filtering both HTTP and HTTPS traffic. In this deployment, each Barracuda Web Filter
connects to the switch via a separate VLAN. This configuration is appropriate if your switch supports VLANs and you want to filter both HTTP and
HTTPS traffic with your WCCP router. See the BASIC > IP Configuration page to select and configure WCCP deployment.
Figure 3 - WCCP deployment for HTTP and HTTPS traffic over VLANs
34
Proxying Web Traffic Using a PAC File
en
Whether connecting your Barracuda Web Filter Inline or in Forward Proxy configuration
, you might want to use a Proxy Auto-Configuration (PAC) file to distribute a set of rules
for where to route/proxy web traffic from client browsers to the Barracuda Web Filter, to
intranets or to the internet.
You can create a custom PAC file and use a windows Group Policy Object (GPO) to
push out proxy settings to client browsers. This method of proxying web traffic to the
Barracuda Web Filter has the following advantages:
You can automatically configure all client browsers with proxy instructions
rather than manually configuring them.
A PAC file affords a lot of flexibility since you can optionally proxy specific
traffic - domains, URLs, internal versus external traffic - to one or more specific
Barracuda Web Filters, or directly to the internal or external internet.
You can set up load balancing of web traffic and failover (with multiple
Barracuda Web Filters) in case one system is not available.
Related Articles
Forward Proxy Deployment of the
Barracuda Web Filter
Inline Pass-Through (Transparent)
Mode Deployment
How a PAC File Works
35
A PAC file is a specialized JavaScript function definition that a browser calls to determine how web requests are handled. The web browser
fetches this PAC file before retrieving other pages. The JavaScript function "FindProxyForURL(url, host)" in the PAC file returns a string with one
or more access method specifications. These specifications cause the user agent to either use a particular proxy server or to connect directly to
the internet. The examples below give various scenarios in which you might want to proxy certain web traffic, while routing other web traffic
directly to the internet or intranet.
Examples of PAC File Commands
In Example1 below, you want client browsers to manually proxy certain SSL traffic (https://mail.google.com, for example) to port 3128 of your
Barracuda Web Filter, and you'll use a PAC file like this example to define this for the browsers.
Example 1
When the client makes a request to a website, the web browser refers first to the PAC file. If the client is using a local network address, the
specified proxy server (Barracuda Web Filter) is used on the specified port. If the client is not using a local network address (example: a user is
connecting from a hotel), the PAC file instructs the web browser to connect directly to the Internet.
proxy.pac
function FindProxyForURL(url,host)
{
if (isInNet(myIpAddress(), "10.175.175.0","255.255.255.0")) {
return "PROXY 10.170.2.252:8080";
} else {
return "DIRECT";
}
Example 2
In a PAC file, you can provide for failover by specifying multiple Barracuda Web Filters to proxy traffic to in order of precedence. Or you could load
balance traffic by indicating in the PAC file that traffic to ODD IP addresses should proxy to BarracudaWebFilter1 and traffic to EVEN IP
addresses should proxy to BarracudaWebFilter2. This example PAC file includes these and other scenarios of proxying specific traffic to a
particular Barracuda Web Filter or directly to the internal or external internet.
function FindProxyForURL(url, host) {
// Array of domains not to send to a proxy: these domains, for example, would be domains you trust and don't need to filter.
var no_proxy = new Array("barracuda.com", "barracudanetworks.com", "solstas.com", "spectrumlab.org");
// If URL has no dots in host name, send traffic direct.
if (isPlainHostName(host))
{
return "DIRECT";
}
// If specific URL needs to bypass proxy, send traffic direct.
for(var i=0;i < no_proxy.length; i++)
{
if (shExpMatch(url, no_proxy[i]))
{
return "DIRECT";
}
}
// If you don't want to filter internal web traffic:
// If IP address is internal or hostname resolves to internal IP, send direct.
var resolved_ip = dnsResolve(host);
36
if (isInNet(resolved_ip, "10.0.0.0", "255.0.0.0") ||
isInNet(resolved_ip, "172.16.0.0", "255.240.0.0") ||
isInNet(resolved_ip, "192.168.0.0", "255.255.0.0") ||
isInNet(resolved_ip, "127.0.0.0", "255.255.255.0"))
{
return "DIRECT";
}
// If you want to load balance traffic, you can, for example, send odd IPs to one Barracuda Web Filter
// and even IPs to 2nd Barracuda Web Filter.
// Each PROXY command specifies two Barracuda Web Filters; if one is not available, traffic goes to the other one (fail-over).
var proxy;
var myip=myIpAddress();
var ipbits=myip.split(".");
var myseg=parseInt(ipbits[3]);
//based on the 4th octet being even or odd we'll change proxy priority
if (myseg==Math.floor(myseg/2)*2)
{
// Even
proxy = "PROXY gbobarwebv02.spectrumlab.org:31128; PROXY gbobarwebv01.spectrumlab.org:31128; DIRECT";
}
else
{
// Odd
proxy = "PROXY gbobarwebv01.spectrumlab.org:31128; PROXY gbobarwebv02.spectrumlab.org:31128; DIRECT";
}
return proxy;
}
Getting Started
en
Barracuda Networks recommends first reviewing Deployment Options. When you've determined the right deployment, you're ready to install and
configure the Barracuda Web Filter.
Recommended Steps
If you already installed your Barracuda Web Filter using the Barracuda Web Filter Quick Start Guide which is shipped with your appliance, start
with Step 3: Configure the Barracuda Web Filter. If you are using the Barracuda Web Filter Vx, start with Virtual Deployment.
Step 1: Network Considerations
Step 2: Installation
Step 3: Configure the Barracuda Web Filter
Step 4: Configure and Secure the Web Interface
Step 5: Connect the Barracuda Web Filter to Your Network
Barracuda Web Filter 30 Day Evaluation Guide
Step 1: Network Considerations
en
The Barracuda Web Filter is designed for low-risk deployment because it is intended to
be a bridge within your network. The Barracuda Web Filter can view Internet traffic that
passes through the network but does not affect its routing. To reduce the risk of
37
interfering with important network traffic, initially set the Barracuda Web Filter to monitor
and log the spyware activity only. Determine which internal servers and clients to
exclude from spyware and virus scans.
Related Articles
Using Static Routes
VLAN Deployments
The following pre-installation considerations may help you understand some of the issues that may occur, and Barracuda Networks recommends
reading and understanding the Deployment Options for the Barracuda Web Filter before proceeding.
In this article:
en
Routers
External DNS
Internal DNS
Enterprise class Layer 3 switch, VLANS, VPN concentrators
Firewall DMZ
Caching and the Current Time Setting
QoS/Packet Reconfiguration (Quality of Service, Packet Shapers)
Mounting and cabling considerations
Routers
Make sure the default gateway is properly set to reach the Internet. Also, if you are testing the Barracuda Web Filter in one portion of your
network and move to another portion of the network for deployment, make sure that you check the default gateway and make changes as
necessary.
External DNS
Some of the considerations regarding DNS include the following issues:
Optimal DNS query response time: When the Barracuda Web Filter is in Active mode, it proxies all Internet requests for the clients. As a result,
the Barracuda Web Filter needs to resolve website hostnames to IP addresses while proxying the HTTP requests made by the users. The
response for web server DNS queries needs to be optimal to allow the Barracuda Web Filter to look up and quickly process these requests. A
slow DNS server will cause the Barracuda Web Filter to respond slowly to clients, which adds latency to their Internet access.
Requests for fully qualified Web application server names: If a user attempts to browse to a website by specifying a web server name which
is not a fully qualified name that includes the domain name, the Barracuda Web Filter automatically appends the string barracuda.com to the
unqualified name in order to resolve the request. For example, if the user enters the server name myserver instead of myserver.mydomain.com,
the Barracuda Web Filter resolves the request using the hostname myserver.barracuda.com.
Internal DNS
If you have an internal server that is only resolvable via an internal DNS, make sure that this DNS server is used by the Barracuda Web Filter as a
secondary DNS.
Enterprise class Layer 3 switch, VLANS, VPN concentrators
These device types are normally capable of handling multiple subnets and providing default routes to clients. However, they may affect the
Barracuda Web Filter deployment in the following ways:
A Layer 3 switch can also be set up to have multiple VLANs (Virtual Local Networks) using port assignments. There is no side effect by
having VLAN tags in the traffic that is visible to the Barracuda Web Filter (see also VLAN Deployments). However, when the Barracuda
Web Filter is set up to a single subnet, it needs to have routes to process requests for other subnets. Although all VLAN operations are in
Layer 2, most of the Layer 3 switches have better control since they offer a management user interface. Layer 2 "Smart" switches offer
VLAN support as well. Layer 3 switches primarily differ from their capabilities of routing in IPv4 and IPv6, so it acts more like a router
which is beyond normal switching hardware can do.
A standard solution is to add static routes to these foreign subnets. All Layer 3 switch subnets should use its IP address as the gateway.
In the case of a VPN concentrator, use the IP of the concentrator as the default gateway for all the networks aggregated by that VPN
concentrator.
Firewall DMZ
38
Servers in the demilitarized zone (DMZ) are accessible from the internet. Servers inside this zone, such as mail servers, for example, may be
configured to access certain servers within an internal network with their own security rules set up. The Barracuda Web Filter should not be
deployed to protect these machines. The Barracuda Web Filter is not designed to protect servers but, rather, to protect end user
machines.
Internal Servers
In most organizations, internal servers are protected by corporate firewalls that use port forwarding rules to limit access to the servers.
Port forwarding rules define the ports that can be used to access the servers (such as HTTP, FTP, and mail servers). These servers
should have optimal response time.
As a result, the server traffic must not be interrupted. Barracuda Networks recommends that you exempt or bypass these servers from
the Barracuda Web Filter. To reduce Layer 2 bridging overhead, place a switch between the firewall and the Barracuda Web Filter and
connect your server farm on a different port on the switch. In this case, set up the servers parallel to the Barracuda Web Filter instead of
behind it, and then configure the IP and Port Exemptions feature on the BLOCK/ACCEPT > IP Block/Exempt page to exclude these
IP addresses from filtering
Caching and the Current Time Setting
Caching provides faster access to repeatedly requested content by storing content locally on the Barracuda Web Filter. Data is handled using an
LRU (Least Recently Used) algorithm. You can enable or disable content caching, and specify domains to exempt from content caching, on the A
DVANCED > Caching page. Note that the time value entered in the Current Time field on the BASIC > Administration page must be accurate
since the Barracuda Web Filter uses the current time to ensure accurate cache updates.
QoS/Packet Reconfiguration (Quality of Service, Packet Shapers)
There are many products available that can control traffic in a LAN environment, specify priorities, and size these different traffic types. Normally,
this is done using a Layer 7 device on different types of applications. The Barracuda Web Filter deployment is affected when the Barracuda Web
Filter is placed in front of these devices to benefit from the shaped data. Place the Barracuda Web Filter close to the Internet to help reduce noise
and overhead on both the Layer 2 bridging and HTTP proxy.
Mounting and cabling considerations
To install the Barracuda Web Filter you need to:
Mount it on a rack or shelf, unless you have a desktop model and don't need to rack it.
Cable it to other network devices
The Barracuda Web Filter is designed to be installed in a data center with other networking devices and servers. Depending on the model, its
dimensions are suitable for a 19-inch rack, or can be adapted to a rack with the mounting kit. You must position it within cabling distance of any
switches or other devices that access the network segments that you want to protect. The appliance can be mounted facing either direction in
your rack, so consider which side will have access to the ports. You may need access to the ports during installation, and you may need to use
the back panel during initial configuration.
Continue with Step 2: Installation.
Using Static Routes
en
For an inline deployment, static routes are necessary to enable the Barracuda Web Filter to protect any client machines that are at IP addresses
outside of the native subnet of the Barracuda Web Filter.
For example, suppose your Barracuda Web Filter is assigned the IP address 172.20.0.6 and a subnet mask of 255.255.255.0
If you needed to create a static route to reach client machines in the 192.168.2.x range, the Netmask value would need to be 255.255.
255.0 .
If you needed to create a static route to reach client machines in the 192.x.x.x range, the Netmask value would need to be 255.0.0.0 .
In both cases, the IP/Network Address would need to be outside the 172.20.0.x network of the Barracuda Web Filter, and the Gateway Address
would need to be inside 172.20.0.x.
To use static routing, from the BASIC > IP Configuration page, you would set up the following:
39
IP/Network Address - IP address of a host or network located outside of the native subnet of the Barracuda Web Filter.
Netmask - Subnet mask for the destination host or network.
Gateway Address - IP address of the next hop that can be used to reach the destination host or network. When the Barracuda Web
Filter receives ingress web traffic for client machines in the specified IP range, it forwards the packets to the router at the IP address you
specify in this field. Therefore, this IP address must be on the same subnet as the Barracuda Web Filter. If another IP address is used
outside the range of the Barracuda Web Filter, there could be latency issues because the Barracuda Web Filter is a layer 2 device and
does not route traffic.
Note: The core switch or router typically contains routing statements for the entire network.
Step 2: Installation
en
Checklist for Unpacking
Before installing your Barracuda Web Filter, make sure you have the following equipment:
Barracuda Web Filter (check that you have received the correct model)
AC power cord
Ethernet cables
Mounting rails and screws (available for the Barracuda Web Filter 610, 810, and 910 only)
VGA monitor (recommended)
PS2 keyboard (recommended)
Install the Barracuda Web Filter
1. If you have a desktop Barracuda Web Filter, you do not need to install it in a rack, but if you wish to do so, use the rack-mount kit (sold
separately) for Rack Installation.
2. Fasten the Barracuda Web Filter to a standard 19-inch rack or other stable location. Do not block the cooling vents located on the front
and rear of the unit or, for the Barracuda Web Filter 210, the top of the unit.
3. Connect a CAT5 Ethernet cable from your network switch to the LAN port on the back of your Barracuda Web Filter 210, or to the front of
your Barracuda Web Filter 310 and higher, as shown in the following figure.
Figure 1: Connecting the Barracuda Web Filter 310 and higher to your network.
40
The Barracuda Web Filter supports 10BaseT, 100BaseT and, on the 610 and higher, 1xGigabit Ethernet.
If your switch records the MAC address of an external device, make sure you delete all pre-existing MAC address records from your
switch.
Do not connect any other cables to the unit. The connectors on the back panel are for diagnostic purposes.
3. Connect the following hardware to your Barracuda Web Filter:
Power cord
VGA monitor
PS2 or USB keyboard
After you connect the AC power cord, the Barracuda Web Filter may power on for a few seconds and then power off. This is standard
behavior
4. Press the Power button located on the front of the unit. The login prompt for the administrative console displays on the monitor and the
power light on the front of the Barracuda Web Filter turns on.
Configure the IP Address and Network Settings
The Barracuda Web Filter is assigned a default IP address of 192.168.200.200. You can change the address in one of three ways:
Use the administrative console as described below.
Press and hold the RESET button on the front panel. Holding RESET for eight seconds changes the IP address to 192.168.1.200.
Holding the button for 12 seconds changes the IP address to 10.1.1.200.
Log into the web interface as described in Step 3: Configure the Barracuda Web Filter and change it on the BASIC > IP Configuration p
age.
Choose an IP address that is on the same subnet as the devices connected to the WAN and LAN ports of the appliance.
To set a new IP address from the administrative console:
41
1. With your keyboard and monitor connected directly to the Barracuda Web Filter, at the barracuda login prompt, enter admin for the login
and admin for the password. The User Confirmation Requested window displays the current IP configuration of the Barracuda Web
Filter.
2. Using your Tab key, select Change and click Enter to change the IP configuration.
3. Enter the new IP Address and Subnet Mask for your Barracuda Web Filter. For proper Default Gateway setup, note that the Default
Gateway is the IP address of the next outbound hop from the Barracuda Web Filter, which sends all egress traffic to this gateway via the
WAN port. For Forward Proxy deployment, use the same Default Gateway that is used by hosts on the network. Your firewall must be on
the same subnet as the Barracuda Web Filter.
4. The Primary DNS and Secondary DNS fields are required to resolve to Barracuda support servers upon initial setup to log into the
administrative web interface.
5. Select Save to enter your changes.
6. Select Exit.
The new IP address and network settings are applied to your Barracuda Web Filter.
Configure Your Corporate Firewall
If your Barracuda Web Filter is located behind a corporate firewall, refer to the table below for the ports that need to be opened on your corporate
firewall to allow communication between the Barracuda Web Filter and remote servers.
Port
Direction
Protocol
Description
22
In/Out
TCP
Remote diagnostics and
technical support services
25
Out
TCP
Email and email bounces
53
Out
TCP/UDP
DNS (Domain Name Server0
80
Out
TCP
Virus, spyware, category
definition updates, and firmware
updates
123
In/Out
UDP
NTP (Network Time Protocol)
8000
In/Out
TCP
See Initial Configuration of the
System.
8002
In/Out
TCP
Synchronization between linked
systems. For more information,
see
High Availability - Clustering the
Barracuda Web Filter
In addition to the ports listed above, you may have to configure your corporate firewall to allow the Barracuda Web Filter to email system alerts
and reports. Some organizations create firewall rules that only allow emails to be sent from the IP address of their email server. In this case, you
should configure your corporate firewall to allow emails to be sent from the Barracuda Web Filter as well.
If your Barracuda Web Filter is located in a DMZ, you may need to configure your corporate firewall to allow the Barracuda Web Filter to send
notifications to your internal email server.
Continue with Step 3: Configure the Barracuda Web Filter.
Step 3: Configure the Barracuda Web Filter
en
After choosing the IP address of the Barracuda Web Filter and opening the necessary ports on your corporate firewall, configure the Barracuda
Web Filter from the web interface per the instructions below. Make sure the computer from which you are configuring the Barracuda Web Filter is
connected to the same network and that the appropriate routing is in place to allow connection to the Barracuda Web Filter’s IP address via a web
browser.
In this article:
42
en
Understanding Operating Modes
Configure the Barracuda Web Filter
Activate Your Subscriptions
Product Activation
Update the Barracuda Web Filter Firmware
Update Definitions
Understanding Operating Modes
Before you configure the Barracuda Web Filter to filter traffic, it is recommended to become familiar with the possible operating modes and how
they affect which traffic can be filtered and blocked. For initial configuration with an inline deployment, you should set the Operating Mode to Audi
t from the BASIC > IP Configuration page, and note how traffic is logged.
Operating modes include:
Active - The Barracuda Web Filter actively protects your network by detecting spyware-infected machines on your network, using
transparent HTTP proxy scanning to block and log non-HTTP spyware traffic, and using filters to block and log web traffic that conflicts
with your organization's Internet usage policy. Note: In this mode, the system operates in Active Bridging Mode to manage connections
between network devices and the Barracuda Web Filter.
Audit - In this mode, for an inline deployment, HTTP traffic is logged but not blocked, and downloads over HTTP will NOT be scanned for
viruses or spyware. Use this mode to preview how your currently configured Internet policies would be applied, but without disturbing
production traffic. For forward proxy deployments, traffic is logged and policies are applied, just as in Active mode.
For non-HTTP traffic, the following configured policies DO apply:
Application blocking
IP Block/Exempt rules (Exempt traffic is logged)
Outbound spyware activity is blocked
For non-HTTP traffic, the following does NOT apply:
Content Filter settings
MIME-type blocking
Domains - blocked and allowed rules
URL Patterns - logged only
Categories - logged only
Exceptions
In Audit mode, access to spyware sites and spyware downloads is not blocked but is logged. Note: If the Barracuda Web Filter is deployed
as a web traffic monitoring device (as opposed to a web traffic filtering device), the system monitors traffic sent through any mirrored
(spanned) port on your switches.
Safe - This mode can only be entered automatically by the Barracuda Web Filter and is not configurable via the web interface. When the
System Load exceeds normal thresholds for an extended period, as indicated on the BASIC > Status screen, the device shifts to Safe
mode until the System Load returns to normal levels. Note: In this mode, traffic is neither filtered nor logged. Safe mode does not
apply if the Barracuda Web Filter is deployed in a WCCP configuration.
Configure the Barracuda Web Filter
1. From a web browser, enter the IP address of the Barracuda Web Filter followed by port.
For example: http://192.168.200.200:8000
2. To log into the web interface, enter admin for the username and admin for the password. Select the BASIC > IP Configuration page
and perform the following steps. Click the Help button on the right side of each section title for additional online help.
a. Enter the IP address of your Barracuda Web Filter that you chose in the steps above. Enter the Subnet Mask that is used to
define this area of your network, and the Default Gateway, which is the IP address of the next outbound hop from the Barracuda
Web Filter. The Barracuda Web Filter sends all egress traffic to the default gateway via the WAN port on the front of the
appliance.
b. Enter the IP address of your primary and secondary DNS servers (if these have not yet been set up).
c. Set Operating Mode to Audit.
d. Set Enable Proxy on WAN to No to protect against WAN-side proxy requests if the Barracuda Web Filter is deployed outside of
the corporate firewall.
e. Enter the Default Hostname which will be displayed in alerts, notifications, and messages sent by the Barracuda Web Filter.
f. Enter the Default Domain which will be displayed in alerts, notifications, and messages sent by the Barracuda Web Filter.
g.
43
g. Click Save Changes.
If the IP address of your Barracuda Web Filter on the BASIC > IP Configuration page is changed, you are disconnected from the web
interface. If this occurs, log in again using the new IP address.
Activate Your Subscriptions
After installation, your Energize Updates and other optional subscriptions must be activated for the Barracuda Web Filter to be fully enabled and
to continue to receive the latest updates to all spyware, virus and category definitions from Barracuda Central. The Energize Updates service is
responsible for downloading these updates to your Barracuda Web Filter.
Product Activation
1. At the top of every page, you may see the following warning:
2. Click on the designated link to open up the Product Activation page in a new browser window.
3. On the Product Activation page, fill in the required fields and click Activate. A confirmation page opens to display the terms of your
subscription.
4. Return to the Barracuda Web Filter web interface and navigate to the BASIC > Status page. In the Subscription Status section, verify
that the word Current appears next to Energize Updates, Instant Replacement Service (if purchased) and Premium Support (if
purchased):
There may be a slight delay of a few minutes for the display to reflect your updated subscription status. If the status is still showing as not
activated, click Refresh in the Subscription Status section.
If your subscription status does not change to Current within an hour, and you have ensured that all required network ports are open, or
if you have trouble filling out the Product Activation page, please call your Barracuda Networks sales representative.
Update the Barracuda Web Filter Firmware
Prior to upgrading the firmware on your Barracuda Web Filter, it is always recommended that you read the release notes. To update the firmware
on the Barracuda Web Filter:
1. From the web interface, select ADVANCED > Firmware Update.
2. Read the release notes to learn about the latest features and fixes provided in the new firmware version.
3. Click Download Now next to Latest General Release. Download Now is disabled if the Barracuda Web Filter is already up-to-date with
the latest firmware version.
The Barracuda Web Filter begins downloading the latest firmware version. You can view the download status by clicking Refresh. A
message displays once the download is complete. It is important to not power-cycle the unit during the download.
Updating the firmware may take several minutes. Do not turn off the unit during this process.
4. Click Apply Now when the download completes. The Barracuda Web Filter will apply the firmware and automatically reboot. It is
44
4.
important to not power-cycle the unit during this process. A Status page displays the progress of the reboot. Once the reboot is
complete, the login page appears.
Update Definitions
To apply the newest definitions provided by Energize Updates:
1. Select ADVANCED > Energize Updates.
2. Select On for Automatically Update. The recommended setting is On for all available definitions.
3. Check to see if the current version is the same as the latest general release. If the rules are up-to-date, proceed to the next section. If the
rules are not up-to-date, continue to the next step.
4. Click Update to download and install the latest available definitions onto the Barracuda Web Filter.
Continue with Step 4: Configure and Secure the Web Interface.
Step 4: Configure and Secure the Web Interface
en
In this article:
en
Controlling Access to the Web Interface
Customizing the Appearance of the Web interface
Enabling SSL for Administrators and Users
Controlling Access to the Web Interface
Use the BASIC > Administration page to perform the following tasks for initial setup:
1. Assign a new administration password to the Barracuda Web Filter (optional). This step is highly recommended.
2. Make sure the local time zone is set correctly. Time on the Barracuda Web Filter is automatically updated via NTP (Network Time
Protocol). It requires that port 123 is opened for inbound and outbound UDP (User Datagram Protocol) traffic on your firewall (if the
Barracuda Web Filter is located behind one).
It is important that the time zone is set correctly because this information is used to determine the delivery times for messages and is
displayed in certain mail reading programs. The current time is also used to deliver accurate cache updates if caching is enabled (see the
ADVANCED > Caching page).
3. If desired, change the port number used to access the Barracuda Web Filter Web interface. The default port is 8000.
4. Enter the amount of time for the Session Expiration Length (in minutes) of your Web interface session. If the session expires, you are
required to log back into the web interface.
5. Specify your local SMTP server information. Enter the email address for your Administrator to receive system and threat email alerts and
notifications.
6. Click Save Changes.
Customizing the Appearance of the Web interface
The ADVANCED > Appearance page allows you to customize the default images used on the web interface. You can also give the Barracuda
Web Filter a name (e.g. “Science Library Web Filter”) that will appear in the login page above the login panel that contains the Language selector
and the Username and Password prompts. The ADVANCED > Appearance page is only displayed on the Barracuda Web Filter 410 and above.
Changing the Language of the Web Interface
You can change the language of the web interface by selecting a language from the drop-down menu in the upper right corner of the page near
the Log Off link and the breadcrumbs. Supported languages include Chinese, Japanese, Spanish, French, and others. The language you select
is only applied to your individual web interface. No other user’s web interface is affected.
Enabling SSL for Administrators and Users
SSL (Secure Socket Layer) ensures that your passwords are encrypted and that all data transmitted to and received from the web interface is
encrypted as well. All Barracuda Web Filters support SSL access without any additional configuration. However, some sites may wish to enforce
using a secured connection to access the web interface, or prefer to use their own trusted certificates.
To enforce SSL-only access:
1. On the ADVANCED > Secure Administration page, select Yes to enable HTTPS/SSL Access Only to the web interface. Setting this to
45
1.
No will still allow the Barracuda Web Filter to accept non-SSL connections.
2. Enter your desired Web Interface HTTPS/SSL port for the web interface. The default is 443.
3. Click Save Changes.
If you wish to change the certificate that is used, you can either create a self-signed certificate or upload a certificate you purchase from a trusted
Certificate Authority (CA) to the Barracuda Web Filter. Changing the Certificate Type in the SSL Certificate Configuration section of the ADVA
NCED > Secure Administration page allows you to either create a self-signed certificate with your organization information, or create a
Certificate Signing Request (CSR) to purchase a trusted certificate. Click the Help button on the ADVANCED > Secure Administration page for
instructions to create and/or upload a certificate. The Barracuda Web Filter supports the following types of certificates:
Default (Barracuda Networks) certificates are signed by Barracuda Networks. On some browsers, these may generate some benign
warnings which can be safely ignored. No additional configuration is required to use these certificates, which are provided free of charge
as the default type of certificate.
Private (self-signed) certificates provide strong encryption without the cost of purchasing a certificate from a trusted Certificate Authority
(CA). These certificates are created by providing the information requested in the Private (self-signed) section of the page. You may
also want to download the Private Root Certificate and import it into your browser, to allow it to verify the authenticity of the certificate and
prevent any warnings that may come up when accessing the web interface.
Trusted (signed by a trusted CA) certificates are issued by trusted Certificate Authorities (CA), and must be purchased from them
separately with a Certificate Signing Request (CSR). The CSR can be downloaded from the Barracuda Web Filter after providing the
information requested in the Trusted (Signed by a trusted CA) section of the page. Once you have received the certificate and key from
the CA, you must upload both items to the Barracuda Web Filter from this section of the page. The certificate will be in effect as soon as
the upload is complete.
Continue with Step 5: Connect the Barracuda Web Filter to Your Network.
Step 5: Connect the Barracuda Web Filter to Your Network
en
To connect the Barracuda Web Filter inline to your network:
1. Connect the Ethernet cable from your corporate firewall to the WAN port on the front panel of the Barracuda Web Filter. This step may
require disconnecting your internal network switch from the corporate firewall. A crossover cable may be needed if your corporate firewall
does not have a switchable port and therefore cannot switch between RX and TX. Another solution is to place a switch between the
corporate firewall and the Barracuda Web Filter. You do not need to configure the WAN port. The Barracuda Web Filter creates an
Ethernet bridge between the WAN and LAN ports.
2. Connect the LAN port of the Barracuda Web Filter to your internal network switch, router or hub.
46
3. Select the BASIC > IP Configuration page in the web interface, and set the Operating Mode to Active.
For a forward proxy deployment, connect either the WAN or LAN port of the Barracuda Web Filter to the same switch as the network gateway
(just one network hop away). Configure your clients’ HTTP proxy settings from their browser to access the Internet. See Forward Proxy
Deployment of the Barracuda Web Filter for more information.
If necessary, set up Static Routes on the BASIC > IP Configuration page. Setting up static routes is often necessary in complex networks so that
the Barracuda Web Filter knows the proper way to route traffic on your network.
Static routes are generally necessary to enable the Barracuda Web Filters to protect any client machines that are at IP addresses outside of the
native subnet of the Barracuda Web Filter.
For example, if the Barracuda Web Filter is assigned an IP address of 172.20.0.6 and a subnet mask of 255.255.255.0 and uses the default
gateway at 172.20.0.9, you will need to create a static route to reach client machines in the 192.168.2.x range with a Netmask value of
255.255.255.0. The Gateway Address should be inside 172.20.0.x.
Test and adjust the Barracuda Web Filter
After connecting your Barracuda Web Filter to the network, verify connectivity. Open your web browser from a machine on your network. If you
cannot browse the web, review the installation steps to make sure your Barracuda Web Filter is properly configured and connected to your
corporate firewall and network switch.
If you can browse the web without any issues, you are ready to adjust the settings on the Barracuda Web Filter. The most common adjustment to
make is to create filters that determine what traffic and applications the Barracuda Web Filter blocks and accepts. For more information about the
available filters, refer to Monitoring the System.
Go to the BLOCK/ACCEPT > IP Block/Exempt page and use the IP and Port Exemption section to bypass scanning or filtering for clients or
targeted servers. To avoid accidentally specifying a broader than intended exemption range, be sure to apply the proper subnet mask.
47
Barracuda Web Filter 30 Day Evaluation Guide
en
Where to start
Please begin with the Barracuda Web Filter Quick Start Guide. This guide is also included as a 2-sided 8.5 x 11" card included with your
Barracuda Web Filter and will guide you in safe installation and initial configuration of your Barracuda Web Filter. If you have the Barracuda Web
Filter Vx virtual appliance, start with Virtual Deployment, then return to this page for hints and guidelines for your 30 day evaluation process.
If you have a model 610 or higher, you automatically have a Barracuda sales engineer assigned to help you make the most of your 30
evaluation of the Barracuda Web Filter. Simply call your reseller or sales representative if you have not yet been contacted by a sales
engineer.
Evaluation Methodology
When evaluating the Barracuda Web Filter, it is preferable to address two aspects separately:
Functional testing
Sizing for production environment: Size the Barracuda Web Filter based on throughput, concurrent users and active TCP connections.
Use the BASIC > Status page to view and monitor these statistics.
It is recommended that you first evaluate device functionality on a sub-set of network traffic before deploying the Barracuda Web Filter in a
production environment. This will allow you to characterize your network better and familiarize yourself with the product before addressing
production concerns.
Common Use Cases
Use Case: Reporting
1. If possible, deploy the Barracuda Web Filter inline as described in Inline Pass-Through (Transparent) Mode Deployment. This
deployment does not require setting a proxy in client browsers. You can either set up the Barracuda Web Filter inline with your computer
for initial testing, or follow steps 3 and 4 to configure users and authentication for testing policies.
2. Set the Barracuda Web Filter Operating Mode on the BASIC > Administration page to Audit. This mode logs traffic but doesn't warn or
block users from accessing any URL. In Audit mode, for inline deployments, HTTP traffic is logged but not blocked, and downloads over
HTTP are NOT scanned for viruses or spyware. Use this mode to preview how your currently configured Internet policies would be
applied, but without disturbing production traffic. In Forward Proxy deployment, Audit mode works just like Active mode; traffic is logged
and policies are applied.
3. Configure authentication as needed using your LDAP server, Kerberos or NTLM. See How to Choose Your Authentication Mechanisms f
or more information and to get started.
4. Create a set of Users and Groups if you want to assign block and allow policies to Authenticated users.
5. Use the filters on the BLOCK/ACCEPT pages to set policies for what you want to block, monitor, warn users about, or allow in web traffic
for Authenticated or Unauthenticated users. See Best Practices in Configuring Policy for guidelines in setting up your traffic filtering
policies.
6. After you have had the Barracuda Web Filter running for awhile, run reports on user activity, bandwidth usage, most visited domains, and
other metrics from the BASIC > Reports page.
7. After reviewing reports, you'll have a good idea of what browsing activities or web 2.0 applications you want to warn, monitor, block or
allow. Use the BLOCK/ACCEPT pages to adjust policies according to your organization's needs.
8. When you are ready to begin blocking specific web traffic, set the Barracuda Web Filter Operating Mode on the BASIC > Administration
page to Active.
Use Case: Social Media Regulation and Monitoring
The Barracuda Web Filter 610 and higher enables granular control over Web 2.0 applications running over HTTPS. For example you can allow
access to Facebook messages but block games, chat, posts etc. You can provide safe access to YouTube videos that provide rich educational
content using your YouTube for Schools account. Since many social media applications such as Facebook and Google Apps typically run over
HTTPS, you must configure the SSL Inspection feature on the Barracuda Web Filter, which is available on the 610 and higher. It is
recommended to work with your sales engineer to configure SSL Inspection.
With the Web Application Monitoring feature and SSL Inspection, you can capture and archive the content of social media interactions.
1.
48
1. For the Barracuda Web Filter 610 and 810, use the Forward Proxy Deployment if you are using SSL Inspection to regulate/monitor
applications over HTTPS. With the Barracuda Web Filter 910 and above, you can also use SSL Inspection with Inline Deployment and W
CCP Deployment.
2. Follow steps 2-5 above.
3. See the BLOCK/ACCEPT > Web App Monitor page in the Barracuda Web Filter web interface to configure. See How to Configure Web
Application Monitoring for more information and examples.
For schools, using SSL Inspection and Web Application Monitoring provides powerful benefits with common use cases such as these:
Google Apps Control Over HTTPS - Granular regulation of Google Apps tools over HTTPS (Business Gmail as opposed to personal
Gmail, and more)
Facebook Control Over HTTPS - Granular regulation of Facebook applications (chat, posting, games, etc.)
Alert authorities of emerging cases of cyberbullying, harassment, or loss of confidential data using the Suspicious Keyword Tracking feat
ure. Monitor social messaging in real time, with keyword alert emails to teachers or administrators. This feature does not require the use
of SSL Inspection unless you want to monitor HTTPS traffic content, and is available on the Barracuda Web Filter 610 and higher.
With the Barracuda 210, 310 and 410, you can block or allow websites and subdomains as well as some applications, but you cannot capture the
content of social media interactions as described above. To simply block or allow applications like Facebook Games, Flickr upload, LinkedIn
Email and many more, see the BLOCK/ACCEPT > Web App Control page in the web interface.
Use Case: Remote Filtering for Students and Offsite Users
Remote Filtering with the Barracuda Web Filter enables your IT department to provide and control content security beyond the perimeter of the IT
infrastructure. To learn about options for managing and applying filtering policies to remote laptops, iOS devices and other computers, see Filterin
g Traffic for Offsite and Mobile Users.
1. Begin by deploying the Barracuda Web Filter in your network, selecting your authentication mechanism, and testing out policies as
described above.
2. After you have configured and tested block and allow policies and authentication, you're ready to test extending this protection to your
remote laptop or iPad, for example. If your use case is:
Remote laptops, PC and Macintosh computers – Install the Barracuda Web Security Agent on one of these devices, which
synchronizes them with the Barracuda Web Filter policies. See Barracuda Web Security Agent - How it Works and How to Install
the Barracuda WSA With the Barracuda Web Filter to get started.
Students with school issued iPads – You can either install the Barracuda Safe Browser or use the Global HTTP Proxy tool from
Apple Inc. to direct traffic from the iOS device to the Barracuda Web Filter.
3. Test your block and allow policies with one remote device before extending to all remote devices.
For use case examples specific to students, see:
Facebook Control Over HTTPS
Google Apps Control Over HTTPS
Barracuda Web Filter for Education
Creating Exceptions to Policies
If you want to exempt certain users from block and allow policies, such as HR, Finance, Students, Teachers, etc.:
1.
2.
3.
4.
Create users and assign them to groups of users on the USERS > Users and Groups pages.
Set up your authentication mechanism as described above for users and groups.
Use the BLOCK/ACCEPT pages as described above to create policies.
Use the BLOCK/ACCEPT > Exceptions page to create exceptions to policies. See Exception Policies for more information and
examples.
Social media application such as Facebook and Google Apps typically run over HTTPS
Managing Policies
en
Begin creating filtering policies which you can assign to specific users and/or groups by following recommended Best Practices in Configuring
Policy. The BLOCK/ACCEPT pages in the web interface provide a wide range of filters that enhance the default spyware and virus detection
capabilities of the Barracuda Web Filter. Note that application filtering is supported by the Barracuda Web Filter appliance, but not by the
Barracuda Web Filter Vx virtual machine.
49
In this Section
Best Practices in Configuring Policy
Web and Desktop Application Control With the Barracuda Web Filter
BLOCK/ACCEPT Order of Precedence - Barracuda Web Filter
Block Messages
Creating Block and Accept Policies
Using Custom Categories
Exception Policies 6.x
Exception Policies 7.x
Barracuda Web Filter for Education
How to Set Up YouTube for Schools
How to Enable Safe Search for Students 7.1
How to Enable Safe Search for Students 6.x
Suspicious Keyword Tracking
Temporary Access for Education
How to Use Temporary Access for Students - Teacher's Guide
How to Configure Web Application Monitoring
Using SSL Inspection With the Barracuda Web Filter
Google Apps Control Over HTTPS
Facebook Control Over HTTPS
YouTube Control Over HTTPS 7.x
Captive Portal Terms and Conditions Page
Creating Block and Accept Policies - with Safe Search info
Data Pattern Categorization and the Barracuda Web Filter
Best Practices in Configuring Policy
en
Begin creating filtering policies which you can assign to specific users and/or groups by following the best practices listed below.
The BLOCK/ACCEPT pages in the web interface provide a wide range of filters that enhance the default spyware and virus
detection capabilities of the Barracuda Web Filter. Note that application filtering is supported by the Barracuda Web Filter
appliance, but not by the Barracuda Web Filter Vx virtual machine.
Users and Groups for Authentication
You can apply domain, IP address, pattern, content, application, and MIME type
blocking filters to authenticated and/or unauthenticated users. The first step in creating
your policy should be deciding which categories your users will not be allowed to visit (
Adult Content, Game Playing & Game Media, Streaming Media, etc.). You can later
override this policy using exception policies to grant either additional or more restrictive
access for individual users or groups. Before you create or modify a filter, make sure to
use the drop-down menu on the right side of the web interface page to select which
type of user you want the filter applied to (authenticated or unauthenticated).
Use the USERS/GROUPS pages to manage users and authentication.
Related Articles
Creating Block and Accept Policies
Managing Policies
Exception Policies 7.x
Exception Policies for Specific Access
Exceptions are useful for creating policies that allow a subset of your users to access content that is blocked for other users. On the BLOCK/ACC
EPT > Exceptions page, you can create policies to override filters you have created on a per-user or group basis. For example, if you configure
your content filters to block access to auction sites for both authenticated and unauthenticated users, but a member of your purchasing
50
department requires access to these sites, you can create an exception policy that allows access to only this user. Or you could create an
exception for the entire purchasing department (a 'Group') using the LDAP organizational unit in your Active Directory server.
Exception policies are applied in the order in which they are listed in the table on the BLOCK/ACCEPT > Exceptions page of the web interface.
You can drag and drop exceptions to re-order them in the table. See Exception Policies 7.x for details.
Block Pages and Authorized Logins
When a user tries to access content that is blocked by one of the assigned filters, the user receives a block message (see Figure 1 below) that
may contain login fields, depending on how you configure authentication on your Barracuda Web Filter. If you want to hide the login fields
because you have not created any exception policies that allow users to bypass the block filter, go to the BLOCK/ACCEPT > Configuration pag
e and change the Enable Login Override of Block Pages setting to No. Note that remote users who access the Barracuda Web Filter via the
Remote Filtering (WSA) feature or via the Barracuda Safe Browser on their mobile devices will not see login fields on block pages.
Figure 1: Block Message with Login Fields
The Barracuda Web Filter will recognize specific types of block and accept rules in the order they are listed (from top to bottom). If conflicting rules
are created, the rule listed first will be honored. Whitelist or “allow” rules take precedence over block rules of the same type. The different rules,
51
configured under the BLOCK/ACCEPT tab, are applied in this order:
1.
2.
3.
4.
5.
6.
7.
IP Block/Exempt
Exceptions
Applications
MIME Type Blocking
Domains
URL Patterns
Content Filter
Policy Alerts: You can specify email alerts to be sent to an administrator or other roles when one or more users violate content filtering policies
(Block, Warn or Monitor Actions) more than a specified number of times. See Policy Alerts for more information.
Web and Desktop Application Control With the Barracuda Web Filter
en
Desktop Applications Verus Web-Based Applications
The Barracuda Web Filter offers administrators control over both desktop and web
based applications. Common desktop applications include iTunes, Real Player and
Jabber, which use both standards based and proprietary communication protocols.
Web based applications include Facebook and LinkedIn and are primarily presented
through a web browser. This article defines how the administrator can create
block/allow policies and archive social media interactions with the Barracuda Web
Filter.
Managing Desktop (Non Web-Based) Applications
In the case of desktop applications, the Barracuda Web Filter enables administrators to
define block/allow policies on popular applications using the BLOCK/ACCEPT >
Applications page. For instance, file sharing sites such as BitTorrent and
communication apps such as AOL IM can be blocked as per corporate policy. These
policies can be defined against authenticated and unauthenticated users to offer more
access to a given set of users.
Related Articles
Creating Block and Accept Policies
Managing Policies
Exception Policies 7.x
Configure Web Application
Monitoring
Application Filtering for Non Web
Based Applications
Further, entire protocols can be blocked such as FTP, POP, and SSH. See Application Filtering for Non Web Based Applications.
Managing Web-Based Applications
The Web Application Control feature offers administrators fine grained control over web applications. What this means is that administrators can,
for example, block certain portions of web based applications such as Facebook Chat and Facebook Sharing while allowing users access to the
rest of Facebook. With this control the administrator can define what they deem permissible on their network without having to block all of
Facebook. For example, as shown in Figure 1 below, the Facebook Twitter app and Games have been added to the list on the right of Blocked
Applications. See the BLOCK/ACCEPT > Web App Control page for more information and to configure.
Figure 1. Facebook is generally allowed, but the Facebook Twitter app and Games have been blocked by the administrator.
52
Monitoring Social Media Content
A powerful feature for meeting CIPA requirements and protecting students is the Web Application Monitoring function. This feature captures web
activities such as comments and posts and packages the content in SMTP messages for email notifications and/or archiving. The monitoring
feature allows administrators to track suspicious keywords that may signal potentially harmful behavior from a particular user. For more
information about this feature, see How to Configure Web Application Monitoring. To configure, see the See the BLOCK/ACCEPT > Web App
Monitor page in the Barracuda Web Filter web interface.
The Barracuda Web Filter receives periodic updates to its application and web application definitions to quickly react to the dynamics of the
market. Additionally, the Barracuda Web Filter 610 and higher supports SSL inspection, which enables the Barracuda Web Filter to control and
monitor apps that communicate over HTTPS. The Barracuda Web Filter 410 supports SSL Inspection only for Safe Browsing and YouTube For
Schools. See Using SSL Inspection With the Barracuda Web Filter and How to Configure SSL Inspection for details.
BLOCK/ACCEPT Order of Precedence - Barracuda Web Filter
en
The BLOCK/ACCEPT pages in the Barracuda Web Filter web interface provide a wide
range of filters that enhance the default spyware and virus detection capabilities of the
Barracuda Web Filter. Note that application filtering is supported by the Barracuda
Web Filter appliance but not by the Barracuda Web Filter Vx virtual machine. See
also Best Practices in Configuring Policy for guidelines on planning and creating your
Block/Accept rules, and Creating Block and Accept Policies for details on filters
available.
Order of Precedence of Block/Accept Rules
The Barracuda Web Filter will recognize specific types of block and accept rules in the
order they are listed below (from top to bottom). If conflicting rules are created, the rule
listed first will be honored. Whitelist or Allow rules take precedence over Block rules of
the same type.
Related Articles
Best Practices in Configuring Policy
Exception Policies 6.x
Exception Policies 6.x
Creating Block and Accept Policies
Web Use Categories
1. BLOCK/ACCEPT > IP Block/Exempt - Use this section to exempt traffic from all filtering - including spyware filtering - based on IP
address criteria. You can exempt certain ports, portions of your network, or external application servers.
2. Temporary Whitelist - This applies to websites which administrators or teachers request to allow for access by students, employees,
53
2.
etc. for a temporary time period, as specified with the Temporary Access tool.
3. BLOCK/ACCEPT > Exceptions - Use the Exceptions page to manage policy exceptions for specific users or groups. An exception rule
grants selected users - local users or groups, domain users or groups, or all users (authenticated or unauthenticated) - exceptions to a
Barracuda Web Filter policy for a specific period of time.
4. BLOCK/ACCEPT > Applications - Available for Inline deployments only. Use this feature to block or allow specific application traffic.
You can select from a pre-defined list of non-HTTP web applications including IM clients, media programs, common PC tools, software
updates, and peer-to-peer software.
5. BLOCK/ACCEPT > MIME Type Blocking - Use the MIME Type Blocking page to blacklist standard MIME types. You can create a
MIME type blacklist for either unauthenticated or authenticated users. These rules are useful when content is not easily blocked by other
methods.
Note the mimetype blocking only applies to HTTP responses, and therefore will not be observed for requests that are blocked
due to other rules, including category-based content filtering.
6. BLOCK/ACCEPT > Domains - Use this section to specify a domain that should be blocked, warned, or monitored. This blocking filter will
operate in addition to those defined in other filtering categories.
7. BLOCK/ACCEPT > URL Patterns - Use this section to specify a pattern or keyword to match parts of a URL that should be blocked,
warned, or monitored.
8. BLOCK/ACCEPT > Content Filter - Use the Content Filter page to manage your users' Internet access based on the web site content
being requested. You can apply content category filters to either unauthenticated or authenticated users.
Barracuda does not recommend using IP block/exempt rules for blocking traffic to websites or for specific applications. IP block/exempt
rules are generally used to control access to and from particular client computers or external web servers (such as email servers or
update servers). However, you can use this feature to control access by specifying destination IP/port combinations. Keep in mind that
these rules have precedence over all other block/accept rules.
Block Messages
en
When the Barracuda Web Filter blocks access to a website, it presents a block page with a message that informs the user why that site is being
blocked as shown in Figure 1. The Barracuda Web Filter blocks a website if it contains spyware, a virus, content that has been blocked due to
policies you set, or a blacklisted URL. You can optionally choose to have the Barracuda Web Filter redirect blocked users to any other URL, such
as a custom block page, search engine page, etc. If you are using the Barracuda Web Filter built-in block page, use the BLOCK/ACCEPT >
Block Messages page to perform the following tasks:
Select the language that the block message is displayed in for all users.
Customize the message in case the default text is insufficient.
Figure 1: Block Message with Login Fields.
54
With the Barracuda Web Filter 610 and higher: If you enable the Temporary Access feature for teachers and students to gain access to specific
websites for classroom research, students can enter a token given by the teacher to temporarily bypass block pages. Alternatively, you can allow
teachers to use log in credentials to gain access to those sites for a limited time. See Temporary Access for Education for details about this
feature, which offloads temporary access management from the system administrator to the teacher.
Remote users logged in with the Barracuda Web Security Agent (WSA) will not have the option to bypass block pages with a login.
External Block Page
You can choose to redirect the user to a custom block page which you provide/design (or any URL) instead using the Barracuda Web Filter block
page when a policy prevents the user from accessing a requested website or application. To use this option you must enable the Use External
Block Page feature and specify an External Block Page URL on the BLOCK/ACCEPT > Configuration page.
The Barracuda Web Filter will redirect the blocked user to the URL you specify, which can be your own page/site, a search engine, etc.
Terms and Conditions Page (Captive Portal)
55
Hotels, Internet cafes and BYOD mobile devices are typical use cases for this feature, which provides a portal with a customized Terms and
Conditions page for unauthenticated or authenticated users. The user is required to agree to specified terms and conditions before they can begin
browsing the web via the Barracuda Web Filter, unless the user has LDAP credentials and the correct configuration applies per settings on the BL
OCK/ACCEPT > Configuration page.
See Captive Portal Terms and Conditions Page for details.
Creating Block and Accept Policies
en
This article covers creating block and accept filtering policy. To create exceptions by user, group, time, etc. to the policies you set,
see Exception Policies 6.x.
In this article:
en
Content filtering
Safe Search
Safe Browsing for Schools
Application Filtering
Non Web-Based Applications
Social Media and Other Web-Based Applications
Web Application Monitoring
Domain filtering
URL pattern filtering
Custom categories filtering
MIME type blocking
IP-based exemption
IP-based blocking
Content filtering
Content filtering is becoming increasingly important in most organizations and especially for schools. Controlling access to controversial and
offensive content such as pornography, violence, hacking, and other “fringe” sites has become a necessity. To block access to these sites, the
Barracuda Web Filter includes a preinstalled URL list containing millions of URLs classified into 95 categories for easy and efficient content
filtering. This list is continuously updated by engineers at Barracuda Central and delivered hourly via the Energize Updates subscription service
sold with the Barracuda Web Filter.
Use the BLOCK/ACCEPT > Content Filter page to control user access to categories of websites that should be blocked, warned, monitored, or
allowed based on content. When you block a category, you block all HTTP and HTTPS traffic to the associated URLs in that category.
For example, http://mail.yahoo.com is categorized as a web-based email site. If you want to block users from accessing their web-based email
accounts, block the Web-based Email category.
See Web Use Categories for a listing and definition of content classification.
Safe Search
Safe Search mode prevents a web search engine from displaying objectionable thumbnail images in search results; only filtered thumbnails are
displayed in the search results. To limit Safe Search to specific users, create an exception using the BLOCK/ACCEPT > Exceptions page. For
details, see Safe Browsing / Safe Search - Limiting to Specific Users. The entries in this category include search engines which allow users to
enable or disable Safe Search mode for image searches. If you enable Safe Search through the Barracuda Web Filter, users cannot use the
search engine settings to override this mode. If you only want to enable Safe Search for certain users, select Disable for each search engine
listed in the table, or click the All link. On the BLOCK/ACCEPT > Exceptions page, create an Enable exception for the user or group of users for
whom you want to enable Safe Search.
Note: Because most search engines use HTTPS, you must enable SSL Inspection to use the Safe Search feature. See How to
Configure SSL Inspection to configure.
Safe Browsing for Schools
56
For educational institutions wishing to use YouTube For Schools filtering, the procedure to configure the Barracuda Web Filter to work
with this tool is detailed in How to Set Up YouTube for Schools.
See Temporary Access for Education to give teachers and students temporary access to websites, for classroom research, that are
typically blocked.
Application Filtering
Non Web-Based Applications
Use the BLOCK/ACCEPT > Applications page to block or allow specific application traffic over the HTTP (and HTTPS) protocol that is not
browser-based. For example: Skype, Pandora, Adobe Acrobat, FTP.This type of filtering does NOT scan for content. If you need to scan and filter
content, you must enable SSL Inspection. Note, however, that the SSL Inspection feature is only available on the Barracuda Web Filter 610 and
higher, and requires more system resources and installation of SSL certificates to configure. To block/allow specific functions that run within web
applications, such as Facebook games or Skype chat, configure on the BLOCK/ACCEPT > Web App Control page.
For a user to download or use an application, the user’s application needs to communicate with an external server. When you select to block an
application, the Barracuda Web Filter searches for traffic that contains data associated with an application server and then blocks that traffic.
The Barracuda Web Filter Vx virtual machine does not support application filtering because it cannot be deployed inline, and
application filtering is ONLY supported by inline deployments.
Exceptions to policies can be created for a specific user or group based on bandwidth quotas, time of day and/or days of the week. For example,
you might want to allow employees to access certain applications such as Skype, for example, ONLY during lunch hours. See Limiting Access by
Time frames, Time Quotas and Bandwidth Quotas. You can use the applications filter as a pre-emptive measure to protect your network against
malware.
Social Media and Other Web-Based Applications
From the BLOCK/ACCEPT > Web App Control page you can block or allow specific web-based application traffic. For example: Facebook,
LinkedIn, MySpace, Twitter, and others. You can allow or block the entire application or only specific functions that run within these web
applications. For example, you might allow Facebook, but want to block Facebook games and Facebook apps to protect against viruses and
malware.
As another example, you may want to block the IRC application because this type of application can present a security risk to the network. An
infected PC may communicate with the "hacker" through an IRC channel, and the hacker can send commands to the channel instructing bots to
launch an attack. IRC could also be used by a disgruntled employee to launch attacks on other networks or to communicate sensitive information
outside of the network.
You can also use the application blocking feature when you hear about a virus spreading over a specific IM service or tool. In this case, you can
proactively protect your network from the infection by blocking that particular service until the threat has been resolved.
Web Application Monitoring
Use this feature to capture and archive chat, email, user registrations and other social media interactions. The archiving repository can be your
Barracuda Message Archiver, your Microsoft Exchange Server journaling tool or, for example, a system administrator email address.
For example, you might want to allow users in the organization to use Facebook to view and make status updates and use chat, but you want to
capture the content. You might also want to block games, shares and other Facebook apps to protect your network from viruses and malware.
To configure Web Application Monitoring, you'll want to first set up your block/accept policies for web-based applications. Here's the process for
this example:
1. From the BLOCK/ACCEPT > Web App. Control page, in the Application Navigator, check Facebook to allow some or all Facebook
applications.
2. Select the Facebook actions to block and allow and save your changes. In this example, you'd leave chat and status update in the Allow
ed Applications list, moving other applications you want to block, such as shares, games and other apps, to the Blocked Applications l
ist. Save your changes.
3. From the BLOCK/ACCEPT > Web App. Monitor page, enable the application actions whose content you want to archive. In this example,
you would enable Facebook Wall Posts, Chat Message and Private Message. Once you enable any actions on the page, the Barracuda
57
3.
Web Filter will capture the content from each action, package it as an SMTP message and email it to the Notification Email Address yo
u specify.
Domain filtering
Use the BLOCK/ACCEPT > Domains page to blocklist (block), warn, monitor or whitelist (allow) traffic to specific domains and subdomains. Use
domain whitelists to allow access to domains that belong to categories that are generally blocked. Note that domains that are whitelisted ARE
subject to the MIME type blocking rules you create (see below).Use domain blocklists to restrict access to domains in addition to those specified
in other filtering categories.
Tip
To control access to a domain and all its associated URLs, make sure you enter the domain identifier. For example, www.example.co
m will control access only to the specific URL but example.com will control access to all URLs under the domain.
URL pattern filtering
Use the BLOCK/ACCEPT > URL Patterns page to enter regular expressions or keywords that, if matched to a URL, will block (blocklist), warn,
monitor, or allow (whitelist) that URL. For more information about using regular expressions, refer to Regular Expressions. Note that URLs that
are whitelisted ARE subject to the MIME type blocking rules you create (see below).
Examples:
1. You want to block all websites that contain porn in the URL - enter porn as a blocked pattern. Sometimes spyware applications use
different hostnames but the same domain name, so the URLs appear to be from different hosts. In this case you can enter the domain
name as a pattern to block all URLs on that domain.
2. You want to allow access to example.com but want to block maps.example.com. In this case, specify example.com as an allowed patt
ern and specify maps.example.com as a blocked URL.
Tip
Run a test on your regular expressions with special characters before you encode them in a pattern filter.
Custom categories filtering
Use the BLOCK/ACCEPT > Custom Categories page to create a custom filter, which can consist of the domain names or built-in web content
categories you select. Custom categories are used in the same way as the built-in filters:
You can apply a custom category to either authenticated or unauthenticated users.
You can define a user- or group- specific exception rule to a custom category policy.
After you define a custom category, allow between five and ten minutes for the Barracuda Web Filter to compile and then fully activate the new
category. To verify that a newly created custom category is active, you can use the Content Filter Lookup facility in the BLOCK/ACCEPT
>Content Filter page, as described in the online help for the BLOCK/ACCEPT > Custom Categories page.
MIME type blocking
Use the BLOCK/ACCEPT > MIME Blocking page to specify standard MIME types that you want to block. Note that websites that are whitelisted
ARE subject to the MIME type blocking rules you create. Many organizations choose to block Internet radio and streaming media because they
add load to the internal network, as well as executable files because they can install viruses and various other malware. To block Internet radio,
which uses MPEG (.mpg, mpega, or .abs) or Microsoft audio (.wav) files, enter audio/x-mpeg or audio/x-wav as blocked MIME types. To block
streaming media, which uses MPEG video, enter video/mpeg or video/x-msvideo as blocked MIME types. To block access to executables (.exe),
enter application/octet-stream as a blocked MIME type.
IP-based exemption
If you want to exempt certain clients or sub-networks from all filtering (including spyware filtering), you can use the BLOCK/ACCEPT > IP
Block/Exempt page and specify the source IP address for those clients under IP and Port Exemptions. For example, if you want to exempt an
executive’s client machine from all filtering, you can do so using the IP address of the client. Similarly, if you want to exempt certain external
devices (such as trusted servers outside the protected network), from all filtering, you can specify the destination IP address and specific port
under IP and Port Exemptions.
Exempted IP addresses will bypass the following block filters:
58
Content filtering
IM blocking
All types of download blocking
Exempted IP Addresses will bypass ALL filters including spyware and virus filters.
IP-based blocking
To block ALL IP-based URLs, set Block IP Based URLs to Yes on the BLOCK/ACCEPT > URL Patterns page. The default and recommended
value for this setting is No.
If you want to block certain clients or sub-networks from all access, you can use the BLOCK/ACCEPT > IP Block/Exempt page and specify the
source IP address for those clients under IP and Port Exemptions. For example, if you want to block traffic from a suspicious client machine or
email servers or internal web servers, you can do so using the IP address of the client. Similarly, if you want to block certain external devices, you
can specify the destination IP address and specific port under IP and Port Exemptions. Note that when the Barracuda Web Filter is deployed as
a forward proxy, IP block/exempt rules based on request destination are not applied.
Application Filtering for Non Web Based Applications
en
The Barracuda Web Filter supports application filtering for inline deployments and not for proxy
deployments. Since the Barracuda Web Filter Vx virtual machine only supports proxy deployments, it
does not support application filtering.
Use the BLOCK/ACCEPT > Applications page to block or allow specific application
traffic over the HTTP (and HTTPS) protocol that is not browser-based. For example:
ITunes (Music Store, update), BitTorrent, various games, Pandora, Adobe Acrobat,
FTP.
For a user to download or use an application, the user’s application needs to
communicate with an external server. When you select to block an application, the
Barracuda Web Filter searches for traffic that contains data associated with an
application server and then blocks that traffic.
Related Articles
Using SSL Inspection
How to Configure SSL Inspection
7.0
How to Configure SSL Inspection
6.x
Web and Desktop Application
Control
Exceptions to policies can be created for a specific user or group based on bandwidth quotas, time of day and/or days of the week. For example,
you might want to allow employees to access certain applications such as iTunes, for example, ONLY during lunch hours. See Limiting Access by
Time frames, Time Quotas and Bandwidth Quotas. You can use the applications filter as a preemptive measure to protect your network against
malware.
Most common web applications are accessed over HTTPS. Note that application filtering configured on the BLOCK/ACCEPT >
Applications page does NOT scan for content. If you need to scan and filter content over HTTPS, you must enable SSL Inspection. No
te, however, that the SSL Inspection feature is only available on the Barracuda Web Filter 610 and higher, and requires more system
resources and installation of SSL certificates to configure. For background on SSL Inspection, see Using SSL Inspection With the
Barracuda Web Filter.
To simply block/allow specific functions that run within web applications, such as Facebook games or comments, for example, configure on the B
LOCK/ACCEPT > Web App Control page.
Using Custom Categories
59
en
If you navigate to the Block/Accept > Custom Categories page, you can build your own custom categories using any specific domains you
would like to include, any existing categories you would like to include, or both. All you need to do is:
1.
2.
3.
4.
Name your category at the top using the Category Name field.
Enter the names of the domains you would like to include in the Domains field.
Select the existing categories you would like to include in this category and click the < Add button.
When you've finished and are ready to create this new custom category, click the Add button at the bottom of the page.
Custom categories can be used in the same ways as existing categories.You can apply any rules or exceptions to custom categories in the same
way as you would using existing categories.
Exception Policies 6.x
en
This articles applies to the Barracuda Web Filter running firmware versions up to 6.x. For version 7.0 and higher, see Exception
Policies 7.x.
Once you have created desired block and accept policies, use the BLOCK/ACCEPT > Exceptions page to create exception policies for specific
users or groups so they can override the filters that block, warn or monitor access to applications and websites. You can create temporary
exceptions, called Temporary Whitelisting, using the ADVANCED > Delegated Admin page. You can create exception policies for the following
types of filters:
Domains
URL Patterns
Content, including Safe Search
Applications
Search Terms
Web Applications
All web traffic
You may want to create an exception policy that allows a subset of your users to access content that is blocked for other users. For example,
some organizations configure their content filters to block access to Job Search and Career Development sites like Monster.com. However, your
Human Resources department may require access to such sites. In this case, you can create an allow exception for the Job Search and Career
Development Subcategory and assign the policy to your Human Resources group.
In this article:
en
How Exceptions Work
Policy Alerts
Temporary Whitelist Exceptions
Limiting Access by Time frames, Time Quotas and Bandwidth Quotas
Safe Browsing / Safe Search - Limiting to Specific Users
Filtering on Search Terms
How Exceptions Work
When a user tries to access content that is blocked by one of the Barracuda Web Filter policies, the user receives a block message. If the user is
not authenticated with NTLM and is not using the Barracuda WSA agent, the block page will contain login fields as shown below:
Figure 1. Block page with login fields
60
If an exception policy exists for the blocked content, the user can enter the username and password for the account that was assigned to the
exception policy. After the user enters the correct account information, the Barracuda Web Filter applies the effective policy for that authenticated
user.
Policy Alerts
You can configure the Barracuda Web Filter to send an email alert to one or more email addresses when a content filter rule is triggered more
than a specified number of times. For example, if you block shopping and adult content categories from the BLOCK/ACCEPT > Content Filter pa
ge and one or more authenticated users browses sites under those categories, a Policy Alert email can be sent at a predefined interval (hourly,
etc.), summarizing the top number of users violating policy and the actions taken (block, warn, etc.).
You can set a policy alert frequency for sending the summary, a format (HTML, PDF, etc.) and a count of the top number of violators per content
category to include in the summary.
See the BASIC > Administration page to enable/disable and configure policy alerts, and then use the BLOCK/ACCEPT > Exceptions page to
specify the action, user(s) or group(s) to include as well as the content category and threshold for when to send alerts. You can also specify email
addresses to which policy alerts should be sent by role using the ADVANCED > Delegated Admin page.
Temporary Whitelist Exceptions
You can create temporary exceptions to ongoing policies if you need a user or set of users to be able to override a policy for a limited time (under
24 hours). This applies in particular to a user to whom you don’t want to give login credentials for the Barracuda Web filter. To enable temporary
exceptions, you must create a Temporary Whitelist role, login and password on the ADVANCED > Delegated Admin page. See Role-based
Administration 6.x for information about how to create the Temporary Whitelist role and assign/limit permissions to specific users or groups. See
Figure 1 above with the Temporary Whitelist button at the lower left of the block page.
An example of this role would be a group of students needing to access websites relative to a science class on reproduction, but those sites are
typically blocked by policy. The teacher can be given the Temporary Whitelist role login and password or use their LDAP credentials to log in
when a block page comes up. This enables the teacher to allow the blocked site (or the category of sites to which that URL belongs) for a limited
time while the students do research.
Limiting Access by Time frames, Time Quotas and Bandwidth Quotas
Use the Time Quota and Bandwidth Quota exception types on the BLOCK/ACCEPT > Exceptions page to assign browsing limits by domain,
URL, content category and/or application to specific users. A time quota specifies a quantity of time allowed for a user/group to browse certain
domains, URLs content categories and/or applications, while the bandwidth quota specifies a limited amount of bandwidth allowed per user or
group for the same. Bandwidth quotas include both download and upload traffic. The allow and monitor actions are available for time or bandwidth
quotas.
61
Quotas can be configured to be in effect during the Time Frame you specify.
Example 1: Suppose you want to limit access to chat sites to 30 minutes per day during business hours.
1. First create a block policy for this content category on the BLOCK/ACCEPT > Content Filter page.
2. Next, on the BLOCK/ACCEPT > Exceptions page, create an Allow action for a time quota of 30 minutes for a particular user or group
between the hours of 6:00 (6am) and 18:00 (6pm) for the Content Filter category and the Gaming sub category, and check each box for
Monday - Friday.
Note: Exceptions are applied in the order in which they are listed in the table on the BLOCK/ACCEPT > Exceptions page. For example,
if you want to block access to all web traffic for unauthenticated users but allow access to selected websites, first create the block excepti
on and then create the allow exception. You can re-order exception rules once they are created by dragging and dropping exceptions in
the table.
Example 2: You might want to allow limited access to gaming sites during lunch time.
1. Create a block policy on the BLOCK/ACCEPT > Content Filter page for the Game Playing category.
2. On the BLOCK/ACCEPT > Exceptions page, create an Allow action for a particular user or group between the hours of 12:00 (12pm)
and 1:00 (1pm) for the Content Filter category and the Gaming sub category. To prevent excessive bandwidth usage (uploading or
downloading), begin by creating a Block policy on the BLOCK/ACCEPT > Content Filter page for the Streaming Media category.
3. On the BLOCK/ACCEPT > Exceptions page, create an Allow action for a particular user or group for the Content Filter category and the
Streaming Media sub category, which includes the following:
Audio or video streaming services
Internet TV and radio
Webcam services
VoIP (Voice over IP) or telephone services via your computer
Specify the bandwidth limit to allow for these types of traffic in kb and select Daily, Weekly or Monthly from the drop-down. Use the B
ASIC > Reports page to create reports on time and/or bandwidth usage by user, group, application, content type, domain or URL.
Safe Browsing / Safe Search - Limiting to Specific Users
If you have disabled the Safe Browsing feature on the BLOCK/ACCEPT > Content Filter page, all users will be able to browse freely with the
listed search engines. If you enabled Safe Browsing, users will not see search engine content that contains objectionable thumbnail images in the
search results; only filtered thumbnails are displayed in the search results. To limit Safe Browsing only to specific users or groups of users, create
an exception using the Enable action, like this:
1.
2.
3.
4.
Select the Content Filter category.
Select the Safe Browsing sub category.
Select the Enable Action.
Click the Add button to see the exception added to the List of Exceptions table on the page.
Filtering on Search Terms
You can set and exception to Block, Warn, Monitor or Allow traffic one or more Search Terms you specify are found in any part of a URL. To
configure:
1.
2.
3.
4.
Select the Action.
In Applies To, select what type of user or group this rule applies to.
Select Search Terms as the Exception Type.
Select how to match:
Match Any - match any of the words you enter in the Sub Category text box in any order within the URL
Match All - match all of the words you enter in the Sub Category text box in any order within the URL
All In Order
5. Enter one or more alphanumeric strings in the Sub Category text box you want to filter in entire URLs. Separate multiple search terms by
single spaces.
6. Set other options such as HTTP Methods, Protocol, Time Frame or Days of Week as needed.
7. Use Policy Alerts (described above) if you want to be notified when your search terms are found. This is a useful feature to help detect
cyberbullying, adult content or other suspicious activities.
Exception Policies 7.x
en
62
This articles applies to the Barracuda Web Filter running firmware version
7.0 and higher.
Related Articles
How to Set Up YouTube for
Schools
How to Enable Safe Search for
Students 6.x
Once you have created desired block and accept policies, use the BLOCK/ACCEPT > Exceptions page to create exception policies for specific
users or groups so they can override the filters that block, warn or monitor access to applications and websites. You can create exception policies
for the following types of filters:
Domains
URL Patterns
Content, including Safe Search
Applications
Web 2.0 applications
Search terms (found anywhere in the URL)
All web traffic
Exceptions are useful for creating exception policies that allow a subset of your users to access content that is blocked for other users. See Exam
ples below.
In this article:
en
How Exceptions Work
Examples of Using Exceptions
Example 1 – Limiting access to job search websites
Example 2 – Restricting use of Google mail during business hours
Policy Alerts
Limiting Access by Time frames, Time Quotas and Bandwidth Quotas
Safe Browsing / Safe Search - Limiting to Specific Users
How Exceptions Work
When a user tries to access content that is blocked by one of the Barracuda Web Filter policies, the user receives a block message. If the user is
not authenticated with NTLM and is not using the Barracuda WSA agent, the block page will contain login fields as shown below:
Figure 1. Block page with login fields
63
If an exception policy exists for the blocked content, the user can enter their username and password (LDAP credentials, if configured) for the
account that was assigned to the exception policy. The block page also includes a Temporary Access Token field where a student can enter a
code they've been given by a teacher to allow temporary access to a particular website or category of websites for classroom research. See Tem
porary Access for Education for details. After the user enters the correct account information, the Barracuda Web Filter applies the effective policy
for that authenticated user.
Examples of Using Exceptions
Example 1 – Limiting access to job search websites
Your organization configures their content filters to block access to Job Search and Career Development sites like Monster.com. However, your
Human Resources department requires access to such sites. In this case, you would do the following to create the policy:
1.
2.
3.
4.
Create a group called HR on the USERS > USERS/GROUPS page. Assign appropriate users to this group.
Create a Block policy for Authenticated users on the BLOCK/ACCEPT > Content Filter page.
On the BLOCK/ACCEPT > Exceptions page, create an Allow exception for the Group HR.
Select the Job Search and Career Development Content Type for the Content Filter Exception Type.
Example 2 – Restricting use of Google mail during business hours
You want to allow managers access to Google Apps business mail, but block personal gmail during business hours. Here are the basic steps. For
detailed steps and other examples using Google Apps, see Google Apps Control Over HTTPS. This example requires configuration of SSL
Inspection, which is available on the Barracuda Web Filter 610 and higher.
1. Create a group called Managers on the USERS > USERS/GROUPS page. Assign appropriate users to this group.
2. On the BLOCK/ACCEPT > Exceptions page, create a Block policy (exception) for https://mail.google.com/mail using URL Patterns.
3. Select a Time Frame of Monday - Friday, 8am - 5pm (business hours).
4.
64
4. Select HTTPS as the Protocol.
5. Next, create an Allow exception for business Gmail use: On the BLOCK/ACCEPT > Exceptions page, select the Allow Action for Authe
nticated users.
6. Enter your business email domain name (ex: a1business.com) as the URL pattern.
Policy Alerts
You can configure the Barracuda Web Filter to send an email alert to one or more email addresses when a content filter rule is triggered more
than a specified number of times. For example, say you block the Propriety and Commerce categories on the BLOCK/ACCEPT > Content Filter
page and one or more authenticated users browses sites under those categories (such as Adult Content and Shopping content types
respectively). A Policy Alert email can be sent at a predefined interval (hourly, etc.), summarizing the top number of users violating the block polic
y for these categories.
Where to configure Policy Alerts
See the BLOCK/ACCEPT > Exceptions page to enable/disable and configure policy alerts, and to specify the action, user(s) or group(s)
to include as well as the content category and threshold for when to send alerts.
You can alternatively specify the email addresses to which policy alerts should be sent by role using the ADVANCED > Delegated
Admin page.
Configure policy alerts format (HTML, PDF, etc.) and frequency of notification emails from the BLOCK/ACCEPT > Configuration page.
Limiting Access by Time frames, Time Quotas and Bandwidth Quotas
Use the Time Quota and Bandwidth Quota exception types on the BLOCK/ACCEPT > Exceptions page to assign browsing limits by domain,
URL, content category and/or application to specific groups or individual users. Time based quotas can be based upon periods of time or a
calculation of time used. Periods of time are exact, for example: 1-2 pm; however, if you choose to limit time by calculation, the user's session
time logic is used to determine the amount of time spent. For more information about how session times and browse times are calculated, see Re
porting 7.x.
The bandwidth quotas are based on the amount of transferred data. Bandwidth quotas include both download and upload traffic. The allow and m
onitor actions are available for both time and bandwidth quotas. When groups are used, quotas are applied to each individual within the group,
not the group as a whole.
Quotas can be configured to be in effect during the Time Frame you specify.
Example 1: Suppose you want to limit access to chat sites to 30 minutes per day during business hours.
1. First create a block policy for this content category on the BLOCK/ACCEPT > Content Filter page.
2. Next, on the BLOCK/ACCEPT > Exceptions page, create an Allow action for a time quota of 30 minutes for a particular user or group
between the hours of 6:00 (6am) and 18:00 (6pm) for the Content Filter Exception Type and the Gaming Content Type, and check each
box for Monday - Friday.
Note: Exceptions are applied in the order in which they are listed in the table on the BLOCK/ACCEPT > Exceptions page. For example,
if you want to block access to all web traffic for unauthenticated users but allow access to selected websites, first create the block excepti
on and then create the allow exception. You can re-order exception rules once they are created by dragging and dropping exceptions in
the table.
Example 2: You might want to allow limited access to gaming sites during lunch time.
1. Create a block policy on the BLOCK/ACCEPT > Content Filter page for the Game Playing category.
2. On the BLOCK/ACCEPT > Exceptions page, create an Allow action for a particular user or group between the hours of 12:00 (12pm)
and 1:00 (1pm) for the Content Filter Exception Type and the Gaming Content Type. To prevent excessive bandwidth usage (uploading
or downloading), begin by creating a Block policy on the BLOCK/ACCEPT > Content Filter page for the Streaming Media category.
3. On the BLOCK/ACCEPT > Exceptions page, create an Allow action for a particular user or group for the Content Filter Exception Type
and the Streaming Media Content Type, which includes the following:
Audio or video streaming services
Internet TV and radio
Webcam services
VoIP (Voice over IP) or telephone services via your computer
Specify the bandwidth limit to allow for these types of traffic in kb and select Daily, Weekly or Monthly from the drop-down. Use the B
ASIC > Reports page to create reports on time and/or bandwidth usage by user, group, application, content type, domain or URL.
Safe Browsing / Safe Search - Limiting to Specific Users
65
If you have disabled the Safe Browsing feature on the BLOCK/ACCEPT > Content Filter page, all users will be able to browse freely with the
listed search engines. If you enabled Safe Browsing, users will not see search engine content that contains objectionable thumbnail images in the
search results; only filtered thumbnails are displayed in the search results. For instructions on limiting safe browsing to a group such as, for
example, students, see How to Enable Safe Search for Students 6.x.
Barracuda Web Filter for Education
en
The Barracuda Web Filter provides powerful tools for K-12 and beyond to easily
address the complex challenges of content and mobile security facing today’s
school-based network administrators. Features described in this article include:
en
Tools for Administrators
Filtering traffic for mobile devices and laptops
Authenticating Students With Chromebooks Off Network
Educational Tools, Educational Content
Social Networking and Web 2.0 - Regulating Use of Applications
CIPA Compliance
Safe Browsing / Safe Search - Limiting to Students
Delegated Administration
General Web Filtering on the Campus Network
Tools for Teachers
Related Articles
Using SSL Inspection With the
Barracuda Web Filter
How to Configure Web Application
Monitoring
How to Enable Safe Search for
Students 6.x
Barracuda Safe Browser - FAQ
Barracuda Safe Browser Setup
Guide
Tools for Administrators
Filtering traffic for mobile devices and laptops
With iPad Initiatives (school issued iPads) and campus-issued laptops emerging as a standard throughout the U.S. educational system, school
network administrators need to track devices on and off network as well as ensure safe browsing and enforcement of school policies regarding
content. For remote users with laptops, desktops and iOS devices, the Barracuda Web Filter provides location detection and the same application
of policies as local users with the following tools, both of which provide:
Location detection
Tamper proof use
Safe browsing
Web Security Agent (WSA)
Deployed on each remote desktop or laptop, the Barracuda Web
Security Agent proxies all web traffic over the Internet to a
specified Barracuda Web Filter, which has been configured to
recognize each remote client by traffic signed by the Barracuda
Web Filter. The same security policies are applied to remote
users as those applied to other users in the rest of your network.
See Barracuda Web Security Agent - How it Works.
this is a
sample.
66
Barracuda Safe Browser (BSB)
Deploy and use the Barracuda Safe Browser on iOS mobile
devices in place of the native browser, applying the same
security policies as those applied by the Barracuda Web Filter to
other users in the rest of your network. See Barracuda Safe
Browser Setup Guide - With Barracuda Web Filter.
Authenticating Students With Chromebooks Off Network
To configure LDAP authentication for students with Chromebooks off network, see Proxy Authentication for Chromebooks and Other Off-Network
Users. Also see How to Enforce Proxy Settings On a Chromebook Using Google Apps
Educational Tools, Educational Content
YouTube for Schools - Access thousands of free high quality educational videos on YouTube in a controlled environment for your
students.You can create your own school account for access to YouTube EDU content.
Temporary Access for Education to websites for student research - A portal to the Barracuda Web Filter where teachers can request and
manage temporary access for students to specified domains or categories of domains that are typically blocked by school policy.
Social Networking and Web 2.0 - Regulating Use of Applications
The Barracuda Web Filter 610 and higher enables granular control over Web 2.0 applications with the SSL Inspection feature. For example, you
can allow access to Facebook messages but block games, chat, posts etc. You can provide safe access to YouTube videos that provide rich
educational content using your YouTube for Schools account. With Web Application Monitoring, you can capture and archive the content of social
media interactions. See How to Configure Web Application Monitoring.
The SSL inspection feature is required to filter any applications that users access over HTTPS. For schools this provides powerful benefits with
common use cases such as these:
Google Apps Control Over HTTPS - Granular regulation of Google Apps tools over HTTPS (Business Gmail as opposed to personal
Gmail, and more)
YouTube Control Over HTTPS - Granular regulation of YouTube over HTTPS
Facebook Control Over HTTPS - Granular regulation of Facebook applications (chat, posting, games, etc.)
Suspicious Keyword Tracking - Monitor social messaging in real time, with keyword alert emails to teachers or administrators to trigger
immediate responses to emerging cases of bullying, harassment, or loss of confidential data. This feature does not require the use of
SSL Inspection unless you want to monitor HTTPS traffic content, and is available on the Barracuda Web Filter 610 and higher.
Safe Search over HTTPS
Note that SSL inspection is an opt-in, resource-intensive feature that requires the Barracuda Web Filter 610 and above. See How to
Configure SSL Inspection 7.0 for deployment requirements.
CIPA Compliance
Content filtering is central to providing CIPA compliance. The Barracuda Web Filter provides 95 content categories including:
Destructive sites such as those promoting violence, illegal drugs, or criminal activity
Sexual sites that may contain adult material or pornographic content
Gaming/gambling sites
Leisure sites (i.e. tobacco and alcohol)
Specific sites can also be blocked or allowed using explicit block and allow lists, and downloads can be limited to only specific approved file types.
The Barracuda Web Filter provides additional cutting edge tools like URL rewriting, which can automatically enforce Safe Search tags for sites like
Google images and video, preventing children from circumventing protection policies through the media caches of popular search engines.
Safe Browsing / Safe Search - Limiting to Students
You can enable the Safe Browsing feature on the BLOCK/ACCEPT > Content Filter page so that the group of users you specify will not see
search engine content that contains objectionable thumbnail images in the search results; only filtered thumbnails are displayed in the search
results. To limit Safe Browsing only to students, but allow appearance of all thumbnail images in search results for teachers and staff, see How
to Enable Safe Search for Students 6.x.
67
Delegated Administration
The administrator of the Barracuda Web Filter can choose to delegate certain administrative tasks such as scheduling or running reports, viewing
system status, load and log pages, or creating exceptions to policy. For example, school districts can maintain system level control while providing
restricted access to individual schools to manage policies or generate reports for teachers. See Role-based Administration for details.
General Web Filtering on the Campus Network
Blocking access to proxy servers students might try to use to circumvent web filtering policies. IT administrators must know the IP
addresses of any proxies to block as part of school policy. Ability to add new URLs daily as reported by teachers or other trusted sources.
Ability to create custom categories of domains for specific filtering.
Ability to report bad URLs to Barracuda Networks. Newly reported URLs to block and improved content filtering rules are updated to your
Barracuda Web Filter on a daily basis.
Sophisticated application control - block, monitor, warn, allow on Skype, Spotify, gaming software, communications, etc. See How to
Configure Web Application Monitoring.
Tools for Teachers
Temporary Access for Students (see above) - For school research projects or other classroom needs, with an easy to use web interface.
See How to Use Temporary Access for Students - Teacher's Guide
Suspicious Keyword Tracking and Cyberbullying Alerts (teachers can submit new keywords, keyword categories to their system
administrator)
YouTube for Schools access (see above)
safe browsing, student, youtube, campus, school, cyber, you tube, bully, remote user, ios
How to Set Up YouTube for Schools
en
This feature applies to the Barracuda Web Filter 5.0 and higher.
In this article:
en
About YouTube for Schools
Configuring YouTube for Schools
Blocking HTTPS Access to YouTube.com
How to Bypass the YouTube for Schools Feature for Specific Users
Related Articles
Creating Block and Accept Policies
Best Practices in Configuring Policy
About YouTube for Schools
Access thousands of free high quality educational videos on YouTube in a controlled environment for your students. You can create your own
school account for access to YouTube EDU content as well as a customizable playlist of videos that will be viewable only within your own school
network. To learn more about what YouTube for Schools offers, visit the YouTube for Schools website. Please read through this article carefully
to understand how to best provide access for your users to YouTube for Schools content.
Configuring YouTube for Schools
For educational institutions wishing to use YouTube For Schools filtering, the procedure to configure the Barracuda Web Filter follows:
1. Log into your YouTube.com account and sign up for YouTube for Schools here:
http://www.youtube.com/education_signup.
2. You can find instructions for setting up your YouTube for Schools account here: Signing up and Getting Started.
a.
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2.
a. During the sign up process, YouTube.com will provide you with a security token, or ‘unique ID’, which is a string of characters.
b. Save this string and enter it into the YouTube for Schools Token field in the Safe Browsing Configuration section on the BLO
CK/ACCEPT > Configuration page on the Barracuda Web Filter. This string will be appended by the Barracuda Web Filter to a
custom HTTP Header that will be used to identify all web traffic from computers on your school network.
For example, the ID string you receive from YouTube for Schools might look something like this: ABCD1234567890abcdef. The
Barracuda Web Filter will append this string to a field named
X-YouTube-Edu-Filter
to create a customer HTTP header, like this:
X-YouTube-Edu-Filter:ABCD1234567890abcdef
3.
4.
5.
6.
All outgoing traffic to YouTube.com from the Barracuda Web Filter will include this custom HTTP header to identify your school’s
network. If you are not blocking Streaming Media (on the BLOCK/ACCEPT > Content Filter page) on your Barracuda Web
Filter, go to step 5.
If you are blocking Streaming Media, you will need to create a new Custom Category on the BLOCK/ACCEPT > Custom Categories pa
ge. Caution: When naming your Custom Category, use something unique that is not already included on the BLOCK/ACCEPT >
Content Filter page. For example, in this case, you might name the new category Youtube Edu.
Ensure that the following top-level domains are not blocked, so add them to the Domains to be Included box:
youtube.com
ytimg.com
googlevideo.com
You must also check the Recategorize Domains box. This ensures that these two domains will be removed from the Streaming Media c
ategory. If you don't recategorize them, YouTube media will be blocked.
From the BLOCK/ACCEPT > Content Filter page, scroll down to Saved Custom Categories and click Allow for your new category for
both Authenticated and Unauthenticated users (selected at the top of the page).
In the Safe Browsing section, enable YouTube For Schools for both Authenticated and Unauthenticated users.
Blocking HTTPS Access to YouTube.com
If you are running version 6.0.1 or higher and want to block HTTPS access to YouTube.com and variants and subdomains of
YouTube.com, you can create an exception for HTTPS traffic by doing the following (see Figure 1 below):
1. On the BLOCK/ACCEPT > Exceptions page, select the Block Action.
2. For Applies To, select the types of users to include in your exception. In this example, the users who will be blocked are Authe
nticated.
3. Select Content Filter for Exception Type.
4. In the Content Type drop-down, select the custom category you created in step #3 above.
For example, if you created a new custom category for YouTube for Schools called Youtube Edu, select that Content Type.
5. If desired, select a Time Frame and/or Days of Week to apply the exception. In this example, the policy is enforced weekdays.
6. Select HTTPS in the Protocol drop-down.
7. Click the Add button to see the exception added to the List of Exceptions table below (see Figure 3). Now the Barracuda
Web Filter will allow all YouTube for Schools via HTTP, but will block HTTPS traffic from YouTube.com and its subdomains and
variants.
Important: A prerequisite to this configuration is that, in your Google account, you must not enforce 'HTTPS Only' for
YouTube. HTTP traffic must be allowed. Also note that, if the user types HTTPS into the YouTube.com URL, access will be
blocked and, if the Barracuda Web Filter is deployed inline, no block page will be presented. The user must then type HTTP for
the YouTube.com URL to have access to YouTube.com content.
Figure 1: Creating an exception to block HTTPS traffic from YouTube.com, while allowing HTTP traffic.
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How to Bypass the YouTube for Schools Feature for Specific Users
(Version 6.0.1 and higher)
If the YouTube for Schools feature is enabled under Safe Browsing on the BLOCK/ACCEPT > Content Filter page, you can create an
exception for a specific user or group of users to bypass this feature by doing the following:
1.
2.
3.
4.
On the BLOCK/ACCEPT > Exceptions page, select the Content Filter Exception Type.
Select the YouTube for Schools Content Type (in the Safe Browsing section of the drop-down list).
Select the Disable Action to allow the specified user or group to bypass the YouTube for Schools feature.
In the Applies To drop-down, select the user(s) or group to allow to bypass YouTube for Schools. In this example, the Finance group is
selected.
5. If desired, select a Time Frame and/or Days of Week to apply the exception. In this example, the policy is enforced weekdays.
6. Click the Add button to see the exception added to the List of Exceptions table below (see Figure 3).
Figure 2: Creating an exception to allow the Finance group to bypass YouTube.com.
Figure 3: List of exceptions created above.
How to Enable Safe Search for Students 7.1
en
You can enable the Safe Browsing feature on the BLOCK/ACCEPT > Content Filter
70
page so that the group of users you specify will not see search engine content that
contains objectionable thumbnail images in the search results; only filtered thumbnails
are displayed.
Important
Since Google and some other search engines always use HTTPS,
Barracuda recommends enabling the SSL Inspection feature when using
Safe Browsing or YouTube for Schools.To enable SSL Inspection, you must
have a Barracuda Web Filter 410 running version 7.1 or higher, or a
Barracuda Web Filter 610 or higher running version 6.0.1 or higher. For more
information about SSL Inspection, see How to Configure SSL Inspection 7.1.
Related Articles
Temporary Access for Education
Temporary Access for Students Teacher's Guide
Barracuda Web Filter for Education
Barracuda Safe Browser Setup
Guide
Barracuda Safe Browser - FAQ
To limit Safe Browsing only to students, but allow appearance of all thumbnail images in search results for teachers and staff, create an
exception using the Enable action, like this example:
1. Enable SSL Inspection if you want to enforce Safe Search over HTTPS.
a. Barracuda Web Filter 610 and higher: Enable SSL Inspection on the ADVANCED > SSL Inspection page and install a secure
certificate in all client browsers.
b. Barracuda Web Filter 410 running 7.1 and higher: Enable SSL Inspection on the BLOCK/ACCEPT > Configuration page and
install a secure certificate in all client browsers.
2. On the USERS/GROUPS > Local Groups page, create a new group called Students.
3. On the USERS/GROUPS > New Users page, add the students' usernames on the Barracuda Web Filter to the Students group,
following instructions in the online help for that page.
4. On the BLOCK/ACCEPT > Content Filter page, in the table under Safe Browsing, select Disable for each search engine listed in the
table, or click the All link.
5. On the BLOCK/ACCEPT > Exceptions page, create the policy:
a. For Applies To, select Local Group, and then in the next drop-down, select Students.
b. Select the Exception Type as Content Filter.
c. For Content Type, scroll down and select Safe Browsing.
d. Select the Enable action (it may be automatically selected) above.
e. Click the Add button to see the exception added to the List of Exceptions table on the page.
student, education, school, browse
How to Enable Safe Search for Students 6.x
en
You can enable the Safe Browsing feature on the BLOCK/ACCEPT > Content Filter
page so that the group of users you specify will not see search engine content that
contains objectionable thumbnail images in the search results; only filtered thumbnails
are displayed in the search results.
Important
Since using Google and some other search engines always use HTTPS,
Barracuda recommends enabling the SSL Inspection feature when using
Safe Browsing or YouTube for Schools.To enable SSL Inspection, you must
have a Barracuda Web Filter 610 or higher running version 6.0.1 or higher.
71
For more information about SSL Inspection, see How to Configure SSL
Inspection. In the Barracuda Web Filter web interface, go to the ADVANCED
> SSL Inspection page to configure.
To limit Safe Browsing only to students, but allow appearance of all thumbnail images
in search results for teachers and staff, for example, create an exception using the Ena
ble action, like this:
1. For the Barracuda Web Filter 610 and higher, enable SSL Inspection on the A
DVANCED > SSL Inspection page if you want to enforce Safe Search over
HTTPS.
2. On the USERS/GROUPS > Local Groups page, create a new group called St
udents.
3. On the USERS/GROUPS > New Users page, add the students' usernames on
the Barracuda Web Filter to the Students group, following instructions in the
online help for that page.
4. On the BLOCK/ACCEPT > Content Filter page, in the table under Safe
Browsing, select Disable for each search engine listed in the table, or click
the All link.
5. On the BLOCK/ACCEPT > Exceptions page, create the policy:
a. For Applies To, select Local Group, and then in the next drop-down,
select Students.
b. Select the Exception Type as Content Filter.
c. For Content Type, scroll down and select Safe Browsing.
d. Select the Enable Action (it may be automatically selected) above.
e. Click the Add button to see the exception added to the List of
Exceptions table on the page.
Related Articles
Temporary Access for Education
Temporary Access for Students Teacher's Guide
How to Configure SSL Inspection
7.0
Barracuda Web Filter for Education
Barracuda Safe Browser Setup
Guide
Barracuda Safe Browser - FAQ
students, education, school, browse
Suspicious Keyword Tracking
en
This feature is available with the Barracuda Web Filter 610 and higher
running version 7.0 and higher.
The Barracuda Web Filter can identify, track and report on suspicious keywords in
filtered social media traffic for notification and reporting purposes. For identifying
cyberbullying, profanity, terrorism, adult content and other suspicious social media
communications, Barracuda Networks employs a suspicious keywords lexicon to which
you can add custom keywords you want the Barracuda Web Filter to scan for and flag
in captured social media traffic.
Related Articles
How to Configure Web Application
Monitoring
How to Configure SSL Inspection
Using SSL Inspection With the
Barracuda Web Filter
72
You can configure alerts to be sent when these keywords are detected in captured traffic. The SSL Inspection feature must be enabled on the A
DVANCED > SSL Inspection page to use this feature. Using SSL inspection involves creating and/or installing SSL certificates in the Barrracuda
Web Filter and, for self-signed certificates, in all client browsers. For details, see Using SSL Inspection With the Barracuda Web Filter and How to
Configure SSL Inspection.
To configure Suspcious Keyword Tracking, do the following:
1. From the BLOCK/ACCEPT > Web App Monitor page , enable web application monitoring for specific actions you select in Facebook,
Twitter, Google and other popular social media portals. Granularity of actions includes chat, login, wall post, user registration, sending
email and more.
2. Optionally specify a Web Activity Archiving Email Address on the page, and the Barracuda Web Filter will package each interaction as
an SMTP message and email it to that address. Archived messages can then be indexed and searched by source or content, and alerts
can be generated per policy you set in your archiving solution. For information about searching archived messages and using policy
alerts with the Barracuda Message Archiver, see Understanding Basic and Advanced Search and Policy Alerts.
3. Enable tracking and flagging of suspicious keywords by selecting the keyword categories you want to scan for in the web applications
and actions enabled on the page. Click Save after making your selections to update the configuration. A report summarizing content
policy violations based on the selected Suspicious Keyword Categories will be emailed to the Suspicious Keywords Alert Email
Address you define in this section.
4. Optionally create your own custom keyword categories and associated words to scan for in searches and social media activities. For
each custom keyword category, enter your own words, each on a new line, that you wish to include in the keyword group. Click Add. The
new keyword category is added to the table.
5. Enable SSL Inspection on the ADVANCED > SSL Inspection page and create or upload an SSL certificate. Follow instructions in How
to Configure SSL Inspection to choose the best way to set up your SSL certificate.
The BASIC > Status page includes a section showing Recent Flagged Terms from the suspicious keywords lexicon that were identified in
captured social media interactions, as shown in Figure 1 below.
Figure 1: Recent Flagged Terms (suspicious keywords) in captured social media interactions
slang, pornography, terrorism, cyberbullying, cyber, bullying
Temporary Access for Education
en
This articles applies to the Barracuda Web Filter running firmware version
7.0 and higher.
73
The Temporary Access feature provides a portal where teachers can request and
manage temporary access for students to specified domains or categories of domains
that are typically blocked by school policy. In this way, students can access web
content that may be useful for research projects or other classroom needs on a
temporary basis.
Related Articles
How to Use Temporary Access for
Students - Teacher's Guide
Exception Policies - for
administrators
Role-based Administration 7.x
If the teacher's requested domains are approved, the Barracuda Web Filter issues a security token to the teacher to give to students to bypass
block pages when browsing specific websites.The teacher can specify a time frame during which security tokens are valid, and can disable tokens
at will. The administrator can revoke access for any security token, and can grant or revoke access to the Temporary Access portal to teachers.
Certain domains or categories of domains can be prohibited by the administrator from ever being granted temporary access.
With version 7.0.1 and higher, the administrator can choose to provide teachers with the option of simply using their network (LDAP, for
example) credentials to input to block pages for temporary bypass, rather than requiring the use of tokens.
Workflow for Administrators
Administrators have full visibility into teacher and student browsing activity via the BASIC > Temporary Access Requests log page in
the Barracuda Web Filter web interface. The teacher has a log of requests they've made and tokens assigned for accessing approved
websites as shown in Figure 8.
1. Begin by enabling the Temporary Access portal for teachers from the ADVANCED > Temporary Access page in the Barracuda Web
Filter web interface. From this page you can also:
a. Create a list of teachers, or specify LDAP Groups (as defined on the USERS > Users/Groups page) and configure whether the
teachers log in with their LDAP credentials, or with credentials you create on the ADVANCED > Temporary Access page.
b. Specify maximum time frame the teacher can use for student access tokens to remain valid. If you enable Allow Direct
Override, then no token is needed and the maximum time frame determines how long a teacher's login is valid for temporary
access to the previously blocked website.
c. List domains and or categories that will always be prohibited from temporary access.
d. Specify maximum number of domains or categories that can be requested by a teacher.
e. Use the Limited To field to limit who can use the Temporary Access feature based on local or LDAP users, groups, LDAP
organization units (OUs) or IP addresses.
See the ADVANCED > Temporary Access page for details about the configuration.
2. Make sure that the email address contact you want attached to the ContactIT link on the Temporary Access portal (see Figure 1 below)
is entered in the System Alerts Email Address in the Email Notifications section of the BASIC > Administration page.
3. Copy and paste the URL for the Temporary Access Portal from the ADVANCED > Temporary Access page into an email to the teacher.
The URL is defined as https://YourWebFilterIPAddress/portal . Include in the email the credentials you created on the page for the
teacher, or instruct them to use their LDAP credentials if you checked the Use LDAP Authentication checkbox. Also include a link to the
article How to Use Temporary Access for Students - Teacher's Guide, which has step-by-step instructions for the teacher to request
domains and get tokens to give their students. This article is also linked from within the help file that appears upon clicking the Help butto
n on the Temporary Access Portal pages. If you enable Allow Direct Override, then instruct the teacher that no token is needed - they
simply log in to bypass block pages.
4. Use the BASIC > Temporary Access Requests page to monitor activity of tokens by teacher username and date/time. You can also
revoke tokens on that page.
Prohibited Categories and Domains
If you have specified, from the ADVANCED > Temporary Access page, any categories or domains that are prohibited from temporary student
access, be sure to let the teacher know which ones are prohibited; otherwise, if the teacher requests those domains or categories, he/she will
receive an error message in the Temporary Access Portal.
Workflow for the Teacher
74
The workflow documented here helps the administrator to understand how to use the ADVANCED > Temporary Access page to configure this
feature, and answers some questions the teachers might have about getting and managing security tokens to give students to access specific
websites. For a set of instructions to give to teachers, see How to Use Temporary Access for Students, which can also be printed out as a PDF.
1. The teacher receives an email from the system administrator containing:
URL for the Temporary Access Portal
Either credentials for logging into the portal, or instructions to use their LDAP credentials
2. The teacher sees this login page upon browsing the URL and logs in as instructed.
Figure 1: Temporary Access Portal Login page
3. Once the teacher logs in, the Temporary Access Portal home page appears. In this case, the Display Name entered on the ADVANCED
> Temporary Access page for the teacher who is logged in is bjones.
Figure 2: Temporary Access Portal Welcome page
4. The teacher clicks Submit New Temporary Access Request to begin requesting domains for temporary student access from the
Temporary Access Portal Home page.
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4.
Figure 3: Temporary Access Portal Home page
Via the portal, the teacher can enter domains and/or select from a list of sub-categories (not categories ) as defined on the BLOCK/AC
CEPT > Content Filter page, including any custom categories you have defined. In the example shown in Figure 4, the teacher has
requested the Tripadvisor.com domain and is about to request Expedia.com. If the teacher had selected the Travel sub-category (where
the category is Leisure) , those domains would have been included along with lots of other domains categorized as 'Travel'. But if the
teacher only wants the students to be able to access these two travel domains, then only the explicit domains should be requested.
Discussing the Lookup Category option with teachers and educating them about categorization of domains may better prepare them to
use it safely.
Figure 4: In this example, the teacher has selected Tripadvisor.com
and is about to select Expedia.com for temporary
student access.
The teacher cannot actually select an entire category; only sub-categories, as shown below. However, to simplify instructions for
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teachers, the documentation will refer to selection of categories for an entire set of websites. After selecting the requested domains
and/or sub-categories for temporary student access, the teacher selects the time frame for access and optionally enters a comment, such
as the reason for access to these domains. All of this data is logged by date and username for the administrator to monitor on the BASIC
> Temporary Access Requests page. The domains, sub-categories and comments (if any) entered by the teacher will appear in the Det
ails popup linked to that page.
Figure 5: The teacher has clicked Lookup Category for the domain Expedia.com. Travel is a sub-category of the Leisure
category.
5. After the teacher makes a request for access to one or more sub-categories and/or domains and clicks Submit Request, the Barracuda
Web Filter returns a token (as shown in Figure 6), and the teacher can click the Make Another Request link at the bottom of the page for
more additions. The teacher gives the domain names and token to the students, who input the token to block pages when accessing
those domains.
Alternatively, you can grant the teachers the ability to simply use their temporary access (or LDAP) credentials to bypass block pages,
removing the need for tokens. Do this by checking the Allow Direct Override box in the Temporary Access Administrators section of
the ADVANCED > Temporary Access page. This simplifies the process, and the same limited time frames for student access are
applied after the teacher logs in.
Figure 6: Getting a token that is associated with access to all domains and/or sub-categories in a request.
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When the student tries to access a typically blocked website, he or she can enter the token as shown below to bypass the block page
and browse the site for the temporary time frame requested by the teacher. If Allow Direct Override is enabled, as mentioned above,
the teacher can click the Temporary Access Using User Credentials link as shown in Figure 7, and then log in with their credentials
instead of entering a token.
Figure 7: The student enters the token to bypass the block page for sites the teacher has requested
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Managing Temporary Access Requests and Tokens
When the teacher logs into the Temporary Access Portal, they can view a list of their temporary access requests on the home page. To
view this list from another page, the teacher clicks Home in upper right of the portal. For each request, the status and expiration dates
are displayed for the associated tokens.
From this page the teacher can disable a token before it expires, if necessary, by selecting the Disable check box, or can click the Copy l
ink to make a co py of the original request to renew it. Clicking Details for a request displays associated domains, categories, and
comments.
The administrator can view the same detail about tokens and revoke tokens from the BASIC > Temporary Access Requests page.
Figure 8: List of temporary access requests made by bjones in the last week
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How to Use Temporary Access for Students - Teacher's Guide
en
This article applies to the Barracuda Web Filter running firmware version 7.0 and higher.
With the Temporary Access feature of the Barracuda Web Filter, you can let your students temporarily access websites that are blocked by school
policy. You can create a list of domains (websites) that you want students to access and specify how long this access should be granted. The
maximum allowed time frame is determined by your system administrator.
To get temporary access for your students, use the Temporary Access Portal. In the portal, you can request temporary access to certain domains
for a specific period of time. When you submit your list of domains (or category of domains), you will receive a temporary access token for your
students, or your administrator will advise you to just log in with credentials they provide you (or your network login) to bypass block pages. When
your students browse any of the domains in your list, they can use the token to bypass block pages or you can log in. The token, as well as your
login, has an expiration time and date, after which the domains in your list be blocked again per school policy.
In the Temporary Access Portal, you can view the status and expiration dates of the tokens (or login) for your temporary access requests. You
can also choose to disable tokens before they expire.
In this article:
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en
Choosing Domains and Categories of Domains
Steps to Request Temporary Access for Students
How Students Gain Temporary Access to Regulated Websites
Managing Temporary Access Requests and Tokens
Choosing Domains and Categories of Domains
You can request temporary access for specific domains, as well as entire categories of domains. Domains, or websites, are commonly
categorized into groups so that schools and other organizations can create safe browsing policies for their users. For example, travel websites
would be in the Travel category. To let students access travel websites when planning a school trip, you can request that they be granted
temporary access to this category. However, use caution when allowing an entire category. Verify with your system administrator that the
category does not have objectionable content.
Prohibited Categories and Domains
If your system administrator has prohibited any categories or domains from temporary student access, you will receive an error message if you
request access to them. Before submitting your list of domains for temporary access, it is recommended that you let your system administrator
review your list for any prohibited categories or domains.
Steps to Request Temporary Access for Students
When you have a list of domains or categories of domains that you want students to temporarily access, log into the Temporary Access Portal to
submit your request and get access for your students.
1. If you do not have a URL or a login and password for the Temporary Access Portal, request this information from your system
administrator.
If you did not receive a login and password, you might have been instructed to use your regular network (LDAP) login and
password.
The URL for the Temporary Access Portal will look something like this:
https://10.1.1.1/portal
2. Go to the URL for the Temporary Access Portal, enter the credentials that you received from your administrator, and click Login.
Figure 1. Temporary Access Portal Login page.
3. On the Welcome page, click Submit New Temporary Access Request.
Figure 2. Temporary Access Portal Welcome page.
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3.
4. In the Website section of the New Access Request form, you can add domains and categories for domains.
To add a domain, enter the domain name in the text field and click Add.
To add a category for a domain, enter the domain name in the text field and then click Lookup Category to see what category the
domain belongs to. When the category displays, select it and then click Add.
When allowing an entire category, verify with your system administrator that the category does not include domains
that have objectionable content.
In the example shown in Figure 3, the teacher has requested the Tripadvisor.com domain and is about to request Expedia.com.
Figure 3. Requested site(s) for temporary access.
In the example shown in Figure 4, the category has been looked up for Expedia.com.
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Figure 4. After clicking Lookup Category for the domain Expedia.com, the Travel category is displayed.
If the teacher had selected the Travel category, both the Tripadvisor.com and Expedia.com domains would have been included along
with lots of other domains categorized as Travel. But if the teacher only wants the students to be able to access these two travel
domains, then only those domains must be added.
5. After you enter all of the domains and categories for temporary student access, specify how long this access should be granted and
optionally enter a comment that describes why access to these domains is being granted.
Enter as much time as students will need from the moment you submit the request until you want the temporary access to
expire. When you submit the request and receive a token, the time for the token immediately begins running down. If your
administrator has advised you, you may just use your login credentials instead of tokens; however, the time frame limit still
applies.
6. Click Submit Request. The Barracuda Web Filter returns a token (as shown in Figure 5). Give the token and list of allowed domain
names to your students, or use your login credentials if advised.
Figure 5. Getting a token that is associated with access to all domains and/or categories in a request.
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7. To make another temporary access request, click Make Another Request at the bottom of the page.
8. To see a list of any other temporary access requests that you made over the past week, click Home in the upper right of the page.
How Students Gain Temporary Access to Regulated Websites
When your students try to access a blocked website for which you have requested temporary access, an Access Denied page displays.
If your administrator instructed you to use tokens, give your students the token to enter to bypass the block page as shown in Figure 6.
If your administrator has instructed you to use your login credentials instead of tokens, click the Temporary Access Using User
Credentials as shown in Figure 6. The popup will refresh and you can then log in.
Students can now browse the site for the time frame that you specified when you submitted your temporary access request.
Figure 6. The student enters the token to bypass the block page.
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Managing Temporary Access Requests and Tokens
When you log into the Temporary Access Portal, you can view a list of your temporary access requests on the home page. To view this list from
another page, you can return to the home page by clicking Home in upper right of the portal. For each request, you can view the status and
expiration dates of the associated tokens.
From the list of temporary access requests, you can manage tokens or view more information about the request:
To disable a token before it expires, select the Disable check box.
To extend the access time frame, click Copy to make a copy of the original request.
To view more details for a request, click Details to view domains, categories, and comments.
Figure 7. List of temporary access requests made by bjones in the last week.
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How to Configure Web Application Monitoring
en
This feature applies to the Barracuda Web Filter 610 and higher running firmware version 6.0 and higher. Some features, as noted
below, are only available with version 8.0 and higher.
Capture and Archive Suspicious Content or Data Patterns in Chat,
Email, and Other Social Media Communications
The Barracuda Web Filter can inspect and catalog outbound content and forward it to
an email address or external message archiver, like the Barracuda Message Archiver.
These messages can be tied to the users' Active Directory credentials and fully
indexed, making them as easy to search as MS Exchange emails. This ensures that
social media communications from corporate networks are always available for access
and retrieval for eDiscovery and audits as well as to create alerts for proactive
monitoring.
Specific data patterns such as credit card numbers, Social Security numbers (U.S.),
HIPAA and privacy information can also be detected to help prevent data leakage.
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Related Articles
Using SSL Inspection
How to Configure SSL Inspection
7.0
How to Configure SSL Inspection
6.x
Web and Desktop Application
Control
Application Filtering for Non Web
Based Applications
Use this feature to capture and archive chat, email, user registrations and other social media communications on social media portals. Set alerts
to be sent to the administrator email address if certain data patterns are detected in outbound traffic, such as Social Security or credit card
numbers, or HIPAA related content.
Figure 1: Web Activity Monitoring
How Archiving and Searching Monitored Web Activity Works
From the BASIC > Administration page, you can specify a Web App Monitor Email Address for archiving selected actions such as logins,
chat, posts, comments and associated content. The Barracuda Web Filter will package each interaction as an SMTP message and email it to this
address, which can then be marked for archiving. Archived messages can then be indexed and searched by source or content, and alerts can be
generated per policy you set in your archiving solution, or, specifically based on specific data patterns. For information about searching archived
messages and using policy alerts with the Barracuda Message Archiver, see Understanding Basic and Advanced Search and Policy Alerts.
NOTE: SSL Inspection must be enabled for actions shown with an asterisk (*) on the BLOCK/ACCEPT > Web App Monitor page to be
archived. Examples include:
Facebook user registration and login
Google chat message
Twitter send tweet, login, direct message, user registration
For a complete list of actions for which SSL Inspection must be enabled for capture, see the BLOCK/ACCEPT > Web App Monitor page.
For more information about SSL Inspection, see Using SSL Inspection With the Barracuda Web Filter and How to Configure SSL Inspection 6.x.
Example of Social Media Archiving
You might want to allow users in the organization to use Facebook to view and make status updates and comments, but you want to capture the
content. You might also want to block games, shares and email/messages or other Facebook apps to protect your network from viruses and
malware.
If you want to regulate web 2.0 applications over HTTPS, then you must configure SSL Inspection from the ADVANCED > SSL
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Inspection page and set up SSL certificates. See How to Configure SSL Inspection 7.0.
To configure Web Application Monitoring, you'll want to first set up your block/accept policies for social media. Here's the process for the example
mentioned above:
1. From the BLOCK/ACCEPT > Web App Control page, in the Application Navigator, make sure that Social Media is checked.
In the Allowed Applications list box, hold the CTRL key and click Facebook games, Facebook share and/or any other Facebook
applications you want to block. Click Block.
Those applications will move to the Blocked Applications list box.
2. Save your changes. In this example, you have left Comment and status update and other Facebook apps in the Allowed Applications li
st, moving the applications you want to block, such as shares and games to the Blocked Applications list.
3. From the BLOCK/ACCEPT > Web App Monitor page, enable the application actions whose content you want to archive. In this
example, you would enable Facebook Comments and Status Update. After you enable any actions on the page, the Barracuda Web
Filter will capture the content from each action, package it as an SMTP message and email it to the Web Activity Archiving Email
Address you specify on the page.
Detecting Sensitive Data Patterns
Social media and other application communications as noted above may also be searched for data patterns such as:
Credit card numbers
Social security numbers
Privacy terms
HIPAA compliance terms
To help defend against potential data breaches, use the Data Pattern Categories to Monitor section to select applicable data patterns to detect
in web applications that you enable on the BLOCK/ACCEPT > Web App Monitor page. To configure this feature:
Enter a Suspicious Keywords Alert Email Address in the Web Activity Notification section of the BLOCK/ACCEPT > Web App
Monitor page if you want to receive an alert when these data patterns are detected in the applications you select.
If you also want to archive these communications, enter a Web Activity Archiving Email Address in the Web Activity Notification sect
ion of the page. After you enable any actions on the page, the Barracuda Web Filter will capture the content from each action in which the
selected data patterns are detected, package it as an SMTP message and email it to that email address.
Web App Monitor Log
The BASIC > Web App Monitor Log lists all chat, email, user registrations and other social media interaction traffic it processes per settings you
configure on the BLOCK/ACCEPT Web App Monitor page. Fields logged are:
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Date - Date and time of the request.
Source IP - IP address of the client that originated the request.
Username - The name of the user that sent the request.
Summary - The action represented in the request. For example, Facebook Comment.
Destination - URL visited in the request.
Details - Detailed information about the actions: search engine keywords, word from a Facebook Comment, etc.
Using SSL Inspection With the Barracuda Web Filter
en
SSL Inspection is a resource intensive feature which is supported by the Barracuda Web Filter as follows:
410 in Forward Proxy or Inline deployments, running version 7.1 and higher, for Safe Browsing and YouTube for Schools.
See How to Configure SSL Inspection 7.1.
610 and higher in Forward Proxy or Inline deployments, running version 7.1 and higher. After enabling SSL Inspection, all
applications you select on the BLOCK/ACCEPT > Web App Control and Web App Monitor pages are automatically
subject to SSL Inspection.
610 and 810 in Forward Proxy mode, 910 and higher in Forward Proxy or Inline deployments, running firmware version
6.0.1 and higher. See How to Configure SSL Inspection 6.x.
Why SSL Inspection Is Important
By enabling the Barracuda Web Filter to decrypt, inspect and re-encrypt web traffic at
the URL level, administrators have fine grained control over the use of web-based
applications. What this means is that administrators can choose to block certain
portions of web based applications such as Facebook Chat and Facebook Sharing,
while enabling the rest of Facebook. Since Facebook, Google and other search
engines and many web-based applications run over HTTPS, SSL Inspection is required
for this level of monitoring and blocking. With this control the administrator can define
what they deem permissible on their network without having to block all of Facebook,
Twitter, Google Apps and other popular web-based applications.
Related Articles
How to Configure SSL Inspection
7.1
How to Enable Safe Search for
Students 7.1
How to Configure SSL Inspection
6.x
Configure SSL Inspection for
Google Chrome
How SSL Inspection Works
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With SSL Inspection, the content of a URL over HTTPS can be scanned. This allows the Barracuda Web Filter to apply policies and detect
malware and viruses at the URL level.
The Barracuda Web Filter acts as a secure intermediary between user HTTPS web requests and the destination web server (i.e. Facebook.com,
YouTube.com, yourdomain.com, etc.). HTTPS content in user web requests is decrypted and scanned by the Barracuda Web Filter, which then
detects malware and enforces web policies configured on the BLOCK/ACCEPT pages. After processing, this HTTPS traffic will be re-encrypted
on the fly by the Barracuda Web Filter and routed to the destination web server as shown in Figure 1.
Figure 1: SSL Inspection
To use this feature, the administrator installs a root certificate in client browsers from the Barracuda Web Filter. The Barracuda Web Filter can
then intercept and inspect the HTTPS connections by presenting the client a CA derived from this root CA. If you have a high availability
deployment, you must install the same root certificate on each Barracuda Web Filter.
Popular Use Cases of SSL Inspection
Social media sites like Facebook and YouTube are now typically accessed over HTTPS, the encryption protocol used to protect online banking
sessions and user logins for services of all kinds on the web.
Suspicious Keyword Tracking – (Version 7.0 and higher) Monitor social messaging over HTTP/HTTPS in real time, with keyword alert
emails to teachers or administrators to trigger immediate responses to emerging cases of bullying, harassment, or loss of confidential
data. This feature only requires the use of SSL Inspection if traffic is over HTTPS (which is typical for Facebook, Google Apps, etc.) and
is available on the Barracuda Web Filter 610 and higher. Database of keywords is embedded in the Barracuda Web Filter, is frequently
updated, and can be customized. See the BLOCK/ACCEPT > Web App Monitor page to configure.
Google Apps Control Over HTTPS – Granular regulation of Google Apps tools over HTTPS; for example, allow business Gmail account
access, but block personal Gmail account access.
Facebook Control Over HTTPS – Regulation and archiving of Facebook application interactions (chat, posting, games, etc.)
Safe Search over HTTPS - Users or groups you specify will not see search engine content that contains objectionable thumbnail images
in the search results; only filtered thumbnails are displayed in the search results.
Allowing access to web-based email applications, but preventing potentially dangerous uploads and downloads.
For configuration steps, see How to Configure SSL Inspection.
With version 6.0 - 7.0, if you enable SSL Inspection, only the domains (maximum of 5) and/or URL categories that you specify on the A
DVANCED > SSL Inspection page will be filtered at the URL level. For version 7.1.0 and higher, see How to Configure SSL Inspection
7.1.
How to Configure SSL Inspection 7.1
en
SSL Inspection is a resource intensive feature which is supported by the Barracuda Web Filter as follows:
410 in Forward Proxy or Inline deployments, running version 7.1 and higher, for Safe Browsing and YouTube for Schools.
610 and higher in Forward Proxy or Inline deployments, running version 7.1 and higher. After enabling SSL Inspection, all
applications you select on the BLOCK/ACCEPT > Web App Control and Web App Monitor pages are automatically
subject to SSL Inspection.
610 and 810 in Forward Proxy mode, 910 and higher in Forward Proxy or Inline deployments, running firmware version
6.0.1 and higher. See How to Configure SSL Inspection 6.x.
90
For background information about this feature, see Using SSL Inspection With the
Barracuda Web Filter. If you are using Google Chrome browser, after reading this
article, see How to Configure SSL Inspection for Google Chrome Browser to prevent
certificate errors users might encounter.
Work Flow to Enable and Configure SSL Inspection
If you have a Barracuda Web Filter 410, simply enable SSL Inspection on the BLOCK/
ACCEPT > Configuration page, then download the Barracuda root certificate from the
page as shown in Figure 1. The certificate needs to be installed on all remote devices
that will be inspected. As an administrator you may have methods of pushing the
certificate to managed remote devices. For unmanaged devices, you may want to
enable users to install the certificate in their browsers themselves. In this case you will
need to provide them access to the certificate file. You can do so by emailing the
certificate, or posting it on an internal network share, or posting it on a public or private
web server. SSL Inspection will then be applied to any Safe Search selections you
make on the BLOCK/ACCEPT > Content Filter page, as well as for YouTube for
Schools content.
Related Articles
Using SSL Inspection
How to Enable Safe Search for
Students 7.1
Barracuda Web Security Agent How it Works 7.1
How to Configure SSL Inspection
6.x
Create and Install a Self-Signed
Certificate
How to Configure SSL Inspection
for Google Chrome Browser
Figure 1: Download a secure certificate for browsers from the BLOCK/ACCEPT > Configuration page
If you have a Barracuda Web Filter 610 or higher, follow these steps:
1. Go to the ADVANCED > SSL Inspection page and set SSL Inspection Method to one of the following:
Transparent – This inspection method is more resource intensive than the Proxy inspection method. This method works with
inline deployments, where the Proxy method does not. If you have a Barracuda Web Filter Vx virtual appliance, you must select
Proxy since the Vx does not support inline deployment.
CAUTION: This is a resource intensive feature, and Transparent inspection can, under certain configurations, result in
a large impact on performance.
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Barracuda Web Filter 610 and 810 deployed inline: Note that you cannot specify domains or categories for SSL Inspection in
Transparent mode. However, SSL Inspection will automatically be applied to Safe Search, Google searches and applications
and features you configure on the BLOCK/ACCEPT > Web App Monitor and Web App Control pages.
Barracuda Web Filter 910 and higher: Note that you cannot inspect content filter categories with this method - just domains that
you specify.
Proxy – This method works with Forward Proxy deployments only and is less resource intensive than the Transparent inspectio
n method. Configure all client web browsers with the IP address of the Barracuda Web Filter as their forward proxy server. Select
this method if you have a Barracuda Web Filter Vx virtual appliance. With the Barracuda Web Filter 610 and 810, you can select
domains and categories for SSL Inspection. If you are using the Chrome browser, also see How to Configure SSL Inspection for
Google Chrome Browser.
Off – Disable SSL Inspection of HTTPS traffic. This means that the Barracuda Web Filter will not decrypt HTTPS traffic at the
URL level. You will be able to block/allow HTTPS domains, but you will not be able to archive actions users take on social media
sites such as, for example, Facebook chat content, logins on Twitter or Yahoo!, etc. as defined on the BLOCK/ACCEPT > Web
App Monitor page.
2. Specify domains and content filter categories to which you want to apply SSL inspection. Because enabling SSL Inspection increases the
load on system resources, you should only specify the domains and/or content filter categories to inspect that meet the needs of your
organization. With the Barracuda Web Filter 610 and 810 using Transparent inspection, you cannot select domains and categories to
inspect as described above.
Configure one or both of the following settings for applying SSL Inspection:
Domains to Be Inspected – Enter up to 5 domain names that you want to be inspected and filtered at the URL level.
Content Filter Categories – Using the Add and Remove buttons, from the Categories List, you can add or remove content filter
categories to/from the list of categories that you want to be inspected. You must use the Proxy inspection method if you want to
inspect categories.
Any domains or URL categories that are not specified on the page will not be subject to SSL Inspection, except for what you
configure on the BLOCK/ACCEPT > Web App Monitor and Web App Control pages, Safe Browsing selections you make on
the BLOCK/ACCEPT > Content Filter page, and YouTube for Schools content.
3. Select and install an SSL certificate to use with client browsers. Barracuda recommends using the Barracuda Default Certificate for SSL
Inspection which you can download from the Barracuda Web Filter and install on client browsers. See How to Use the Barracuda Default
Certificate for SSL Inspection.
You can alternatively create and download your own self-signed certificate from the Barracuda Web Filter and install it in client browsers.
This method is simple and you can do everything from the ADVANCED > SSL Inspection page, except for installing the certificate in
client browsers. See How to Create and Install a Self-Signed Certificate for SSL Inspection.
Due to the power of a Certificate Authority (CA) certificate, this type of certificate use for SSL Inspection is not easy to obtain, so
Barracuda recommends using either the Barracuda default certificate or a self-signed certificate.
SSL Inspection With the Barracuda Web Security Agent (WSA)
If you have remote users outside the network running the Barracuda WSA on their laptops or Macs, you can configure SSL Inspection as follows:
1. After enabling SSL Inspection as described above,
2. Go to the ADVANCED > Remote Filtering page and set Policy Lookup Only Mode to No - this is required when using SSL Inspection,
because in that mode, web traffic is not routed through the Barracuda Web Filter.
3. On the WSA client, sync the settings. To do so manually from the WSA client, click on the agent in the toolbar tray and click Sync.
How to Configure SSL Inspection 7.0
en
SSL Inspection is supported by the Barracuda Web Filter as follows:
Barracuda Web Filter 410 and higher in either inline or forward proxy mode, running version 7.1.0 and higher. See How to
Configure SSL Inspection 7.1 if you are running this version.
Barracuda Web Filter 610 and 810 in Forward Proxy mode, running version 6.0.1 - 7.0 (see How to Configure SSL
Inspection 6.x) and version 7.0 (as described in this article).
Barracuda Web Filter 910 and 1010 in Forward Proxy or Inline deployments running version 6.0.1 - 7.0.
Up to version 7.0: If you enable SSL Inspection, only domains and/or content filter categories that you specify on
the ADVANCED > SSL Inspection page will be inspected and filtered at the URL level.
For background information about this feature, see Using SSL Inspection With the
92
Barracuda Web Filter. If you are using Google Chrome browser, after reading this
article, see How to Configure SSL Inspection for Google Chrome Browser to prevent
certificate errors users might encounter.
Related Articles
How to Configure SSL Inspection
6.x
Create and Install a Self-Signed
Certificate
Using SSL Inspection
Work Flow to Enable and Configure SSL Inspection
1. On the ADVANCED > SSL Inspection page, set SSL Inspection Method to one of the following:
Transparent – Available on the Barracuda Web Filter 910 and 1010 as noted above. This inspection method is more resource
intensive than the Proxy inspection method. This method works with inline deployments.
CAUTION: Because this is a resource intensive feature, Transparent inspection can, under certain configurations,
result in a large impact on performance. Note that you cannot inspect content filter categories with this method just domains that you specify.
Proxy – Available for the Barracuda Web Filter 610 and higher. This method works with Forward Proxy deployments only and is
less resource intensive than the Transparent inspection method. Configure all client web browsers with the IP address of the
Barracuda Web Filter as their forward proxy server. If you are using the Chrome browser, also see How to Configure SSL
Inspection for Google Chrome Browser.
Off – Disable SSL Inspection of HTTPS traffic. This means that the Barracuda Web Filter will not decrypt HTTPS traffic at the
URL level. You will be able to block/allow HTTPS domains, but you will not be able to archive actions users take on social media
sites such as, for example, Facebook chat content, logins on Twitter or Yahoo!, etc. as defined on the BLOCK/ACCEPT > Web
App Monitor page.
2. Specify domains and content filter categories to which you want to apply SSL inspection. Because enabling SSL Inspection increases the
load on system resources, you should only specify the domains and/or content filter categories to inspect that meet the needs of your
organization.
Configure one or both of the following settings for applying SSL Inspection:
Domains to Be Inspected – Enter up to 5 domain names that you want to be inspected and filtered at the URL level.
Content Filter Categories – Using the Add and Remove buttons, from the Categories List, you can add or remove content filter
categories to/from the list of categories that you want to be inspected. You must use the Proxy inspection method if you want to
inspect categories.
Any domains or URL categories that are not specified on the page will not be subject to SSL Inspection.
3. Select and install an SSL certificate to use with client browsers. Barracuda recommends using the Barracuda Default Certificate for SSL
Inspection that you can download from the Barracuda Web Filter and install on client browsers. See How to Use the Barracuda Default
Certificate for SSL Inspection.
You can alternatively create and download your own self-signed certificate from the Barracuda Web Filter and install it in client browsers.
This method is simple and you can do everything from the ADVANCED > SSL Inspection page, except for installing the certificate in
client browsers. See How to Create and Install a Self-Signed Certificate for SSL Inspection.
Due to the power of a Certificate Authority (CA) certificate, this type of certificate use for SSL Inspection is not easy to obtain, so
Barracuda recommends using either the Barracuda Default certificate or a self-signed certificate.
How to Configure SSL Inspection for Google Chrome Browser
en
Because the Google Chrome browser adheres to stringent security checks for client protection, the user may get certificate errors when SSL
inspection is enabled on the Barracuda Web Filter. These errors cause browser activity to stop without an opportunity to bypass or override the
error, and the session is disconnected. Users may encounter these errors when visiting Google.com, Twitter.com or other sites over HTTPS.
To avoid these certificate errors, download a root CA (SSL certificate) from the Barracuda Web Filter and install it on each Chrome client browser.
To do so, follow these steps:
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1. Log into the Barracuda Web Filter as admin.
2. If you are running version 7.1 or higher and you have a Barracuda Web Filter 410, enable SSL Inspection on the BLOCK/ACCEPT >
Configuration page. Otherwise skip to step #3. Click Download to get the Root Certificate For Browsers. Save the file on your local
system or network. Skip to step 7.
3. Go to the ADVANCED > SSL Inspection page and select your SSL Inspection Method at the top of the page.
4. Scroll down to the Certificate Creation section of the page and select Create Certificate.
5. In the Certificate Generation section below, fill in your organization information, following the instructions on the page, or in the Help file,
and then click Create Certificate.
6. In the Available Certificates section below, click Download for the Root Certificate for Browsers.
7. In your Chrome browser, go to Settings.
8. Search on 'Certificates'
9. Click Manage Certificates.
10. In the Certificates window, click Import...
11. Follow the instructions in the wizard to browse your local drive or network and upload the .der certificate file you downloaded from the
Barracuda Web Filter.
12. Click Next.
13. Select where you want to store the certificate, or allow Chrome to automatically select the certificate store.
14. Continue with the wizard to finish.
15. Close the Certificates window.
Successful installation is indicated by an Import Successful message.
How to Configure SSL Inspection 6.x
en
This article applies to the Barracuda Web Filter running up to firmware version 6.0, and only in Forward Proxy deployments. For
firmware version 7.1 and higher you can also use SSL Inspection with the Barracuda Web Filter 410 and the Barracuda Web
Security Agent (WSA). See How to Configure SSL Inspection 7.1.
With version 6.x, note that if you enable SSL Inspection, only domains and/or URL categories you specify on the ADVANCED >
SSL Inspection page will be inspected and filtered at the URL level.
For background information about this feature, see Using SSL Inspection With the
Barracuda Web Filter. If you are using Google Chrome browser, after reading this
article, see How to Configure SSL Inspection for Google Chrome Browser to prevent
certificate errors users might encounter.
Related Articles
Using SSL Inspection With the
Barracuda Web Filter
Work Flow to Enable and Configure SSL Inspection
1. On the ADVANCED > SSL Inspection page, set Enable SSL Inspection to Yes.
2. Specify domains and/or content filter categories to which you want to apply SSL inspection. Because enabling SSL Inspection increases
the load on system resources, you should only specify the domains and/or content filter categories to inspect that meet the needs of your
organization.
Configure one or both of the following settings for applying SSL Inspection:
Domains to Be Inspected – Enter up to 5 domain names that you want to be inspected and filtered at the URL level.
Content Filter Categories – Using the Add and Remove buttons, from the Categories List, you can add or remove content filter
categories to/from the list of categories that you want to be inspected. You must use the Proxy inspection method if you want to
inspect categories.
Any domains or URL categories that are not specified on the page will not be subject to SSL Inspection.
3. Select and install an SSL certificate to use with client browsers. Barracuda recommends using the Barracuda Default Certificate for SSL
Inspection that you can download from the Barracuda Web Filter and install on client browsers. See How to Use the Barracuda Default
94
3.
Certificate for SSL Inspection.
You can alternatively create and download your own self-signed certificate from the Barracuda Web Filter and install it in client browsers.
This method is simple and you can do everything from the ADVANCED > SSL Inspection page, except for installing the certificate in
client browsers. See How to Create and Install a Self-Signed Certificate for SSL Inspection.
Due to the power of a Certificate Authority (CA) certificate, this type of certificate use for SSL Inspection is not easy to obtain, so
Barracuda recommends using either the Barracuda Default certificate or a self-signed certificate.
4. If you haven't already done so, configure all client web browsers with the IP address of the Barracuda Web Filter as their forward proxy
server, on port 3128.
How to Create and Install a Self-Signed Certificate for SSL Inspection
en
Due to the power of a Certificate Authority (CA) certificate, this type of certificate use for
SSL Inspection is not easy to obtain. Barracuda recommends using the Barracuda
Default Certificate for SSL Inspection, which you can download from the Barracuda
Web Filter and install on client browsers.
With the Barracuda Web Filter 610 and higher, you can either download the B
arracuda Default root certificate or you can create and download your own
self-signed certificate from the Barracuda Web Filter and install it in client
browsers, as described in this article.
With the Barracuda Web Filter 410 running version 7.1 and higher, you can
download the Barracuda Default root certificate from the BLOCK/ACCEPT >
Configuration page. See How to Configure SSL Inspection 7.1 for details.
Follow these steps to create and install a self-signed certificate on the Barracuda Web
Filter 610 and higher, specifically for use with the SSL Inspection feature:
Related Articles
How to Configure SSL Inspection
7.1
How to Configure SSL Inspection
6.x
How to Use the Barracuda Default
Certificate for SSL Inspection
Using SSL Inspection
1. Go to the ADVANCED > SSL Inspection page and, in the Certificate Creation section, click Create Certificate.
2. In the Certificate Generation section of the page, fill in the Organization Info fields, and then click Create Certificate. Your certificate
appears in the Available Certificates section of the page.
3. Now you have two options:
Either push or manually install the certificate on client browsers. Next to Root Certificate For Browsers, click Download to
obtain the certificate file, and then install the certificate on each client browser.
Enable users to download and install the certificate in their browsers. Do this by setting Enable Browser Certificate Download t
o Yes. Click the Save Changes at the top of the page. Next, send users an email message, paste in the URL displayed next to
Enable Browser Certificate Download on the page, and include instructions to upload the certificate from this URL to their
browsers. Or you can embed the URL in the block page by customizing the content on the BLOCK/ACCEPT > Block Messages
page.Typically the client browser provides a wizard to guide the install of the certificate. If you choose this option, you can also
require users to authenticate via LDAP before downloading the certificate.
Configure other SSL Inspection settings as needed on the ADVANCED > SSL Inspection page.
For High Availability System (Linked Management/Clustering)
If you have a high availability (Linked Management) deployment, you must install a certificate on each Barracuda Web Filter in the cluster. You
must also install a browser certificate in all client browsers. In this example, there are three Barracuda Web Filters in the cluster: B1, B2, and B3.
1. Go to the ADVANCED > SSL Inspection page of the Barracuda Web Filter B1 and the follow instructions above to create a self-signed
certificate.
2. Next to Root Certificate For Web Filter, click Download and store the file on your system.
3. Now you have two options:
a.
95
3.
a. Either push or install the certificate on client browsers. Next to Root Certificate For Browsers, click Download to obtain the
certificate file, and then install the certificate on each client browser.
b. Enable users to download and install the certificate in their browsers. Do this by setting Enable Browser Certificate Download t
o Yes. Click the Save Changes at the top of the page. Next, send users an email message, paste in the URL displayed next to
Enable Browser Certificate Download on the page, and include instructions on how to upload the certificate from this URL to
their browsers.Typically the browser provides a wizard to guide the install of the certificate. If you choose this option, you can
also require users to authenticate via LDAP before downloading the certificate.
4. On Barracuda Web Filters B2 and B3:
a. In the Certificate Creation section of the page, select Upload Certificate for the Certificate Creation Method.
b. In the Certificate Generation section, click Browse next to Certificate Authority. Find the root certificate file for the Barracuda
Web Filter that you downloaded from B1 in step 2.
c. Click Upload Certificate to install the root certificate on the Barracuda Web Filter B2 and B3.
Configure other SSL Inspection settings as needed on the ADVANCED > SSL Inspection page of each Barracuda Web Filter in the cluster.
How to Use the Barracuda Default Certificate for SSL Inspection
en
When using SSL Inspection, Barracuda recommends using the Barracuda default ssl
certificate which you can download from the Barracuda Web Filter and install on client
browsers. Note that, with the Barracuda Web Filter 610 and higher, you can alternativel
y Create and Install a Self-Signed Certificate for SSL Inspection with your organization
information from the ADVANCED > SSL Inspection page.
Follow these steps to use the Barracuda default certificate on the Barracuda Web Filter
specifically for use with the SSL Inspection feature:
Related Articles
How to Configure SSL Inspection
7.1
How to Configure SSL Inspection
6.x
Create and Install a Self-Signed
Certificate for SSL Inspection
Using SSL Inspection
Barracuda Web Filter 410 and higher running version 7.1 and higer:
1. Download the Barracuda Default root certificate from the BLOCK/ACCEPT > Configuration page.
2. Either manually install the certificate on client browsers, or push to browsers using a Windows GPO.
3. Enable SSL Inspection on the BLOCK/ACCEPT > Configuration page.
Barracuda Web Filter 610 and higher:
1. Go to the ADVANCED > SSL Inspection page.
2. You have two options for getting and distributing the default Root Certificate from the Barracuda Web Filter to client browsers. In the Avai
lable Certificates section of the page, do one of the following:
a. Push or manually install the certificate on client browsers. Next to Root Certificate For Browsers, click Download to obtain the
certificate file, and then install the certificate on each client browser, either manually or with a GPO.
b. Enable users to download and install the certificate in their browsers.
i. Set Enable Browser Certificate Download to Yes. Click Save Changes at the top of the page.
ii. Send users an email message, paste in the URL displayed next to Enable Browser Certificate Download on the page,
and include instructions to upload the certificate from this URL to their browsers. Or you can embed the URL in the block
page by customizing the content on the BLOCK/ACCEPT > Block Messages page.Typically the client browser
provides a wizard to guide the install of the certificate. If you choose this option, you can also require users to
authenticate via LDAP before downloading the certificate.
3. Configure other SSL Inspection settings as needed on the ADVANCED > SSL Inspection page.
Note that, with version 7.0.1 and higher, you cannot remove the Barracuda Root Certificate. You can, however, overwrite it with a self-signed
certificate.
96
For High Availability System (Linked Management/Clustering)
If you have a high availability (Linked Management) deployment, you must install a certificate on each Barracuda Web Filter in the cluster. You
must also install a browser certificate in all client browsers.
Example: You might have three Barracuda Web Filters in the cluster: B1, B2, and B3.
1. Go to the ADVANCED > SSL Inspection page of the Barracuda Web Filter B1 and the follow instructions above to download the Barrac
uda Web Filter root certificate.
2. Next to Root Certificate For Web Filter, click Download and store the file on your system.
3. Now you have two options:
a. Either push or install the certificate on client browsers. Next to Root Certificate For Browsers, click Download to obtain the
certificate file, and then install the certificate on each client browser.
b. Enable users to download and install the certificate in their browsers. Do this by setting Enable Browser Certificate Download t
o Yes. Click the Save Changes at the top of the page. Next, send users an email message, paste in the URL displayed next to
Enable Browser Certificate Download on the page, and include instructions on how to upload the certificate from this URL to
their browsers.Typically the browser provides a wizard to guide the install of the certificate. If you choose this option, you can
also require users to authenticate via LDAP before downloading the certificate.
4. On Barracuda Web Filters B2 and B3:
a. In the Certificate Creation section of the page, select Upload Certificate for the Certificate Creation Method.
b. In the Certificate Generation section of the ADVANCED > SSL Inspection page, click Browse next to Certificate Authority. F
ind the root certificate file for the Barracuda Web Filter that you downloaded from B1 in step 2.
c. Click Upload Certificate to install the root certificate on the Barracuda Web Filters B2 and B3.
Configure other SSL Inspection settings as needed on the ADVANCED > SSL Inspection page of Barracuda Web Filter B1 - aside from the SSL
certificates, SSL Inspection settings will propagate to the other systems in the cluster.
Google Apps Control Over HTTPS
en
SSL Inspection of HTTPS traffic for this use case is available:
With either WCCP or Forward Proxy deployments on the Barracuda Web Filter 610 and higher, running version 6.x and
higher.
With either inline, WCCP, or Forward Proxy deployments on the Barracuda Web Filter 910 and 1010 running version 7.0
and higher.
The Barracuda Web Filter can be configured for scanning of HTTPS traffic at the URL
level when the SSL Inspection feature is enabled. This means that the administrator
has granular control over what applications are blocked or allowed on websites like
Google.com. The administrator can control Google Apps traffic, for example, by
specifying domain/sub-domain patterns associated with Google Apps to be inspected
over HTTPS. With SSL Inspection,the Barracuda Web Filter can apply policies
granularly to HTTPs traffic at the URL level as well as detect malware and viruses. For
more information about this feature, see Using SSL Inspection With the Barracuda Web
Filter.This article provides several use cases as examples.
In this article:
en
Enable and Configure SSL Inspection
Use Case #1 – Allow Most Google Apps, While Blocking Google Wallet and Google
Notebook for Students
Use Case #2 – Blocking Personal Gmail
Use Case #3 – Blocking Personal Gmail, While Allowing Business Gmail Access
97
Related Articles
Facebook control over HTTPS
Using SSL Inspection With the
Barracuda Web Filter
How to Configure SSL Inspection
7.0
How to Configure SSL Inspection
6.x
Enable and Configure SSL Inspection
This is the first step for performing granular control of HTTPS applications with the Barracuda Web Filter. The examples in this article use SSL
inspection of the domain Google.com.
1. Log into the Barracuda Web Filter web interface as an administrator.
2. On the ADVANCED > SSL Inspection page, set Enable SSL Inspection to Yes.
3. In the Inspected Domains field, enter Google.com and click Add.
4. Install an SSL certificate. There are two recommended options:
Select Create to generate your own signed SSL certificate and download it to install in or push out to each client browser. If you
don't, users will see a warning each time they browse an HTTPS site when SSL Inspection is enabled. For detailed instructions
on creating and installing the certificate, see How to Create and Install a Self-Signed Certificate for SSL Inspection.
Use the Barracuda Default Certificate for SSL Inspection, available on the ADVANCED > SSL Inspection page. This is the
simpler of the two methods. If you are only using one Barracuda Web Filter (as opposed to clustering two or more systems using
Linked Managemtn), the private key is more secure as it never leaves the device. If you have a high availability deployment, you
will need to install the same root certificate on each Barracuda Web Filter. For detailed instructions on installing the certificate,
see How to Use the Barracuda Default Certificate for SSL Inspection.
Use Case #1 – Allow Most Google Apps, While Blocking Google Wallet and Google Notebook for Students
This scenario allows access to Google Gmail and most other Google Apps, which tend to be accessed via HTTPS. Exceptions to this policy are
blocking Google Notebook and Google Wallet over HTTPS. Since no time frame is specified on the BLOCK/ACCEPT > Exceptions page in this
example, these policies would be enforced by the Barracuda Web Filter 24/7 if configured as shown here.
Step 1. Configure SSL Inspection as described above under Enable and Configure SSL Inspection.
Step 2. Create the Block policy for Google Notebook.
1. Set up users and groups as needed as well as authentication mechanisms. See Managing Users and Groups and How to Choose Your
Authentication Mechanisms.
2. On the BLOCK/ACCEPT > Exceptions page, in the Add Exceptions section, select the Block Action. See Figure 1.
3. Select the type of users you want to block (Authenticated, Local Group, etc.) in the Applies To field. In this case we've chosen the Stude
nts group.
4. Select Web App Control as the Exception Type.
98
Figure 1: Blocking the Students group of users from using Google Notebook
5. From the Web App Name drop-down, select Google Notebook.
6. From the Protocol drop-down, select HTTPS.
7. Click Add.
Step 3. Create the Block policy for Google Wallet.
1. On the BLOCK/ACCEPT > Exceptions page, in the Add Exceptions section, select the Block Action. See Figure 2.
2. Select the type of users you want to block (Authenticated, Local Group, etc.) in the Applies To field. In this case we've chosen the Stude
nts group.
3. Select URL Patterns as the Exception Type.
Figure 2: Blocking Google Wallet for the Students group
4. In the URL Pattern text box, enter wallet.google.com
5. From the Protocol drop-down, select HTTPS.
6. Click Add.
Use Case #2 – Blocking Personal Gmail
Suppose you want block access to personal Google Gmail for users in your organization during working hours Monday through Friday, but allow it
before 8am and after 5pm and all day on weekends. Using the URL pattern for non-business Google Gmail accounts ( https://mail.google.com/ma
il ), you will create a policy on the BLOCK/ACCEPT > Exceptions page.
Step 1. Configure SSL Inspection as described above under Enable and Configure SSL Inspection.
Step 2. Create the policy.
1. On the BLOCK/ACCEPT > Exceptions page, in the Add Exceptions section, select the Block Action. See Figure 3.
2.
99
2. Select the type of users you want to block (Authenticated, Local Group, etc.) in the Applies To field. In this case we've chosen Authentic
ated users.
3. Select URL Pattern as the Exception Type.
4. Enter https://mail.google.com/mail as the URL pattern.
5. Set the Time Frame from 8:00 - 17:00 Mon. - Fri. , or whatever constitutes 'working hours'.
Figure 3: Creating a Block policy for personal Gmail during working hours
6. Select the Protocol as HTTPS. Enter a message if you like to describe what the policy is about.
7. Configure policy alerts as needed. With Enable Policy Alerts set to On, the Barracuda Web Filter will send an email summarizing
content policy violations to the email address(es) entered in the Policy Alerts Email Address field.
8. Click Add.
Use Case #3 – Blocking Personal Gmail, While Allowing Business Gmail Access
Step 1. Configure SSL Inspection as described above under Enable and Configure SSL Inspection.
Step 2. Follow the instructions above to create a Block policy for personal gmail accounts. You don't need to fill in the Time Frame fields
unless you want to only apply the Block during certain hours.
Step 3. Create the Allow policy for business Gmail use.
1. On the BLOCK/ACCEPT > Exceptions page, in the Add Exceptions section, select the Allow Action. See Figure 4.
2. Select the type of users you want to allow (Authenticated, Local Group, etc.) in the Applies To field. In this case we've chosen Authentic
ated users.
100
Figure 4: Creating an Allow policy for business Gmail access 24/7
3.
4.
5.
6.
Select URL Pattern as the Exception Type.
Enter your business email domain name (ex: a1business.com) as the URL pattern.
Leave the Time Frame setting as 00:00 - 24:00 to allow business Gmail access 24/7.
Click Add.
.
Facebook Control Over HTTPS
en
The Barracuda Web Filter can be configured for scanning of HTTPS traffic at the URL
level when the SSL Inspection feature is enabled. This means that the administrator
has granular control over what applications are blocked or allowed on websites like
Facebook.com. The administrator can control Facebook traffic, for example, by
specifying domain/sub-domain patterns associated with Facebook applications to be
inspected over HTTPS. With SSL Inspection,the Barracuda Web Filter can apply
policies granularly to HTTPs traffic at the URL level as well as detect malware and
viruses. For more information about this feature, see Using SSL Inspection With the
Barracuda Web Filter. This article provides several use cases as examples.
Related Articles
Exception Policies 7.x
Exception Policies 6.x
Google Apps Control Over HTTPS
Using SSL Inspection With the
Barracuda Web Filter
How to Configure SSL Inspection
7.0
How to Configure SSL Inspection
6.x
101
SSL Inspection of HTTPS traffic for this use case is available:
With either WCCP or Forward Proxy deployments on the Barracuda Web Filter 610 and higher, running version 6.x and
higher.
With either inline, WCCP, or Forward Proxy deployments on the Barracuda Web Filter 910 and 1010 running version 7.0
and higher.
Use Case #1 – Blocking Facebook Apps
Suppose you want allow access to Facebook.com for students, but want to ONLY allow Facebook Applications (Apps) during school lunch time. U
sing the URL pattern for Facebook Apps (https://apps.facebook.com, https://www.facebook.com/appcenter/ ), you would first
configure SSL Inspection , then create a policy on the BLOCK/ACCEPT > Exceptions page.
Step 1. Enable and configure SSL Inspection:
1.
2.
3.
4.
Log into the Barracuda Web Filter web interface as an administrator.
On the ADVANCED > SSL Inspection page, set Enable SSL Inspection to Yes.
In the Inspected Domains field, enter Facebook.com and click Add.
Install an SSL certificate. There are two recommended options:
Select Create to generate your own signed SSL certificate and download it to install in or push out to each client browser. If you
don't, users will see a warning each time they browse an HTTPS site when SSL Inspection is enabled. For detailed instructions
on creating and installing the certificate, see How to Create and Install a Self-Signed Certificate for SSL Inspection.
Use the Barracuda Default Certificate for SSL Inspection, available on the ADVANCED > SSL Inspection page. This is the
simpler of the two methods. If you are only using one Barracuda Web Filter (as opposed to clustering two or more systems using
Linked Managemtn), the private key is more secure as it never leaves the device. If you have a high availability deployment, you
will need to install the same root certificate on each Barracuda Web Filter. For detailed instructions on installing the certificate,
see How to Use the Barracuda Default Certificate for SSL Inspection.
Step 2. Create the policy:
1. On the BLOCK/ACCEPT > Exceptions page, in the Add Exceptions section, select the Allow Action. See Figure 1 below. Select the
type of users you want to allow (Authenticated, Local Group, etc.) in the Applies To field. In this case we've chosen Authenticated users.
If your set of authenticated users includes teachers, you might want to create a group for students using the USERS/ GROUPS pages
and then select the student group for Applies To.
2. Select URL Pattern as the Exception Type.
3. Enter https://apps.facebook.com, https://www.facebook.com/appcenter as the URL pattern (make sure to include a
comma between URLs).
4. Set the Time Frame from 12:00 - 13:00 Mon. - Fri. , or whatever constitutes 'lunch hour'.
Figure 1: Creating a limited Allow policy for Facebook applications during school lunch hours
5. Select the Protocol as HTTPS. Enter a message if you like to describe what the policy is about.
6.
102
6. Configure policy alerts as needed. With Enable Policy Alerts set to On, the Barracuda Web Filter will send an email summarizing
content policy violations to the email address(es) entered in the Policy Alerts Email Address field.
7. Click Add. You have now created your policy.
Use Case #2 – Blocking Facebook Chat for students
Suppose you want allow access to all Facebook activities except chat for students. Using the URL pattern for Facebook Messages ( https://w
ww.facebook.com/messages ), you would first configure SSL Inspection, then create a policy on the BLOCK/ACCEPT > Exceptions page.
Step 1. Enable and configure SSL Inspection (if not already done):
1.
2.
3.
4.
Log into the Barracuda Web Filter web interface as an administrator.
On the ADVANCED > SSL Inspection page, set Enable SSL Inspection to Yes.
In the Inspected Domains field, enter Facebook.com and click Add.
Install an SSL certificate as described in step 1-4 above.
Step 2. Create the policy:
1. On the BLOCK/ACCEPT > Exceptions page, in the Add Exceptions section, select the Block Action. See Figure 2 below.
Select the type of users you want to allow (Authenticated, Local Group, etc.) in the Applies To field. In this example we've created a
group called Students from the USERS/ GROUPS > Local Groups page, and here, we have selected that group for Applies To.
2. Select URL Pattern as the Exception Type.
3. Enter https://www.facebook.com/messages as the URL pattern.
4. There is no need to set a time frame unless you want to allow access to Facebook chat OUTSIDE the hours you're blocking.
Figure 2: Creating a Block policy for Facebook chat
5. Select the Protocol as HTTPS. Enter a message if you like to describe what the policy is about.
6. Configure policy alerts as needed. In this example, the Message field explains that Policy Alerts were purposely not enabled.
7. Click Add. You have now created your policy.
YouTube Control Over HTTPS 7.x
103
en
Not finished for now. May or may not publish - check with PMs.
The Barracuda Web Filter can be configured for scanning of HTTPS traffic at the URL level when the SSL Inspection feature is enabled. This
means that the administrator has granular control over what applications are blocked or allowed on websites like YouTube.com. The administrator
can control YouTube traffic, for example, by specifying domain/sub-domain patterns associated with YouTube to be inspected over HTTPS. With
SSL Inspection,the Barracuda Web Filter can apply policies granularly to HTTPs traffic at the URL level as well as detect malware and viruses.
For more information about this feature, see Using SSL Inspection With the Barracuda Web Filter 7.0. This article provides several use cases as
examples.
SSL Inspection is supported by the Barracuda Web Filter as follows:
Barracuda Web Filter 610 and higher, running firmware version 6.0.1 and higher (see How to Configure SSL Inspection 6.x)
. Ability to block or monitor many web-based applications and domains over HTTPS.
Barracuda Web Filter 410 running firmware version 7.1 and higher, for Safe Browsing and YouTube for Schools.
Use Case #1: Blocking Channels
Suppose you want allow access to YouTube, but block access to YouTube channels for users in your organization during working hours Monday
through Friday. Using the URL pattern for channels, https://youtube.com/channels, you will create a policy on the BLOCK/ACCEPT >
Exceptions page.
Step 1. Enable and configure SSL Inspection:
1.
2.
3.
4.
Log into the Barracuda Web Filter web interface as an administrator.
On the ADVANCED > SSL Inspection page, set Enable SSL Inspection to Yes.
In the Inspected Domains field, enter youtube.com and click Add.
Install an SSL certificate. There are two options:
a. Select Upload to upload a trusted certificate signed by a CA or from your organization's CA server. Once you install the trusted
certificate on the Barracuda Web Filter, your users can browse HTTPS sites without any warnings when SSL Inspection is
enabled. If you have a high availability deployment, you will need to install the same root certificate on each Barracuda Web
Filter. Note: If you use this option, make sure to upload both the private and public key files. Formats supported include .pem,
der, pkcs12, pkcs7, pfx, but not .jks (java key store).
b. Select Create to generate your own SSL certificate and download it to install in or push out to each client browser. If you don't,
users will see a warning each time they browse an HTTPS site when SSL Inspection is enabled. On the other hand, if you
create the certificate on the Barracuda Web Filter, the private key is more secure as it never leaves the device. If you have a high
availability deployment, you will need to install the same root certificate on each Barracuda Web Filter. Follow instructions in the
online help to create and install the certificate(s).
Step 2. Create the policy:
1. On the BLOCK/ACCEPT > Exceptions page, in the Add Exceptions section, select the Block Action. See Figure 1.
2. Select the type of users you want to block (Authenticated, Local Group, etc.) in the Applies To field. In this case we've chosen Authentic
ated users.
3. Select URL Pattern as the Exception Type.
4. Enter https://www.youtube.com/channels as the URL pattern.
5. Set the Time Frame from 8:00 - 17:00 Mon. - Fri. , or whatever constitutes 'working hours'.
Figure 1: Creating a Block policy for YouTube channels during working hours
104
6. Select the Protocol as HTTPS. Enter a message if you like to describe what the policy is about.
7. Configure policy alerts as needed. With Enable Policy Alerts set to On, the Barracuda Web Filter will send an email summarizing
content policy violations to the email address(es) entered in the Policy Alerts Email Address field.
8. Click Add. You have now created your policy.
Use Case #2: Blocking All YouTube Channels Except Sports
Follow the instructions above to create a Block policy for http://www.youtube.com/channels . Then follow these steps to create the Allow exception
for business Gmail use.
1. On the BLOCK/ACCEPT > Exceptions page, in the Add Exceptions section, select the Allow Action. See Figure 2.
2. Select the type of users you want to allow (Authenticated, Local Group, etc.) in the Applies To field. In this case we've chosen Authentic
ated users.
3. Select URL Pattern as the Exception Type.
4. Enter you business email domain name (ex: a1business.com) as the URL pattern.
5. Leave the Time Frame setting as 00:00 - 24:00 to allow business Gmail access 24/7.
Figure 2: Creating an Allow policy for business Gmail access 24/7.
105
Related Articles
Facebook control over HTTPS
Google Apps Control Over HTTPS
Using SSL Inspection With the Barracuda Web Filter
How to Configure SSL Inspection
Captive Portal Terms and Conditions Page
en
Captive Portal
With the Captive Portal feature, you can control access to the Internet or other networks, presenting a ‘terms and conditions’ page to which the
user must agree before proceeding to browse the web. The user must either agree and/or log in before they are granted access. The Captive Por
tal feature can be enabled on the BLOCK/ACCEPT > Configuration page.
With Captive Portal enabled, the first request from every user will be served a splash page displaying customized terms and conditions, which
you configure on the BLOCK/ACCEPT > Block Message page. Once the user agrees or, for LDAP users, logs in, the page is not presented
again for the duration of the browsing session and the user can view content that is not blocked for that user based on Captive Portal settings and
block/accept policies.These settings allow for applying this feature to certain IP groups and unauthenticated ('guest') users. You can apply
different policies depending on whether the user identifies with LDAP credentials or as a guest. Exclusions for IP groups are also configurable.
Common use cases include:
Hotel or Internet cafe guests – These users tend to be unauthenticated and will browse based as 'guests' based on policies you create for
unauthenticated users.
Employees who bring personal devices to work – BYOD users can use their LDAP credentials to log into the portal and continue to
browse based on policies you apply to authenticated users. You can also configure so that these users can browse as guests
(unauthenticated) when using these devices.
See the BLOCK/ACCEPT > Configuration page for instructions. All traffic for these users is logged.
Creating Block and Accept Policies - with Safe Search info
en
To create exceptions to block and accept policies by user, group, or time frame, see Exception Policies.
In this article:
en
Content filtering
Safe Search
Safe Browsing for Schools
Application Filtering
Non Web-Based Applications
Social Media and Other Web-Based Applications
Web Application Monitoring
Domain filtering
URL pattern filtering
Custom categories filtering
MIME type blocking
IP-based exemption
IP-based blocking
Content filtering
Barracuda web security products employ a comprehensive database of frequently updated categories of website content types. Use the BLOCK/
ACCEPT > Content Filter page to control user access to categories of websites that should be blocked, warned, monitored, or allowed based on
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content. When you block a category, you block all HTTP and HTTPS traffic to the associated URLs in that category.
For example, http://mail.yahoo.com is categorized as a web-based email site. If you want to block users from accessing their web-based email
accounts, block the Web-based Email category.
See Web Use Categories for a listing and definition of content classification.
Safe Search
Safe Search mode prevents a web search engine from displaying objectionable thumbnail images in search results; only filtered thumbnails are
displayed in the search results. To limit Safe Search to specific users, create an exception using the BLOCK/ACCEPT > Exceptions page. For
details, see Safe Browsing / Safe Search - Limiting to Specific Users. The entries in this category include search engines which allow users to
enable or disable Safe Search mode for image searches. If you enable Safe Search through the Barracuda Web Filter, users cannot use the
search engine settings to override this mode. If you only want to enable Safe Search for certain users, select Disable for each search engine
listed in the table, or click the All link. On the BLOCK/ACCEPT > Exceptions page, create an Enable exception for the user or group of users for
whom you want to enable Safe Search.
Important: Safe Search will not work if the search request is encrypted unless the Barracuda Web Filter is configured to inspect or
'scan' SSL traffic. Google Safe Search requires SSL inspection as searches are encrypted. Using Google Safe Search requires
enabling the SSL Inspection feature, which is available for the Barracuda Web Filter 610 and higher in Forward Proxy deployments
only, and for inline deployments with models 910. 1010 and 1011. See Using SSL Inspection With the Barracuda Web Filter for details.
Make sure your Barracuda Web Filter is running version 7.0 or higher. Deployments options for using SSL Inspection include:
For Barracuda Web Filter 610, 810 devices deployed in inline mode, you can enable SSL inspection and configure client web
browsers to explicitly proxy (forward proxy) only https traffic, which can then be inspected. This can be done through an proxy
auto-config file.
Deploy inline with your Barracuda Web Filter 910, 1010 or 1011.
Barracuda Web Filter 610, 810 devices deployed in Forward proxy mode and all model 910, 1010, 1011 devices can be directly
configured to apply SSL inspection and correctly enforce safe search policies.
Safe Browsing for Schools
For educational institutions wishing to use YouTube For Schools filtering, the procedure to configure the Barracuda Web Filter to work
with this tool is detailed in How to Set Up YouTube for Schools.
See Temporary Access for Education 7.0.1 to give teachers and students temporary access to websites, for classroom research, that are
typically blocked.
Application Filtering
Non Web-Based Applications
Use the BLOCK/ACCEPT > Applications page to block or allow specific application traffic over the HTTP (and HTTPS) protocol that is not
browser-based. For example: Skype, Pandora, Adobe Acrobat, FTP.This type of filtering does NOT scan for content. If you need to scan and filter
content, you must enable SSL Inspection. Note, however, that the SSL Inspection feature is only available on the Barracuda Web Filter 610 and
higher, and requires more system resources and installation of SSL certificates to configure. To block/allow specific functions that run within web
applications, such as Facebook games or Skype chat, configure on the BLOCK/ACCEPT > Web App Control page.
For a user to download or use an application, the user’s application needs to communicate with an external server. When you select to block an
application, the Barracuda Web Filter searches for traffic that contains data associated with an application server and then blocks that traffic.
The Barracuda Web Filter Vx virtual machine does
not support application filtering because it cannot be
deployed inline, and application filtering is ONLY
supported by inline deployments.
Exceptions to policies can be created for a specific user or group based on bandwidth quotas, time of day and/or days of the week. For example,
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you might want to allow employees to access certain applications such as Skype, for example, ONLY during lunch hours. See Limiting Access by
Time frames, Time Quotas and Bandwidth Quotas. You can use the applications filter as a pre-emptive measure to protect your network against
malware.
Social Media and Other Web-Based Applications
From the BLOCK/ACCEPT > Web App Control page you can block or allow specific web-based application traffic. For example: Facebook,
LinkedIn, MySpace, Twitter, and others. You can allow or block the entire application or only specific functions that run within these web
applications. For example, you might allow Facebook, but want to block Facebook games and Facebook apps to protect against viruses and
malware.
As another example, you may want to block the IRC application because this type of application can present a security risk to the network. An
infected PC may communicate with the "hacker" through an IRC channel, and the hacker can send commands to the channel instructing bots to
launch an attack. IRC could also be used by a disgruntled employee to launch attacks on other networks or to communicate sensitive information
outside of the network.
You can also use the application blocking feature when you hear about a virus spreading over a specific IM service or tool. In this case, you can
proactively protect your network from the infection by blocking that particular service until the threat has been resolved.
Web Application Monitoring
Use this feature to capture and archive chat, email, user registrations and other social media interactions. The archiving repository can be your
Barracuda Message Archiver, your Microsoft Exchange Server journaling tool or, for example, a system administrator email address.
For example, you might want to allow users in the organization to use Facebook to view and make status updates and use chat, but you want to
capture the content. You might also want to block games, shares and other Facebook apps to protect your network from viruses and malware.
To configure Web Application Monitoring, you'll want to first set up your block/accept policies for web-based applications. Here's the process for
this example:
1. From the BLOCK/ACCEPT > Web App. Control page, in the Application Navigator, check Facebook to allow some or all Facebook
applications.
2. Select the Facebook actions to block and allow and save your changes. In this example, you'd leave chat and status update in the Allow
ed Applications list, moving other applications you want to block, such as shares, games and other apps, to the Blocked Applications l
ist. Save your changes.
3. From the BLOCK/ACCEPT > Web App. Monitor page, enable the application actions whose content you want to archive. In this example,
you would enable Facebook Wall Posts, Chat Message and Private Message. Once you enable any actions on the page, the Barracuda
Web Filter will capture the content from each action, package it as an SMTP message and email it to the Notification Email Address yo
u specify.
Domain filtering
Use the BLOCK/ACCEPT > Domains page to blocklist (block), warn, monitor or whitelist (allow) traffic to specific domains and subdomains. Use
domain whitelists to allow access to domains that belong to categories that are generally blocked. Note that domains that are whitelisted ARE
subject to the MIME type blocking rules you create (see below).Use domain blocklists to restrict access to domains in addition to those specified
in other filtering categories.
Tip
To control access to a domain and all its associated URLs, make sure you enter the domain identifier. For example, www.example.co
m will control access only to the specific URL but example.com will control access to all URLs under the domain.
URL pattern filtering
Use the BLOCK/ACCEPT > URL Patterns page to enter regular expressions or keywords that, if matched to a URL, will block (blocklist), warn,
monitor, or allow (whitelist) that URL. For more information about using regular expressions, refer to Regular Expressions. Note that URLs that
are whitelisted ARE subject to the MIME type blocking rules you create (see below).
Examples:
1. You want to block all websites that contain porn in the URL - enter porn as a blocked pattern. Sometimes spyware applications use
different hostnames but the same domain name, so the URLs appear to be from different hosts. In this case you can enter the domain
name as a pattern to block all URLs on that domain.
2. You want to allow access to example.com but want to block maps.example.com. In this case, specify example.com as an allowed patt
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2.
ern and specify maps.example.com as a blocked URL.
Tip
Run a test on your regular expressions with special characters before you encode them in a pattern filter.
Custom categories filtering
Use the BLOCK/ACCEPT > Custom Categories page to create a custom filter, which can consist of the domain names or built-in web content
categories you select. Custom categories are used in the same way as the built-in filters:
You can apply a custom category to either authenticated or unauthenticated users.
You can define a user- or group- specific exception rule to a custom category policy.
After you define a custom category, allow between five and ten minutes for the Barracuda Web Filter to compile and then fully activate the new
category. To verify that a newly created custom category is active, you can use the Content Filter Lookup facility in the BLOCK/ACCEPT
>Content Filter page, as described in the online help for the BLOCK/ACCEPT > Custom Categories page.
MIME type blocking
Use the BLOCK/ACCEPT > MIME Blocking page to specify standard MIME types that you want to block. Note that websites that are whitelisted
ARE subject to the MIME type blocking rules you create. Many organizations choose to block Internet radio and streaming media because they
add load to the internal network, as well as executable files because they can install viruses and various other malware. To block Internet radio,
which uses MPEG (.mpg, mpega, or .abs) or Microsoft audio (.wav) files, enter audio/x-mpeg or audio/x-wav as blocked MIME types. To block
streaming media, which uses MPEG video, enter video/mpeg or video/x-msvideo as blocked MIME types. To block access to executables (.exe),
enter application/octet-stream as a blocked MIME type.
IP-based exemption
If you want to exempt certain clients or sub-networks from all filtering (including spyware filtering), you can use the BLOCK/ACCEPT > IP
Block/Exempt page and specify the source IP address for those clients under IP and Port Exemptions. For example, if you want to exempt an
executive’s client machine from all filtering, you can do so using the IP address of the client. Similarly, if you want to exempt certain external
devices (such as trusted servers outside the protected network), from all filtering, you can specify the destination IP address and specific port
under IP and Port Exemptions.
Exempted IP addresses will bypass the following block filters:
Content filtering
IM blocking
All types of download blocking
Exempted IP Addresses will bypass ALL filters including spyware and virus filters.
IP-based blocking
To block ALL IP-based URLs, set Block IP Based URLs to Yes on the BLOCK/ACCEPT > URL Patterns page. The default and recommended
value for this setting is No.
If you want to block certain clients or sub-networks from all access, you can use the BLOCK/ACCEPT > IP Block/Exempt page and specify the
source IP address for those clients under IP and Port Exemptions. For example, if you want to block traffic from a suspicious client machine or
email servers or internal web servers, you can do so using the IP address of the client. Similarly, if you want to block certain external devices, you
can specify the destination IP address and specific port under IP and Port Exemptions. Note that when the Barracuda Web Filter is deployed as
a forward proxy, IP block/exempt rules based on request destination are not applied.
Data Pattern Categorization and the Barracuda Web Filter
This feature is available with the Barracuda Web Filter 8.0 and higher.
Administrators are tasked with protecting not only data entering the corporate network,
but also for protecting the data that is exiting the network to the outside world. With so
much data exiting the premises, administrators require an automated way to inspect
the data in real time in order to take appropriate action.
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As data leaves the corporate network through a variety of web based applications, the
network administrator can monitor data patterns for sensitive information to ensure
compliance with corporate policies. In addition to monitoring and alerting of flagged
specific data elements such as credit card numbers, social security numbers, privacy
terms, and HIPAA compliance terms, the administrator can also define Regular
Expressions to identify certain patterns in the data.
Related Articles
Regular Expressions
How to Configure Web Application
Monitoring
Example Use Cases of Applying Data Pattern Categorization
Set data pattern categorization policies against the web-based applications listed on the BLOCK/ACCEPT > Web App Monitor page.
Select what gets monitored for archiving and tracking for suspicious keywords on the BLOCK/ACCEPT > Web App Monitor page.
Set an email address to which data pattern categorization alerts should be sent. An alert email will be sent whenever such a warning is
produced.
Select from a predefined set of filters to quickly set up a set of data pattern categorization policies. These predefined filters include credit
card numbers, Social Security numbers (U.S.), privacy (birthday and driver’s license, U.S.), and HIPAA.
Credit Card: AMEX, DINER, DISCOVER, ENROUTE, CHASE, MC, VIS, VOYAGER
Social Security: Social Security Number (United States format)
Privacy: birth date, Driver’s License (United States format), expiration date, phone number
HIPAA: address, birth date, Driver’s License, expiration date, phone number
Managing Users and Groups
en
In this Section
Creating Users and Groups
How to Choose Your Authentication Mechanisms
How to Integrate the Barracuda Web Filter With a User Authentication Service
How to Configure Proxy Authentication for Chromebooks and Other Remote Users
About the Barracuda DC Agent
Role-based Administration 7.x
Role-based Administration 6.x
Wireless Access Point Integration
Creating Users and Groups
en
In this article:
en
Local Users
Domain Users
Creating Local User Accounts
Viewing and Managing Accounts
Creating Local Groups
Creating IP Address Groups
Assigning Policy to LDAP Organizational Units
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Related Articles
How to Integrate the Barracuda
Web Filter With a User
Authentication Service
How to Configure Kerberos
Authentication
The Barracuda Web Filter distinguishes between two basic classes of the users who access websites and web applications from client machines
that it has been configured to protect: local users and domain users.
You can apply filtering and blocking policies as well as exception rules to both classes of users, and, with several user authentication methods to
chose from in the Barracuda Web Filter, you can apply such rules and policies to specific users, groups, LDAP organizational units (OUs) or
machines. Authentication options are addressed below.
You can also view the following information about both local users and domain users:
Account details
Traffic Log
Applications Log
Warned Activity
Reports output
Local users are shown as anonymous until they authenticate in the Barracuda Web Filter system by providing login information in order to
proceed to a blocked or warned web page or application.
Domain users are shown as anonymous until they become authenticated in the Barracuda Web Filter system by providing credentials to their
respective authentication service that has been integrated with the Barracuda Web Filter. Authenticated domain users are shown by username,
client IP address, and group membership.
In some cases, you may need to create local accounts as well as enable your Barracuda Web Filter to look up domain accounts. For example, if
your regular employees have LDAP accounts but contract employees do not, then you might need to create local accounts for the contractor
employees.
Local Users
You can define Local users by listing their existing usernames in the USERS/GROUPS > New Users page. The Barracuda Web Filter
authenticates these users from its local database. To apply Web filtering policies (and exception rules to your filtering policies) to multiple local
users, you can assign local users to local groups that you define in the USERS/GROUPS > Local Groups page.
You can also create IP subnet-based groups - i.e. groups of users who access websites and web applications from client machines within specific
ranges of IP addresses. Define IP subnet-based groups of local users in the USERS/GROUPS > IP Groups page.
Domain Users
The Barracuda Web Filter can authenticate domain users using your existing authentication service. You can integrate the Barracuda Web Filter
with any of the following types authentication servers:
LDAP
NTLM
Kerberos
Doing so enables you to apply web filtering policies and policy exceptions to your domain users without having to re-create local accounts for
these users.
Creating Local User Accounts
Use the USERS/GROUPS > New Users page to create a local database of users that the Barracuda Web Filter will authenticate. If you want
users to be authenticated using your existing user authentication service instead, go to the USERS/GROUPS > Authentication page and enter
the information for your authentication server.
Local user accounts cannot be used to log into the web interface. You can only use the default admin account to log into the web interface.
If you want a new user account to be a member of a group, be sure the group already exists on the USERS/GROUPS > Local Groups page.
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Viewing and Managing Accounts
The USERS/GROUPS > Account View page displays all the user accounts that have either been created locally on your Barracuda Web Filter or
which reside in your LDAP database. This page lets you view details about each account and make the following changes to any locally created
accounts:
Edit a local account by assigning it to a group or enabling/disabling the account
Change the password of a local account
Delete a local account
To quickly locate a specific account, use the filter feature at the top of the page to search for specific patterns in the account details.
Creating Local Groups
Use the USERS/GROUPS > Local Groups page to create groups for your local users. The most common reason to create a group is so you can
apply an exception policy to multiple users at the same time instead of to individual users. For example, you can create a Finance group and
create a policy that allows members of that group to browse financial sites, while blocking those sites from other users on the network.
To create a group, enter the group name in the provided field and click Add. To assign an existing user to this group, go to the USERS/GROUPS
> Accounts View page and click Edit next to the account that you want to join the group. A user can belong to multiple groups.
When you navigate to the USERS/GROUPS > Local Groups page, the Barracuda Web Filter will only display groups for which you
have created an exception. For this reason, it is possible that you won't always see all groups associated with users. To refresh the
Groups list, click the Sync Now button in the Group Membership Synchronization section of the USERS/GROUPS > Authentication
page.
Note that the Sync Now button will only be displayed on that page if you have configured an LDAP, NTLM or Kerberos server..
Creating IP Address Groups
The USERS/GROUPS > IP Subnets/Groups page lets you create a group for a single or range of IP addresses. The most common reasons to
create an IP group is to apply an exception policy to:
Multiple users on the same subnet. In this case, enter the subnet mask for the subnet in the provided field.
A static IP address. In this case, enter the static IP address in the provided field.
After you enter the IP address or subnet mask and click Add, you can assign an exception policy to the IP group on the BLOCK/ACCEPT >
Exceptions page.
Assigning Policy to LDAP Organizational Units
If you are using an Active Directory or other LDAP server, you can create policy exceptions for individual members of an organizational unit or for
the entire unit. The Barracuda Web Filter can lookup the organizational units defined on your server after you have configured the server(s) on the
USERS/GROUPS > Authentication page. See the Applies To field on that page in the Add Exception section. You can select the server, then
click the Lookup button to view OUs in your server.
How to Choose Your Authentication Mechanisms
en
In this section:
How to Configure Kerberos Authentication
How to Enable LDAP Domain User Authentication
How to Enable NTLM Domain User Authentication
Below are some use case scenarios to help you decide which authentication scheme(s)
to configure on your Barracuda Web Filter. Each example addresses a particular type
of environment:
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Related Articles
How to Configure Kerberos
Authentication
How to Enable NTLM Domain User
Authentication
Proxy Authentication for
Chromebooks and Other
Off-Network Users
Example 1: Fat clients (standard desktops) using Active Directory
Step 1: Configure LDAP authentication, as described in How to Enable LDAP Domain User Authentication, on the Barracuda Web Filter and
synchronize group membership information with your domain controllers (Active Directory servers). This provides a manual way for users to
authenticate on the Barracuda Web Filter so you can track user browsing activity.
Step 2: If you want to use single sign-on, install and configure the DC Agent on every domain controller as described in How to Get and Configure
the Barracuda DC Agent. For an overview, see About the Barracuda DC Agent.
Example 2: Using only Citrix or other terminal environments
Step 1: Configure NTLM or Kerberos so that the Barracuda Web Filter can join the domain. Reasons for choosing NTLM versus Kerberos are
discussed below.
Step 2. Force users to use the Barracuda Web Filter as a proxy server that provides authentication and single sign-on. See Forward Proxy
Deployment of the Barracuda Web Filter for details on proxy deployment.
Example 3: Mix of fat clients and Citrix or other terminal environments
Configure per examples 1 and 2. The articles in this section, linked above, further explain reasons and requirements for employing these various
authentication schemes.
Exempting selected LDAP domain users from filtering
To exempt LDAP domain users from policy engine processing, on the USERS/GROUPS > Authentication LDAP tab, navigate to the DC Agent
Configuration section where exempt user names can be entered. An example use case for this feature is to prevent traffic caused by script logic
or other background users from appearing in the traffic log.
NTML Versus Kerberos
Kerberos is an authentication protocol that provides mutual authentication; i.e. both the user and the server verify each other's identity. For this
reason, Kerberos is considered a more secure authentication protocol than NTLM. Implementing Kerberos-based authentication within your
network will allow the Barracuda Web Filter to associate outgoing web requests with Active Directory users, log user activity, and apply
user-specific or group-specific policies to outgoing connections without requiring users to log into the Barracuda Web Filter.
Kerberos is useful when a Microsoft domain controller is running in native mode. It is a Forward Proxy authentication scheme and the Barracuda
Web Filter need not verify each authentication request against a domain controller. See How to Configure Kerberos Authentication for more
information about Kerberos.
If your network uses an NT LAN Manager (NTLM) authentication server, your NTLM domain users transparently become authenticated in the
Barracuda Web Filter using their Microsoft Windows credentials. This single sign-on (SSO) method of access control is provided by transparent
proxy authentication against the your NTLM server.
To enable transparent proxy authentication against your NTLM server, you must join the Barracuda Web Filter to the NTLM domain as an
authorized host. The process of joining the domain also synchronizes NTLM group information from your domain controller to the Barracuda Web
Filter. Configure NTLM authentication on the USERS/GROUPS > Authentication page NTLM tab. See How to Enable NTLM Domain User
Authentication for more information about NTLM.
How to Configure Kerberos Authentication
en
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This solution applies to all Barracuda Web Filters running firmware
version 4.2 and higher. Windows 2000 and later platforms use Kerberos
as the native authentication method.
Related Articles
How to Integrate the Barracuda
Web Filter With a User
Authentication Service
When to use Kerberos Authentication
Use Kerberos with the Barracuda Web Filter in any of the following scenarios:
Clients are behind a NAT-enabled router - Requests from users on client machines behind a NAT-enabled router would appear to the
Barracuda Web Filter to be sent from the same reusable NAT Router IP address.
Windows Terminal Services — Requests from users using Windows Terminal Services to access remote data and applications on
another client machine would appear to the Barracuda Web Filter to be sent from the Windows terminal IP address.
Citrix Presentation Services — Requests from users accessing remote data and applications on a Citrix Presentation Server would
appear to the Barracuda Web Filter to be sent from the Citrix Presentation Server.
Requirements for using a Kerberos authentication server
Before you integrate with a Kerberos authentication server, please verify the following requirements:
The Barracuda Web Filter must be deployed as a forward proxy. For more information on deploying your Barracuda Web Filter as a
forward proxy, please refer to Forward Proxy Deployment of the Barracuda Web Filter.
The only other authentication service you may configure, in addition to Kerberos, is LDAP. This is called Hybrid Authentication Mode.
No Barracuda DC Agents are required if only using Kerberos authentication, but will be required if using Hybrid Authentication
Mechanisms with LDAP as described below.
Web browsers must support Kerberos (Internet Explorer version 7 or Firefox version 3) and must be configured to use the Barracuda
Web Filter as an HTTP proxy.
Client workstations and the Barracuda Web Filter must have properly configured DNS resolution mechanisms. DNS servers must be able
to resolve IP addresses in both forward and reverse.
All host machine clocks must be synchronized within 5 minutes of the Kerberos server clock.
All users must have domain logon credentials, generally speaking; however, non-domain machines can use Kerberos authentication
provided that Kerberos is configured correctly on those machines.
Implementing Kerberos
Follow these steps to create your Kerberos service on the Barracuda Web Filter:
1. Set your Default Domain and Default Hostname on the BASIC > IP configuration page. On your DNS server(s), add an entry (both
forward and reverse mappings) for your Barracuda Web Filter.
2. On the Kerberos tab of the USERS/GROUPS > Authentication page, enter the Realm, or Windows administrative domain name.
3. On that page, in the KDC field, enter the fully qualified domain name (FQDN) of the Key Distribution Center server for the realm you
specified. This is typically the FQDN of your domain controller.
4. Enter the Username and Password of an account that has administrative privileges on your Active Directory server. Do not include the
domain name in the Username entry. For example, if the Username is administrator, simply enter administrator.
5. Click the Add button to create the new Kerberos service. Once you do this, the service should appear as type Kerberos in the Existing
Authentication Services table on the USERS/GROUPS > Authentication page on the Kerberos tab.
6. Ensure that the Barracuda Web Filter's FQDN (not the IP) and port 8080 are configured as an HTTP proxy on all users' browsers.
Note that implementing Kerberos Authentication will restrict some configuration options, as follows:
No login override of blocked pages: When a policy on the Barracuda Web Filter blocks Internet access for a user, that user will not be
offered login fields at the bottom of the block message page, even if Allow Login Override of Blocked Pages is enabled on the BLOCK
/ACCEPT > Configuration page.
No logout option: Users cannot log out when proceeding to a blocked page in order to surf anonymously. More precisely, when a policy
on the Barracuda Web Filter blocks Internet access for user, that user will not be offered a logout option at the bottom of the block
message page, even if the Offer Logout option on the BLOCK/ACCEPT > Configuration page is enabled.
Users are not displayed in the USERS/GROUPS > Account View page when authenticated via Kerberos.
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Hybrid Authentication Mechanisms
Hybrid authentication, in this case, means using EITHER Kerberos or NTLM authentication along with LDAP, but not both. This enables you to
deploy the Barracuda Web Filter both in inline mode for one group of users and in forward proxy mode for another group of users. This is useful if
you want to apply different browsing policies to two different user groups.
For example, if you configure LDAP with Single Sign-On for one group of users and Kerberos authentication for another group of users, each
group will receive a pop-up window indicating access denied to blocked sites, but the LDAP group will be able to bypass the block page by
logging in with their LDAP credentials. The Kerberos group will not be able to bypass the block page.
For hybrid authentication, configure LDAP and either NTLM or Kerberos authentication services as usual. Connect the LDAP group to the
LAN/WAN bridge on the Barracuda Web Filter. For the Kerberos or NTLM users, configure browsers to proxy traffic to the Barracuda Web Filter
IP address and the proxy port 3128. See Inline Pass-Through (Transparent) Mode Deployment and Forward Proxy Deployment of the Barracuda
Web Filter for more information on these two types of deployments.
About Kerberos Authentication
Kerberos is an authentication protocol that provides mutual authentication; i.e. both the user and the server verify each other's identity. For this
reason, Kerberos is considered a more secure authentication protocol than NTLM. Implementing Kerberos-based authentication within your
network will allow the Barracuda Web Filter to associate outgoing web requests with Active Directory users, log user activity, and apply
user-specific or group-specific policies to outgoing connections without requiring users to log into the Barracuda Web Filter.
Kerberos is useful when a Microsoft domain controller is running in native mode. It is a Forward Proxy authentication scheme and the Barracuda
Web Filter need not verify each authentication request against a domain controller.
How to Enable LDAP Domain User Authentication
en
If your network uses a Lightweight Directory Access Protocol (LDAP) or Active Directory authentication (AD) server, your LDAP domain users can
use the LDAP or AD authentication service to be authenticated in the Barracuda Web Filter system. The Barracuda Web Filter can also enable
you to look up users by organizational units you have defined on your LDAP server when creating exceptions to block/accept policy.
To enable LDAP user authentication, from the USERS/GROUPS > Authentication page, in the LDAP tab, provide information about connecting
to the LDAP server, binding to the LDAP server, encryption type and LDAP attributes. See the online help for detailed steps.
To configure proxy authentication through LDAP for remote users such as students with Chromebooks, and other off-network users, see How to
Configure Proxy Authentication for Chromebooks and Other Remote Users.
How to Enable NTLM Domain User Authentication
en
If your network uses an NT LAN Manager (NTLM) authentication server, your NTLM
domain users transparently become authenticated in the Barracuda Web Filter using
their Microsoft Windows credentials. This single sign-on (SSO) method of access
control is provided by transparent proxy authentication against the your NTLM server.
Note that you can configure NTLM authentication in conjunction with LDAP as well as
running the Barracuda DC Agent on your domain controller(s).
To enable transparent proxy authentication against your NTLM server, you must join
the Barracuda Web Filter to the NTLM domain as an authorized host. The process of
joining the domain also synchronizes NTLM group information from your domain
controller to the Barracuda Web Filter. Configure NTLM authentication on the USERS/
GROUPS > Authentication page NTLM tab.
115
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How to Integrate the Barracuda
Web Filter With a User
Authentication Service
How to Choose Your Authentication
Mechanisms
How to Configure Kerberos
Authentication
Windows Support for NTLM authentication
Windows Server 2000 and Windows 2003 with Active Directory (in mixed mode) run the NTLM authentication protocol by default. In a native
mode Active Directory domain, Windows Server 2003 runs the Kerberos authentication protocol.
Starting with Windows Vista, and also with Windows Server 2008 and Windows 7, both LM and NTLM are de-activated by default. Microsoft
adopted Kerberos as the preferred authentication protocol for Windows 2003 and Windows Server 2008 Active Directory domains. Kerberos is
typically used when a client belongs to a Windows Server domain, or if a trust relationship with a Windows Server Domain is established in some
other way. For more on Kerberos, see How to Configure Kerberos Authentication. However, NTLM can still be used in the following situations:
The client is authenticating to a server using an IP address
The client is authenticating to a server that belongs to a different Active Directory forest, or doesn’t belong to a domain at all
No Active Directory domain exists
For detailed descriptions of these scenarios, see the online help for the USERS/GROUPS > Authentication page.
Requirements for using an NTLM Authentication Server
Before you integrate with an NTLM authentication server, verify the following requirements:
The Barracuda Web Filter must be deployed as a forward proxy.
Kerberos authentication is not already configured.
Web browsers must be configured to use the Barracuda Web Filter as the HTTP proxy.
For detailed descriptions of these requirements, see the online help for the USERS/GROUPS > Authentication page.
Limitations when using an NTLM Authentication Server
The following limitations apply when using an NTLM authentication server with the Barracuda Web Filter:
No login override of blocked pages for NTLM domain users who encounter a block message.
No logout option for NTLM domain users who proceed to a blocked web page.
NTLM domain users are not listed in the Account View page.
NTLM realm is not listed for users listed in the syslog output.
For detailed descriptions of these restrictions, see the online help for the USERS/GROUPS > Authentication page.
How to Integrate the Barracuda Web Filter With a User Authentication Service
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In this article:
en
Granular Policies By Users, Groups or Machines
Applying Web Access Policy by Groups
Terminal Environments and Authentication
LDAP Authentication
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Related Articles
Choose Your Authentication
Mechanisms
Enable NTLM Domain User
Authentication
Configure Kerberos Authentication
Creating Users and Groups
Granular Policies By Users, Groups or Machines
By integrating the Barracuda Web Filter with your existing authentication server, you can configure usage policies at several levels of granularity;
policies can apply to the whole organization or to specific users, machines, or groups. Using LDAP, NTLM, or Kerberos authentication, or a
combination of them, you can apply policies and generate reports directly on users, LDAP organizational units (defined on your LDAP server) or
groups you define without the need to create local user accounts on the Barracuda Web Filter.
Applying Web Access Policy by Groups
Typically, computer users in a network are grouped along organizational, departmental, physical or functional boundaries. As the administrator,
you can create secure accounts for network users and also group them as appropriate. Users then supply their login credentials from their
workstations to activate their network privileges. This allows the administrator to control Internet access privileges separately for each user or
group of users. For example, a school can apply a more restrictive browsing policy for students than for teachers and staff, or an organization can
allow access to job sites only to the Human Resources department (which you may have defined as an organizational unit on your LDAP server).
If you do not integrate with your LDAP, NTLM or Kerberos authentication server, you can apply filtering policy exceptions only to local users and
groups that you create in the USERS/GROUPS tab.
Terminal Environments and Authentication
Kerberos and NTLM authentication schemes work well with Citrix terminal environments and Windows terminal services environments. The
Barracuda Web Filter can also support various user groups using different authentication schemes to provide different types of user access and
policy control. For example, if your organization has a group of Windows desktop users who authenticate against an LDAP server and another
group using a Citrix terminal environment or Windows terminal services environment, you can configure both groups with one Barracuda Web
Filter.
Using a 'hybrid' authentication deployment, Windows desktop users can authenticate inline via your LDAP server, while the terminal users can
authenticate via NTLM or Kerberos in a forward proxy configuration. In the latter setup, each user’s browser will forward their credentials to the
Barracuda Web Filter.
To use a hybrid authentication scheme, add your LDAP and NTLM or Kerberos services as described in the following articles:
How to Choose Your Authentication Mechanisms
How to Enable NTLM Domain User Authentication
How to Configure Kerberos Authentication
Detailed procedural help is also available on the USERS/GROUPS > Authentication page of the Barracuda Web Filter web interface.
LDAP Authentication
LDAP users are authenticated when credentials are provided in order to proceed to a blocked or warned web page or application. LDAP users
can also be authenticated by single sign-on access if you install the Barracuda DC Agent software on your domain controller(s) – see Barracuda
DC Agent for User Authentication for details, or see the Help on the USERS/GROUPS > Authentication page. NTLM and Kerberos users are
authenticated by single sign-on access against the NTLM or Kerberos authentication service, so they are transparently authenticated in the
Barracuda Web Filter using their Microsoft Windows credentials. Authenticated domain users are known by username, client IP address, and
group membership:
Usernames and client IP addresses of authenticated LDAP domain users are visible in the USERS/GROUPS > Account View page, the
Web Log page, the Application Log page and in reporting output.
Group membership information about authenticated domain users is available by opening the Lookup facility (accessed by clicking Look
up button in the BLOCK/ACCEPT > Exceptions page) and using the Active Directory User/Group section of that window.
Note: Domain users that are unauthenticated in the Barracuda Web Filter appear as anonymous users.
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How to Configure Proxy Authentication for Chromebooks and Other Remote
Users
en
This article applies to the Barracuda Web Filter running version 8.0 and higher.
This feature enables network administrators to track and protect their remote users
from accessing objectionable material by enforcing authentication prior to granting web
access. Proxy authentication allows administrators to see what individual users are
doing, create reports and apply appropriate policies.
Protecting User Browsing Off Network
With Proxy Authentication, you can require LDAP authentication for remote/mobile
users who are either local users or are in your LDAP server, but are browsing outside
of the network. This means that you can configure your Barracuda Web Filter such that
there are no unauthenticated users. When LDAP users with mobile devices or
Chromebooks, for example, go off network, and their browser is configured to proxy
traffic to the Barracuda Web Filter, they are prompted for their network credentials each
time they open a browser. Proxy Authentication supports the aliased LDAP servers you
configure on the USERS/GROUPS > Authentication page.
Related Articles
How to Enforce Proxy Settings On
a Chromebook Using Google Apps
Configure Proxy Authentication
Example: Students using Chromebooks off network
While you can also install the Barracuda Web Security Agent (WSA) on remote laptops and desktops, Chromebooks only have a browser and do
not support the Barracuda WSA. This is a perfect application for proxy authentication, after the Chromebooks browser is configured to proxy web
traffic to the Barracuda Web Filter.
1. Define an LDAP server on the USERS/GROUPS > Authentication page with the alias StudentLDAP, for example.
2. On the USERS/GROUPS >Configuration page, select this alias for the Enable Basic Authentication setting.
When students try to surf the web from their Chromebooks at home, they are prompted with a popup to log in with their LDAP credentials. This
way, their activity is logged by username on the Barracuda Web Filter and is included in reports, even though they are connecting from a public IP
address outside the network.
Delegated Administrators (Read-only, Manage, Monitor, Support) are not allowed to enable Proxy Authentication. The USER/GROUPS
tab is disabled for these users.
Block All Unauthenticated Traffic
With proxy authentication for your off-network users, you can decide to block all unauthenticated traffic if necessary.
About the Barracuda DC Agent
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en
For system requirements and information on how to to get the latest version of the Barracuda DC Agent, see How to Get and
Configure the Barracuda DC Agent.
You can install the Barracuda DC Agent either on the domain controller or on a dedicated Windows PC on the office network. The Barracuda DC
Agent periodically checks the domain controller for login events and to obtain a record of authenticated users. The IP addresses of authenticated
users are mapped to their username and group context. The list of authenticated users is provided to the Barracuda Session Manager on your
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Barracuda Networks product, allowing true single sign-on capabilities.
A typical use case scenario: Alice comes into her office in the morning and logs into her workstation. She enters her user credentials and is
authenticated by the domain controller. The Barracuda DC Agent recognizes that Alice has authenticated herself within the corporate network
domain and forwards this information to all connected Barracuda Networks products. These systems now give Alice access to services or network
areas for which a valid user or Microsoft Active Directory group context is required. Alice does not need to re-enter any credentials because her
initial authentication by Active Directory is reused.
Exclusions
The Barracuda DC Agent lets you manually exclude IP addresses of user client PCs or known multi-user computer systems and provides a
"learning mode" that proposes the exclusion of suspicious systems. Due to the complexity of today's network environments and multi-user
computer systems, a user-to-IP association is not always possible or required. For example, you can exclude the HTTP Proxy and Terminal
Server because they allow multiple users and use a single IP address for authentication against domain controllers.
Remote Monitoring
If you install the Barracuda DC Agent on a dedicated computer system instead of the Active Directory server, you can also remotely monitor
Active Directory.
Logs
The Barracuda DC Agent logs activity to a file named DCAgent.log in the system temp directory, i.e.
%tmp%\DcAgent.log
How to Get and Configure the Barracuda DC Agent
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en
In this article:
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System Requirements
Get and Install the Barracuda DC Agent Version 7.x
Configure the Barracuda DC Agent
DC Agent Logging
Configure your Barracuda Networks Product
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Related Articles
Using the Barracuda DC Agent
With Microsoft Network Policy
Server
About the Barracuda DC Agent
System Requirements
Before configuring the Barracuda DC Agent, make sure that your system meets the following requirements:
The Barracuda DC Agent version 7.1.x replaces all previous versions published. Barracuda recommends using the latest version of the
Barracuda DC Agent. Download the latest version in the Barracuda Customer Portal.
For the Barracuda Web Filter Only:
The Barracuda DC Agent 7.1.x and higher does not support Windows Server 2003. If you are running Windows Server 2003, please
contact Barracuda Networks Technical Support. Otherwise, download the Barracuda DC Agent from the USERS/GROUPS >
Authentication page of the Barracuda Web Filter web interface as described below.
Local Installation – Microsoft Windows Server 2008, 2008 R2, 2012 or 2012 R2. Windows Server Core is not supported for local
installation and monitoring. The DC Agent can, however, communicate with a domain controller that is running Windows Server Core. In
this case, you could install the DC Agent on a server running Microsoft Windows Server 2008, 2008 R2, 2012 or 2012 R2, and configure
it to remotely monitor a domain controller that is running on a Windows Server Core machine.
Remote Installation – Microsoft Windows 2008 and higher. Also note that, for the remote installation of DC Agent, you MUST be a
domain member to query the server.
For remote monitoring of domain controllers, the Barracuda DC Agent Active Directory Profile must be provided with a
domain controller user with administrative privileges.
Get and Install the Barracuda DC Agent Version 7.x
You can install the Barracuda DC Agent directly on the domain controller or on a dedicated Windows PC within your network environment. To
monitor wireless device logins using Windows Network Policy Server (NPS) log events, see Using the Barracuda DC Agent with Microsoft
Network Policy Server.
For the Barracuda Web Filter:
1. Log into the web interface as admin and download the Barracuda DC Agent from the USERS > Authentication page using the Barracu
da DC Agent (Download/Install) link at the bottom of the screen.
2. Launch the installation file (DCAgent.exe) and follow the instructions in the wizard.
For the Barracuda NG Firewall:
1.
2.
3.
4.
5.
6.
7.
Get the Barracuda DC Agent from your Barracuda Cloud Control Account.
While logged into your account, go to the Support > Downloads page.
From the Product list, select Barracuda NG Firewall.
Select Fulltext, enter Barracuda DC Agent, and then click Search.
Download the latest Barracuda DC Agent version that is compatible with your system.
Launch the installation file and follow the instructions in the wizard.
Confirm that Logon Events are monitored by your domain controller:
a. Open Domain Controller Security Policy (Start > Programs > Administrative Tools).
b. Click Local Policies.
c. For Audit account logon events and Audit logon events, make sure that the Policy Settings column displays Success.
Configure the Barracuda DC Agent
After the Barracuda DC Agent is installed and running correctly, launch the application and complete the following steps. Note: Your entries in the
DC Agent interface will NOT be saved until you click the Save button.
1. Define location and login credentials for your Active Directory. Click the Active Directories tab and click the green + sign to add a
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1.
domain.
a. Select Local if you installed the DC Agent on the Domain Controller; select Remote if you installed on another machine on the
network.
b. If you selected Remote, enter the Fully Qualified Domain Name (FQDN) in the Host field.
c. Enter a name for referring to the domain, e.g. 'Finance', 'Salesnet', etc.
d. The Username should be associated with permissions to run WMI queries on the domain controller. Enter that user's Password
and click OK.
For remote monitoring of domain controllers, the Barracuda DC Agent Active Directory Profile must be provided with
a domain controller user with administrative privileges.
e. Click Test to verify connectivity with the domain controller.
2. Add the internal IP Address and a Description for each Barracuda Networks appliance (Barracuda Web Filter, NG Firewall, etc. –
hardware or virtual) with which you want to use the DC Agent.
3. On the Filters tab, specify the IP Address for any client PCs or networks for which you don't want the DC Agent to capture and send
login information to your Barracuda Networks products. These are exceptions and associated login events will be ignored by the DC
Agent.
4. On the Settings tab, configure the following:
Appliance Listening Port – If required, you can change the TCP listening port. Make sure that you also specify the same port
on all configured Barracuda Networks products. Default is port 5049.
Debug Log Level:
0 = log errors only
1 = informational
2 = verbose (most information logged)
Group Options (Barracuda NG Firewall only) – select which option best fits your logging requirements. If group information is
required for authenticated users, select one of these group name types.
Cache groups for: Amount of time, in minutes, to allow the DC Agent to rely on cached login information. Since users will most
likely log in once/workday, the default time is 480 minutes, or 8 hours. The shorter this time is, the more often the DC Agent will
retrieve login event information from the domain controller and pass it to the Barracuda Networks product, which requires more
processing overhead.
DC Agent Logging
Typically you'll only need the Log upon first install of the DC Agent to make sure everything is working as expected. Note that, if you were
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previously running another version of the DC Agent, that data logged while the old agent was running will no longer show in the user interface log
window. That data is still, however, in the database and will appear in reports as usual. To monitor wireless device logins using Windows Network
Policy Server (NPS) log events, see Using the Barracuda DC Agent with Microsoft Network Policy Server.
Configure your Barracuda Networks Product
To ensure that your Barracuda Web Filter or Barracuda NG Firewall can communicate with the Barracuda DC Agent, you must configure the
product as well.
For the Barracuda Web Filter, see the online help on the USERS > Authentication page in the web interface.
For the Barracuda NG Firewall, see How to Configure the MSAD DC Client.
Using the Barracuda DC Agent With Microsoft Network Policy Server
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Microsoft Network Policy Server (NPS) performs centralized authentication,
authorization, and accounting for wireless, authenticating switch, remote access dial-up
and virtual private network (VPN) connections. With the Barracuda DC Agent, you can
also log the IP addresses and AD identities of wireless users in the organization by
monitoring the NPS logs if the following requirements are met:
The Barracuda DC Agent is installed locally on the NPS server.
The wireless access points (WAPs) in the environment are configured to use
RADIUS authentication against the NPS server on which the DC Agent is
installed.
The WAPs must be configured to send RADIUS accounting information, i.e.
not merely RADIUS authentication information. The reason is that the framed
IP address attribute of the RADIUS session contains the user's IP address,
and that information is only contained in the accounting information.
The NPS log must be in the default location (C:\Windows\system32\LogFiles)
and in the default format ("ODBC (Legacy)"), with the log file rotation set to Mo
nthly, or the Barracuda DC Agent will not be able to monitor the log.
To change the logging properties, see the Microsoft article http://technet.micro
soft.com/en-us/library/ee663944(v=ws.10).aspx.
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Related Articles
Microsoft Network Policy Server
How to Get and Configure the
Barracuda DC Agent
Note that DC Agent's normal operation allows for installation either locally or remotely, and this configuration requires local installation on the NPS
server. The NPS server does not need to be a domain controller (DC). If you also want to pick up logins from workstations and other sources, you
will need to either install the DC Agent on a DC or add a remote Active Directory (AD) connection to the instance of the DC Agent running on the
NPS server.
Configure your Barracuda appliances (e.g.Barracuda Web Filter, Barracuda NG Firewall, etc.) as you normally would so that the device can
collect the logins harvested from the NSP log by the DC Agent.
This feature is automatically enabled in the DC Agent – if it finds NPS logs, it will automatically monitor them. Log entries for NPS-related events
are prefixed with "NPS: ", and increasing the log verbosity (Debug Log Level) will log additional NPS-related information for troubleshooting
purposes.
The only necessary configuration to perform in the DC Agent interface is in the Log File Properties on the Log File tab. You must select the OD
BC (Legacy) format:
Due to limitations in the RADIUS protocol, the DC Agent does not track when a user "logs out" of the wireless environment, so the IP
address associated with that wireless user will remain associated with them until it is re-used by a new AD user or until the appliance
times out the session. This timeout interval is configurable on the appliance.
Note also that there may be a delay in between when a user authenticates to RADIUS and when a user's identity is available to their
appliance(s) since many devices have a RADIUS accounting interval.
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Role-based Administration 7.x
en
This article applies to the Barracuda Web Filter running firmware version 7.0 and higher. For information that applies to version 6.x,
see Role-based Administration 6.x.
The administrator of the Barracuda Web Filter might choose to delegate certain administrative tasks such as scheduling and/or running reports,
viewing status and log pages, or creating exceptions to policy.
On the ADVANCED > Delegated Admin page, you can create and manage account roles for existing users. You can use the Limit Access To s
etting to further restrict access for an account to data associated with local users, local groups and/or IP groups. The roles are enumerated below.
To enable users with these roles to log into the Barracuda Web Filter using their LDAP credentials, check the Use LDAP Authentication box on
the page. Alternatively, you can assign a username and password to the role when you create it on the ADVANCED > Delegated Admin page.
The Policy Alerts feature enables you to have the Barracuda Web Filter send an email alert to any role you specify, summarizing authenticated
users who violate policy. The message will summarize actions (Warn, Block or Monitor) by the top violators of policies configured on the BLOCK/
ACCEPT > Content Filter page and on the BLOCK/ACCEPT > Exceptions page. For details on configuration, see Policy Alerts.
Roles and Permissions
Administrator
The administrator role has all permissions and is the only role that can create policies. The Limit Access To setting does not apply.
Read Only
This is the most restricted role, including access to all tabs in read-only mode and viewing (running, but not scheduling) reports. The Limit
Access To setting does not apply. This role does not enable changing any settings.
Manage
The Manage role can view Status and Log pages, view and schedule reports and create exceptions on the BLOCK/ACCEPT > Exceptions page.
All other BLOCK/ACCEPT tabs are read-only. The following pages are disabled:
USERS/GROUPS
ADVANCED
BASIC > IP Configuration
BASIC > Administration
The Limit Access To setting applies.
Monitor
This role can view Status and Log pages and can view and schedule reports. All BLOCK/ACCEPT pages are read-only. The following pages are
disabled:
USERS/GROUPS
ADVANCED
BASIC > IP Configuration
BASIC > Administration
The Limit Access To setting applies.
Support
For users in a helpdesk type of position, the Support role enables viewing Status and Log pages as well as reports, but this role cannot schedule
reports. The Support role can create exceptions on the BLOCK/ACCEPT > Exceptions page, but all other BLOCK/ACCEPT tabs are read-only.
The following pages are disabled:
USERS/GROUPS
ADVANCED
BASIC > IP Configuration
BASIC > Administration
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Use Cases for Various Roles
Monitoring and Reporting: Use the Read Only role for the user who will be monitoring status and running (but not scheduling) reports
on the Barracuda Web Filter. This role cannot change any settings.
Monitoring, Reporting and Creating Exceptions: The Support role is designed for the Helpdesk person in the organization who
provides daily reporting and monitoring of set policies for the administrator who has delegated these tasks. Unlike the Read Only role,
this role can also create exceptions to policies as directed by the administrator.
Users are blocked from websites they need to access: The Manage role can create exceptions to policy for block, warn, monitor or
allow actions that have been set for various domains or categories of domains. For example, job search websites may be blocked for
most employees, but certain members of the HR department need to access them. This role can make an Allow exception for a Local
Group such as HR Managers (see USERS/GROUPS > New Users and USERS/GROUPS > Local Groups to assign users to groups) to
access the Job Search & Career Development sub category of domains .
Support for performance or connectivity issues: The Support role can view the BASIC > Status page to check performance statistics
and note if there are any red indicators on throughput, system load or report/log storage.
Related Articles
Audit Log
Role-based Administration 6.x
en
This article applies to the Barracuda Web Filter running firmware version 6.x. For information that applies to version 7.0 and higher,
see Role-based Administration 7.x.
The administrator of the Barracuda Web Filter might choose to delegate certain administrative tasks such as scheduling and/or running reports,
viewing status and log pages, or creating exceptions to policy.
From the ADVANCED > Delegated Admin page, you can create and manage account roles for existing users. You can use the Limit Access To
setting to further restrict access for an account to data associated with local users, local groups and/or IP groups. The roles are enumerated
below. To enable users with these roles (except the Temporary Whitelist role, which does not log into the system) to log into the Barracuda Web
Filter using their LDAP credentials, check the Use LDAP Authentication box on the page.
The Policy Alerts feature enables you to have the Barracuda Web Filter send an email alert to the Policy Alert Email Address you specify with a
summary of authenticated violators of policy (Warn, Block or Monitor actions taken) based on content filters. The message will summarize actions
by the top violators based on settings on the BASIC > Administration page. From the ADVANCED > Delegated Admin page you can specify
any role(s) to receive alerts by clicking Receive Policy Alerts and filling in an email address. You can alternatively configure the recipient on the
BASIC > Administration page. See Policy Alerts for more information.
Roles and Permissions
Administrator
The administrator role has all permissions and is the only role that can create policies. The Limit Access To setting does not apply.
Read Only
This is the most restricted role, including access to all tabs in read-only mode and viewing (running, but not scheduling) reports. The Limit
Access To setting does not apply. This role does not enable changing any settings.
Manage
The Manage role can view Status and Log pages, view and schedule reports and create exceptions on the BLOCK/ACCEPT > Exceptions page.
All other BLOCK/ACCEPT tabs are read-only. The following pages are disabled:
USERS/GROUPS
ADVANCED
BASIC > IP Configuration
BASIC > Administration
The Limit Access To setting applies.
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Monitor
This role can view Status and Log pages and can view and schedule reports. All BLOCK/ACCEPT pages are read-only. The following pages are
disabled:
USERS/GROUPS
ADVANCED
BASIC > IP Configuration
BASIC > Administration
The Limit Access To setting applies.
Support
For users in a helpdesk type of position, the Support role enables viewing Status and Log pages as well as reports, but this role cannot schedule
reports. The Support role can create exceptions on the BLOCK/ACCEPT > Exceptions page, but all other BLOCK/ACCEPT tabs are read-only.
The following pages are disabled:
USERS/GROUPS
ADVANCED
BASIC > IP Configuration
BASIC > Administration
Temporary Whitelist
This role has the unique purpose of providing authority to one or more specified users, groups or (LDAP) organizational units for temporary
override of block policy for certain websites. This is helpful in situations in which you don’t want to give the user a login to the Barracuda Web
Filter, but you want them to be able to temporarily override block policies, perhaps for other users such as students or coworkers. When you
create this role, you must choose one of these authentication methods:
Enter a Username and Password on the ADVANCED > Delegated Admin page that the selected user(s) must use to override block
pages. The user must then keep these credentials secure for their own use.
Check Use LDAP Authentication to require a user to enter their LDAP credentials for overriding block pages. If using this authentication
option, it’s best to also use the Limit Access To drop-down to select the user(s), group(s) or LDAP organizational unit(s) who can
override block pages.
If you create this role, then the next time a user is blocked, the block page will include a Request Override button. Clicking this button launches a
form below the block page with Username and Password fields as well as radio buttons to specify either allowing the specific site or the entire
category of sites to which the URL belongs. The authorized user would then enter either the Username and Password you create on the ADVAN
CED > Delegated Admin page or their LDAP credentials, depending on how you configured the role. You can also specify the Access Duration,
allowing access the site or category of sites for a specific time frame.
Note that you MUST create a Temporary Whitelist role before you’ll see the Request Override button on the block page that allows for the login
and block override for this role.
Use Cases for Various Roles
Monitoring and Reporting: Use the Read Only role for the user who will be monitoring status and running (but not scheduling) reports
on the Barracuda Web Filter. This role cannot change any settings.
Temporary Whitelist: A group of students needs to access websites relative to a science class on reproduction, but those sites are
typically blocked by policy. The teacher can be given the Temporary Whitelist role login and password or use their LDAP credentials to
log in when a block page comes up. This enables the teacher to allow the blocked site (or the category of sites to which that URL
belongs) for a limited time while the students do research.
Monitoring, Reporting and Creating Exceptions: The Support role is designed for the Helpdesk person in the organization who
provides daily reporting and monitoring of set policies for the administrator who has delegated these tasks. Unlike the Read Only role,
this role can also create exceptions to policies as directed by the administrator.
Wireless Access Point Integration
en
The Barracuda Web Filter 310 and higher running version 8.0 and higher currently supports the Meru
and Ruckus Wireless access points (WAPs) using RADIUS authentication.
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WAPs have become ubiquitous around corporate and academic campuses. These access points are typically connected to an authentication
service such as a RADIUS server, for example, which enables end users to authenticate and gain access to a corporate or campus network. The
WAP integration feature enables end users to surf as authenticated users via the Barracuda Web Filter after authenticating against their WAP.
This means that the user only needs to enter their credentials once.
How WAP Integration Works
Each WAP can be configured to send its syslogs to the Barracuda Web Filter on the network. With WAP integration enabled, the Barracuda Web
Filter listens for system logs coming from each WAP, and then parses the data for the username and IP address of the user that logged in.
Policies you configure on the Barracuda Web Filter are applied to these users, and report data reflects username and IP address pairs for all
logged web traffic.
How to Configure WAP Integration
Use the following steps to configure all WAPs to send syslogs to the Barracuda Web Filter:
1. Go to the USER/GROUPS > Configuration page and, in the Access Point Configuration section, select the wireless provider in the Ac
cess Point Provider drop-down for the WAP that should send logs to the Barracuda Web Filter.
2. The Barracuda Web Filter automatically listens for syslogs from that WAP and parses them to authenticate users that log in.
How to Disable WAP Integration
1. Go to the USER/GROUPS > Configuration page, and select None from the Access Point Provider drop-down.
2. The Barracuda Web Filter will stop listening and accepting syslogs from any WAPs.
3. If there are any users still logged in from the WAP, after disabling WAP integration, those users remain logged in to the Barracuda Web
Filter.
Specific Policies Applied to Groups of Users
Administrators can set content filtering policies based on which WAP the user authenticates through. For example, users who authenticate
through a WAP in the teachers' lounge are able to browse the web with certain privileges. Users who authenticate through a WAP in the library
might be given student-level privileges, such as blocking Facebook or YouTube.
The Barracuda Web Filter can apply content filtering policies based on IP addresses, while the syslog provides the name of the particular WAP.
With WAP integration, the Barracuda Web Filter can track the name of the WAP and the users that authenticate through it.
Delegated Administrators (Read-only, Manage, Monitor, Support) do not have permissions to enable WAP integration. The USER/GRO
UPS tab is disabled for these users, so this feature is not visible.
Filtering Traffic for Offsite and Mobile Users
en
Remote Filtering enables your IT department to provide and control content security beyond the perimeter of the IT infrastructure. For satellite
offices, remote and mobile workers, and students, the Remote Filtering feature allows secure web browsing access from laptops, remote
desktops, iPhones and iPads from any location. Web traffic from these devices will be subject to the same web access and security policies of the
organization. The Remote Filtering feature is available for use with the Barracuda Web Filter model 410 and higher, and is also available with the
Barracuda Web Security Service cloud offering.
Barracuda provides the following solutions for filtering remote traffic to give you flexibility in how you protect your remote and mobile users online:
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Windows-based laptops and desktops – Deploy the Barracuda Web Security Agent (WSA) on each remote desktop or laptop and
proxy all web traffic over the Internet to a specified Barracuda Web Filter, which can monitor web traffic and apply web security policies.
With the Barracuda Web Filter version 7.1 and higher, SSL Inspection is also available for these deployments with the Barracuda Web
Filter 410 and higher. The Barracuda WSA is also available with the Barracuda Web Security Service.
Macintosh OSX computers – Deploy the Barracuda Web Security Agent (WSA) on each Macintosh device and proxy all web traffic over
the Internet to a specified Barracuda Web Filter, which can monitor web traffic and apply web security policies. With the Barracuda Web
Filter version 7.1 and higher, SSL Inspection is also available for these deployments with the Barracuda Web Filter 410 and higher. The
Barracuda WSA is also available with the Barracuda Web Security Service.
Chromebooks – When students and remote workers try to surf the web from their Chromebooks at home or other off-network locations,
they can be prompted to log in with their LDAP credentials. This way, their activity is logged by username on the Barracuda Web Filter
and is included in reports, even though they are connecting from a public IP address outside the network. See the following articles to
configure:
How to Configure Proxy Authentication for Chromebooks and Other Remote Users
How to Enforce Proxy Settings On a Chromebook Using Google Apps.
iOS Devices –
Barracuda Safe Browser: Deploy on iOS mobile devices in place of the native browser, applying the same security policies as
those applied by the Barracuda Web Filter to other users in the rest of your network. If you have a Barracuda Web Filter running
version 6.x or higher, you can deploy and use the Barracuda Safe Browser on mobile devices running on and off of the network.
Also available with the Barracuda Web Security Service.
Barracuda Mobile Device Manager: Manage mobile devices from the cloud, and deploy applications and resources to mobile
devices. The Barracuda Mobile Device Manager Service provides a web interface for the administrator to configure the service,
along with and the Barracuda Mobile Companion application for end users. Protect and apply secure browsing policies for
groups of students, employees, and guests who are using their personal mobile devices inside or outside of your network, or
manage business or institutionally owned devices within your network.
Barracuda Web Security Agent - How it Works 7.1
en
This article applies to version 7.1 of the Barracuda Web Filter and higher.
Filter Traffic From Remote Windows and Macintosh Laptops and Desktops
Use the Barracuda Web Security Agent (WSA) to filter web traffic and ensure safe
browsing for off-network users. When you deploy the Barracuda Web Security Agent
(WSA) on each remote desktop or laptop, all web traffic for those clients is proxied over
the Internet to a specified Barracuda Web Filter, which has been configured to
recognize each remote client by traffic signed by the Barracuda WSA. Browsing
policies created on the Barracuda Web Filter are then applied to that traffic as it is
returned to the client.
You can download the files required to install the Barracuda WSA for Windows or
Macintosh and configure how it filters traffic for your remote users via the ADVANCED
> Remote Filtering page in the Barracuda Web Filter web interface.
Related Articles
How to Install the Barracuda WSA
How to Configure the Barracuda
WSA With the Barracuda Web
Filter
Filtering Traffic for Offsite and
Mobile Users
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The Barracuda WSA works with LDAP authenticated users.
Figure 1: The Barracuda WSA proxies remote users’ web traffic to the Barracuda Web Filter.
When remote users browse the web, all filtering policies configured on the Barracuda Web Filter associated with their Barracuda WSA are applied
to their browsing sessions. The Barracuda WSA intercepts all HTTP/S and FTP traffic through any connection on the remote computer without
regard to the type of web browser. This includes Ethernet, wireless, or dial-up connections. The Barracuda WSA works with the Barracuda Web
Filter to prevent malware from reaching remote computers, and only safe traffic is passed down to their web browsers.
Configuring Settings for the Barracuda WSA
All of the settings mentioned below, except for Policy Lookup Only Mode, can be configured from the Barracuda WSA client using the
Configuration tool. However, each Sync event synchronizes the Barracuda WSA settings to those configured on the Barracuda Web Filter ADVA
NCED > Remote Filtering page. A sync event is triggered by any of the following:
User logging into Barracuda WSA
A network change
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On the Macintosh client - Clicking the Synchronize Settings button in the WSA Preferences; on the Windows client - clicking on the
Barracuda WSA icon in the task tray and selecting Sync to update local settings
For more information about the Configuration tool, see Configuration Tool for Barracuda WSA Windows Client or Configuring Preferences for
Barracuda WSA Macintosh Client.
Exceptions to Filtering with the Barracuda WSA
From the ADVANCED > Remote Filtering page, you can specify domains or subnets that should bypass filtering by the Barracuda Web Filter as
well as any existing proxies on the client’s LAN for which traffic should bypass filtering.
Begin initial configuration of your Barracuda WSA installation by identifying all of your internal IP addresses and proxies, then entering those in
the Bypass Filter and Proxy Exception text boxes on the ADVANCED > Remote Filtering page. This will exempt these IP addresses from traffic
redirection. If you have a PAC or WPAD driven proxy setup, ensure that the proxy hosts are also listed as Proxy Exceptions. Also make sure to
identify the external IP address of your Barracuda Web Filter in the External Hostname/IP field so that the Barracuda WSA can direct user web
traffic to that IP address.
Policy Lookup-Only Mode
In this mode, the Barracuda WSA on the remote user's machine looks up policies configured on the Barracuda Web Filter for that user/client,
applies the policies, then routes allowed web traffic from the user's machine via its usual path to the Internet. Traffic is not routed through the
Barracuda Web Filter.
The advantage of using Policy Lookup Only Mode is that it saves corporate bandwidth and reduces traffic through your Barracuda Web Filter. The
disadvantage is that, since the remote client’s traffic does not pass through the Barracuda Web Filter, virus and malware scanning is not applied
to this traffic. This is an important consideration when deciding whether or not to enable Policy Lookup Only Mode.
To enable this mode, simply set Policy Lookup Only Mode to Yes on the ADVANCED > Remote Filtering page of the Barracuda Web Filter
web interface. Note that when Policy Lookup Only Mode is enabled, you cannot use SSL Inspection (see below).
Application Filtering with the Barracuda WSA
The Barracuda WSA automatically forwards web browser traffic on all ports, and forwards traffic from all other applications on ports 80 and 443.
On the ADVANCED > Remote Filtering page you can specify how the Barracuda WSA filters application traffic by default (Default Filter
Settings):
Filter ports 80 and 443 for all applications,
Filter specified applications and allow all others, or
Filter specified applications and block all others.
If you have specific applications that use other ports, you can add them to the Applications to Filter (All Ports) list on the ADVANCED > Remote
Filtering page. You can also list specific applications to always block, or specific applications to filter.
The Barracuda Web Filter Vx virtual appliance does not support application blocking.
Using SSL Inspection for HTTPS Traffic With the Barracuda WSA
SSL Inspection of Barracuda WSA client traffic is currently only available with the Barracuda Web Filter.
To filter and inspect HTTPS traffic such as Facebook posts, Google search terms, Skype chat and other encrypted traffic at the URL level, you
can enable the SSL Inspection feature:
1. Enable SSL Inspection on the Barracuda Web Filter:
Barracuda Web Filter 410: Go to the BLOCK/ACCEPT > Configuration page to enable SSL Inspection. Download the Root
Certificate For Browsers from the page and install in the browsers of all remote machines running the Barracuda WSA.
Barracuda Web Filter 610 and higher: Go to the ADVANCED > SSL Inspection page to enable SSL Inspection. Download the
Root Certificate For Browsers from the page and install in the browsers of all remote machines running the Barracuda WSA.
2. Synchronize the Barracuda WSA client on all remote machines:
a. On Windows clients: click on the Barracuda WSA icon in the task tray. Sync Settings to synchronize the client with the new
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2.
a.
setting on the Barracuda Web Filter.
b. On Macintosh clients: From the context menu, select WSA Preferences. On the Barracuda Web Filter tab, click the Synchroni
ze Settings button.
Note that SSL Inspection does NOT work when Policy Lookup Only Mode is enabled on the Barracuda Web Filter. For more information about
SSL Inspection, see Using SSL Inspection With the Barracuda Web Filter.
How to Install the Barracuda WSA With the Barracuda Web Filter
en
Barracuda Networks recommends reading this entire article before installing the Barracuda Web Security Agent (WSA). After the
Barracuda WSA is installed and configured, your web traffic is protected by the Barracuda Web Filter automatically. The Barracuda
WSA directs all traffic from web browsers, and other application traffic on ports 80 and 443, to the Barracuda Web Filter. See also th
e latest Release Notes for the Barracuda WSA for Windows or the Release Notes for the Barracuda WSA for Macintosh. After
installation, see How to Configure the Barracuda WSA With the Barracuda Web Filter to configure the Barracuda WSA from the
Barracuda Web Filter web interface.
Operating Systems Supported
Windows XP SP3 32 bit & 64 bit
Windows Vista 32 bit & 64 bit
Windows 7 32 bit & 64 bit
Windows 8 32 bit & 64 bit
OS X 10.7 and 10.8 (for the iWSA)
Related Articles
Barracuda Web Security Agent How it Works
How to Configure the Barracuda
WSA
Configuration Tool for Barracuda
WSA Windows Client
Configuring Preferences for
Barracuda WSA Macintosh Client
Notes on Installing and Configuring the Barracuda Web Security Agent (WSA)
The methods for installing the Barracuda WSA include:
Installation Using a Windows GPO From the Windows Interface - push the Barracuda WSA to a group of remote computers using a
Windows tool to create a template for the GPO.
Installation Using a Windows GPO From the Command Line - push the Barracuda WSA to a group of remote computers from a batch
(.bat) file on the server.
Manual local Installation from the Command Line
Installing the Barracuda WSA on a Macintosh - using the Macintosh installation program.
Behavior in the Microsoft Small Business Server (SBS) 2008 breaks the server-client trust relationship when using GPO
deployment. The client has to be rejoined to the server, manually. See GPO Installation of the Barracuda WSA With Microsoft SBS
2008 Server for instructions.
To uninstall, see Uninstalling the Barracuda Web Security Agent for Win2K8 Server or Uninstalling the Barracuda Web Security Agent for Win2K3
Server, depending on your Windows server version.
You can download the installation files for MS Windows or the Macintosh from the ADVANCED > Remote Filtering page in the Barracuda Web
Filter Web interface.
System Requirements for Windows
You can install Barracuda WSA on Windows systems that meet the following requirements:
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Latest released Service Packs of
32-bit version of Windows XP
32-bit or 64-bit versions of
Windows Vista
Windows Server 2003
Windows Server 2008
Windows 7
Windows 8
Microsoft Small Business Server (SBS) 2008 - see GPO Installation of the Barracuda WSA With Microsoft SBS 2008
Server
Windows Internet Explorer version 6 or later, or Mozilla Firefox version 3 or later
System Requirements for Macintosh
You can install the Barracuda WSA on Macintosh systems that meet the following requirements:
Version 10.5 (Leopard) or later operating system
50MB memory (10.5 requires 512MB, 10.6 requires 1.0GB)
3.5 GB RAM
Intel or Power PC G4 or G5 processor
30 MB free disk space
Prerequisites for Installation or Upgrade
Consider the following prerequisites before installing the Barracuda WSA on one or more remote computers:
The client PC must have Windows installed on the C:\ drive for successful installation of the Barracuda WSA. The Barracuda WSA will
not install successfully when Windows is installed on the D:\ drive.
The remote user must have an LDAP record in the domain.
Because the Barracuda Web Filter will listen on port 8280 (by default) for Barracuda WSA requests, you must make this port be available
for incoming and outgoing traffic to the Barraucuda Web Filter. The Barracuda WSA cannot forward traffic properly if personal firewalls or
other devices block non-standard ports. Create a port forward on your network firewall on port 8280 to the external IP address of your
Barracuda Web Filter (as specified in the External Hostname/IP Address field on the ADVANCED > Remote Filtering page).
The Barracuda WSA operates on network traffic at a low level within the operating systems, so some anti-virus applications may flag the
Barracuda WSA as suspicious during installation or operation. Ensure that your anti-virus client does not block or has an exception for
any Barracuda WSA files that the anti-virus client flags as suspicious.
You must have Microsoft .NET framework installed before you install the Barracuda WSA using the MSI installation method. The MSI file
does not install the.NET framework for you. If you do not install the .NET framework before you begin installation with the .MSI file, a
message appears prompting you to download and install the .NET framework and then install the Barracuda WSA.
The Barracuda WSA is now localized for the following languages:
German
Japanese
Dutch
Chinese
Chinese Traditional
Portuguese
Spanish
Password Protection and User Privileges
During installation, you have an option to specify a password to protect configuration options and control user privileges. If you specify a password
during installation, that password is required for any user to:
Change configuration settings
Temporarily disable the Barracuda WSA (to allow a user to connect to a public network, such as at a captive portal in a hotel or coffee
shop, before the Barracuda WSA starts again automatically after two minutes)
Stop or start the Barracuda WSA service
Uninstall Barracuda WSA on the client
There is no password reset; if the password is lost, the administrator must reinstall the Barracuda WSA.
Allow Uninstall Option
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You can choose the Allow Uninstall Through Add/Remove Programs option during installation to allow the user to remove the Barracuda WSA
from a computer using the Microsoft Windows Add or Remove Programs window. Use the password protection feature to ensure that
unauthorized users cannot uninstall the Barracuda WSA. Note that the Barracuda WSA does not, by default, appear in the Windows Add or
Remove Programs list.
Stop/Start Service Option
You can choose an option during installation that lets users stop and start the Barracuda WSA from the task tray. This is sometimes helpful with
troubleshooting network or performance issues, or when the user needs to connect with their VPN (see below). You can use the password
protection feature to ensure that only authorized users can stop or start the Barracuda WSA.
VPN Interoperability
The Barracuda WSA will forward all web traffic to the Barracuda Web Filter, so virtual private network (VPN) clients that rely on web browser
settings to forward traffic to private networks may interfere with the Barracuda WSA’s operation.
In order to use a VPN client on a PC that is running the Barracuda WSA, the end user may either have to:
Stop the Barracuda WSA when connecting with the VPN,
Use the VPN in split tunnel mode, or
Have the Barracuda Web Filter enter bypasses for the VPN server IP address in the Bypass Filter text box on the ADVANCED > Remote
Filtering page of the Barracuda Web Filter web interface. You can also specify bypass exception network addresses in the Bypass field
during manual local installation or by using the BYPASS option in a GPO installation.
If you install and configure the Barracuda WSA so that end users may not stop and restart it, then only bypasses or split tunnel mode will work
simultaneously with the Barracuda WSA. You can use the password protection feature, available during installation, to ensure that only authorized
users can stop or start the Barracuda WSA.
Automatic Software Updates
The Barracuda WSA periodically checks the Barracuda Web Filter for available software updates. When an upgrade is available, the Barracuda
WSA automatically and silently downloads and installs it, preserving any configuration information you have in place. The automatic updater
works whether the Barracuda WSA is installed in regular mode or silent operating mode. Automatic updates may be disabled at installation for
those network environments that prefer to manage upgrade deployments manually.
GPO Installation of Barracuda WSA from the Windows Interface
en
This article covers installation using a Windows GPO from the Windows interface on
Win2K8 server and Win2k3 server.
Note that behavior in the Microsoft Small Business Server (SBS) 2008
breaks the server-client trust relationship when using GPO deployment. The
client has to be rejoined to the server, manually. See GPO Installation of the
Barracuda WSA With Microsoft SBS 2008 Server for instructions.
Related Articles
Uninstalling the WSA - Win2K8
Server
Uninstalling the WSA - Win2K3
Server
Install the Barracuda WSA application on Win2K8 Server
Step 1: Download the MSI Windows Installer Package and create an MST file
1. Log on to the server computer as an administrator.
2. Create a shared folder on the network where you will put the installer package (.msi file) that you want to distribute. Clients to which you
want to push the Barracuda WSA must have access to this shared folder.
3. Log in to the Barracuda Web Filter Web interface with the administrator credentials. Navigate to the ADVANCED > Remote Filtering pag
e.
4. Click on the Download/Install link to download the Barracuda WSA MSI installer from the Download Web Security Agent section of the
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4.
page.
5. Save the MSI installer file in the shared folder on the network.
6. Download the open source ORCA tool, a Windows installer package editor which you can use to create a Windows transform file (.mst
file). You can download the ORCA tool from: http://www.softpedia.com/progDownload/Orca-Download-79861.html
7. Launch the ORCA tool after download. Click on File -> Open in the dialog window. Select the installer package BarracudaWSASetupshar
ed folder from the shared folder. Click on Open. Once all the database tables are loaded, select New Transform from the Transform
menu item. Select the Property table from the left list. Scroll to the bottom of the table, right click and select “Add Row”. Add the following
Properties with corresponding values to specify the use of Barracuda Web Filter as a service.
Property:SERVICE_MODEValue:2
Property:USER_MODEValue:0
Property:SERVICE_URLValue:<Barracuda Web Filter IP Address>
Property:SERVICE_PORTValue:8280
8. After adding all the properties, select “Generate Transform” from the Transform menu item. Save this .mst file in the same shared folder
which contains the .msi file. Close the ORCA tool window.
Step 2: Deploy the Barracuda WSA through the Active Directory by creating a GPO
1. Create a Container or Organizational Unit. Open the Active Directory Users and Computers window. In the console tree, right-click your
domain, and then select New -> Organizational Unit. Provide a name for the container and uncheck the checkbox “Protect container from
accidental deletion” so as to be able to delete this container later. If checkbox is marked, it is not possible to delete this container.
In the same Active Directory Users and Computers window, to the Container, add the users and machines for which the policy needs to
be applied. OR you can move the users from the USERS account to the container and machine accounts from COMPUTERS account to
the container. Moving the users or machines prompts a warning. New domain users and computers can be created in this container.
2. Create a GPO. Click Start, point to Administrative Tools, and then click Group Policy Management. Expand the tree for your domain,
select the newly created Container or OU, right-click and select the item “Create a GPO in this domain, and Link it here…”. Provide a
name for the GPO and click the OK button to close the window. This GPO will be added to your container and also to the Group Policy
Objects list.
3. Now, select this GPO which is present in your container and right-click. Click on Edit to open the Group Policy Management Editor. If you
assign this application to a user, it is installed when the user logs on to the computer. If you assign this application to a computer, it is
installed when the computer starts.
To assign an application to a computer:
1. In the Group Policy Management Editor, expand “Computer Configuration”, then expand “Policies” and “Software Settings”. Select
“Software Installation”, right-click and select New -> Package…
2. In the open dialog box, make sure to type the full Universal Naming Convention (UNC) path of the shared installer package that you
want. For example:
\\QAWIN2K8DC\msi files\BarracudaWSASetup.msi
3. Click Open. Select the Deployment Method as Advanced and click OK. In the Barracuda Web Security Agent Properties window, Click on
the Modifications tab and click the Add button. In the Open dialog box, type the full Universal Naming Convention (UNC) path of the .mst
Transform file. For example, \\QAWIN2K8DC\msi files\mysetup.mst and click Open.
4. Click the OK button in the Barracuda Web Security Agent Properties window, and close all open windows.
5. From the command-line window, run the command to force an update of group policy:
C:\Users\Administrator>gpupdate /Force
You should see the following output:
Updating Policy...
User Policy update has completed successfully.
Computer Policy update has completed successfully.
To assign an application to a user:
1. Expand “User Configuration”, and then expand “Policies” and “Software Settings”.
2. Select “Software installation”, right-click and select New -> Package. The rest of the setup for User Configuration is similar to the
Computer Configuration as described above, concluding with a forced group policy update.
Step 3: Application Install (both Win2K3 and Win2K8 servers)
1. Start a computer that is joined to the domain for applying the computer-based policy.
2. Log in as the domain user to apply the user-based policy.
3. You should see the Barracuda WSA Monitor icon in the system tray. This indicates that the Barracuda WSA application has been
installed. You can also verify this in Add/Remove Programs from the Windows Control Panel.
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Install the Barracuda WSA application on Win2K3 Server
Step 1: Download the MSI Windows Installer Package and create an MST
1.
2.
3.
4.
5.
6.
7.
8.
Log on to the server computer as an administrator.
Create a shared folder on the network where you will put the installer package (.msi file) that you want to distribute.
Log in to the Barracuda Web Filter interface using the administrator credentials. Navigate to the ADVANCED > Remote Filtering page.
Click on the Download/Install link to download the Barracuda WSA MSI installer from the Download Web Security Agent section of the
page.
Save the MSI Installer file in the shared folder.
Download the open source ORCA tool, a Windows installer package editor which you can use to create a Windows transform file (.mst
file). You can download the ORCA tool from:
http://www.softpedia.com/progDownload/Orca-Download-79861.html.
Launch the ORCA tool after download. Click on File -> Open in the dialog window. Select the installer package BarracudaWSASetupshar
ed folder from the shared folder. Click on Open. Once all the database tables are loaded, select New Transform from the Transform
menu item. Select the Property table from the left list. Scroll to the bottom of the table, right click and select “Add Row”. Add the following
Properties with corresponding values to specify the use of Barracuda Web Filter as a service.
Property:SERVICE_MODE Value:2
Property:USER_MODE Value:0
Property:SERVICE_URL Value:<Barracuda Web Filter IP Address>
Property:SERVICE_PORT Value:8280
After adding all the properties, select “Generate Transform” from the Transform menu item. Save this .mst file in the same shared folder
which contains the .msi file. Close the ORCA tool window.
Step 2: Deploy the Barracuda WSA application through the Active Directory by creating a GPO
1. Create a Container or Organizational Unit. Open the Active Directory Users and Computers window. In the console tree, right-click your
domain, and then select New -> Organizational Unit. Provide a name for the container and Click OK. In the same Active Directory Users
and Computers window, to the Container, add the users and machines for which the policy needs to be applied. OR you can move the
users from the USERS account to the container and machine accounts from COMPUTERS to the container. Moving the users or
machines prompts a warning. New domain users and computers can be created in this container.
2. Create a GPO. Open the Active Directory Users and Computers window, select your domain, right-click and select Properties. In the
Properties window, click on the Group Policy tab. Click on New button. Provide a name for this new Policy object. Close the Properties
window by clicking on Close button.
3. Link this GPO to the new Container. In the same Active Directory Users and Computers window, select the new container, right-click and
choose Properties. In the Properties window, click on the Group Policy tab. Click the Add button. In the window “Add a Group Policy
Object Link”, click the All tab. Select the new GPO and Click OK to close the window. Click on Apply and OK to close the Container
Properties window. If you assign this application to a user, it is installed when the user logs on to the computer. If you assign this
application to a computer, it is installed when the computer starts.
4. Deploy the application.
To assign the application to a computer:
1. Right-click your domain in Active Directory Users and Computers window and select Properties. In the domain Properties window, click
on the Group Policy tab. Select the new GPO and click on the Edit button. This opens the Group Policy Object Editor.
2. Expand “Computer Configuration”, and then “Software Settings”. Select “Software installation”, right-click and select New -> Package…
3. In the Open dialog box, make sure you type the full Universal Naming Convention (UNC) path of the shared installer package that you
want. For example, \\WFDEVDC01\msi files\BarracudaWSASetup.msi Click Open. Select the Deployment Method as Advanced and click
OK.
4. In the Barracuda Web Security Agent Properties window, Click on the Modifications tab and click the Add button. In the Open dialog box,
type the full Universal Naming Convention (UNC) path of the .mst Transform file. For example, \\WFDEVDC01\msi files\mysetup.mst and
click Open. Click the OK button in the Barracuda Web Security Agent Properties window. Close all the open windows.
5. From the command-line window, run the command to force update of group policy.
C:\Documents and Settings\Administrator.WFDEVDC01>gpupdate/Force
Refreshing Policy..
User Policy Refresh has completed.
Computer Policy Refresh has completed.
To check for errors in policy processing, review the event log. Certain user policies are enabled that can only run during login. Certain
computer policies are enabled that can only run during startup.
OK to Reboot? (Y/N)
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If the server computer is rebooted, it installs the Barracuda WSA on the server machine also.
To assign the application to a user:
Expand “User Configuration”, then expand “Policies” and “Software Settings”. Select “Software installation”, right-click and select New ->
Package… The rest of the setup for User Configuration is similar to Computer Configuration as described above, concluding with a forced
group policy update.
Step 3: Application Install (both Win2K3 and Win2K8 servers)
1. Start a computer that is joined to the domain for applying the computer-based policy.
2. Log in as the domain user to apply the user-based policy.
3. You should see the Barracuda WSA Monitor icon in the system tray. This indicates that the Barracuda WSA application has been
installed. You can also verify this in Add/Remove Programs from the Windows Control Panel.
Troubleshooting
A common cause of failure is that the user and/or the user’s computer does not have adequate access to the share location. Verify that
all access and network privileges have been configured appropriately.
Additional error messages may be found in the Event Log on the domain computer.
If the Event Log has no useful information, consider enabling verbose logging and restarting the computer.
Additional information on fixing Group Policy issues can be found on the Microsoft technet: http://technet.microsoft.com/en-us/library/cc7
75423.aspx
GPO Installation of the Barracuda WSA With Microsoft SBS 2008 Server
This article addresses some behaviors specific to Microsoft Small Business Server (SBS) that the administrator needs to know
about when installing the Barracuda Web Security Agent (WSA) using a GPO.
Refer to How to Install the Barracuda WSA With the Barracuda Web Filter for information about installing the Barracuda WSA using a GPO to
push it out to remote clients.
Next, note that using GPO deployment on Microsoft Small Business Server (SBS) 2008 breaks the server-client trust relationship. The client has
to be rejoined to the server, manually.
After completing GPO installation steps, the client computers will have the Barracuda WSA installed after a reboot. But in Active Directory, when
pulling the computer back into the 'SBSComputers' OU, remote access services from the server side are no longer available. The server cannot
connect to the client, even if the client still shows up in the console. The client has to be removed from that folder and has to be rejoined to the DC
in order to re-establish the trust relationship.
Installation using a Windows GPO from the Command Line
en
The Barracuda WSA can be pushed to a group of remote computers using a GPO from the command line with a batch file. The batch file simply
needs to contain one line, indicating the name of the msiexec file that executes the .msi file used to install the application, and any options you
specify per the table below. The .msi installer file is downloadable from the ADVANCED > Remote Filtering page on the Barracuda Web Filter.
Step 1: Download the MSI Windows Installer Package and create an MST file
1. Log on to the server computer as an administrator.
2. Create a shared folder on the network where you will put the installer package (.msi file) that you want to distribute. Clients to which you
want to push the Barracuda WSA in the Windows domain must have access to this shared folder.
3. Log in to the Barracuda Web Filter interface with the administrator credentials. Navigate to the ADVANCED > Remote Filtering page.
4. Click on the Download/Install link to download the Barracuda WSA MSI installer from the Download Web Security Agent section of the
page.
5. Save the MSI installer file in the shared folder on the network.
6. Create a one-line batch file (per the syntax in the example below) and save the file on a network shared folder that is accessible to all
remote computers to which you want to push the Barracuda WSA. Include the options and arguments per the table below.
7. Create a GPO container for all users / machines to which you want to push the application.
8. Create a GPO with the Windows GPO editor.
9. In the GPO editor, select either ‘startup’ or ‘shutdown’ to trigger when the GPO installs the application on the remote machine.
10. Add the batch file (script) you saved in the shared folder. The application should then install silently on the remote machine when the user
either logs in or shuts down the machine.
Example of the command line to put into the batch file:
BarracudaWSASetup.exe /s /v"/lvemo \setup.log /qn ALLOW_REMOVE=1
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EXCEPTIONS=chrome.exe|safari.exe APPLICATIONS=explorer.exe|firefox.exe
BYPASS=11.11.11.0;*.myWebfilter.com;192.168.* PASSWORD=pass"
This example also writes a log file to the setup directory called setup.log.
Command Line Arguments and Options
Use the following arguments and options to control the configuration of Barracuda WSA.
Arguments:
s runs Setup.exe in silent mode (no dialog boxes).
v passes the /qn (no UI) parameter to the installer, which runs the executable in silent mode.
The following table describes additional options:
Option
Description
ALLOW_REMOVE
1 indicates that users are allowed to remove
the Barracuda WSA.
0 indicates that users are NOT allowed to
remove the Barracuda WSA.
EXCEPTIONS
If there are specific applications from which
you don’t want to capture any traffic, type
them in as a pipe-delimited list.
APPLICATIONS
Type a pipe-delimited list of applications that
will forward all ports to the Barracuda Web
Filter.
BLOCKS
Type a pipe-delimited list of applications to
block. Example:
BLOCKS=block1.exe | block2.exe
BYPASS
Type a semi-colon-delimited list of network
addresses that you want to bypass the
Barracuda Web Filter, such as trusted
internal networks. Guidelines:
Use a * in any octet (except the first) to
indicate “any”.
Bypass entries that begin with a dot (.) will
include any URL that matches the dot and
subsequent string(s). For example, if you use
*.example.com as a bypass entry, any URL
that ends with .example.com will bypass the
proxy.
URL names that begin with a string (and not
a dot) must match the string exactly.
PASSWORD
Type the password users must know to
configure, stop or start the Barracuda WSA.
USER_MODE
0 indicates ordinary operation.
1 indicates silent operation.
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SERVICE _URL
Type the IP address or hostname of the
Barracuda Web Filter, followed by
SERVICE_PORT and the port number.
SERVICE_PORT
Type the port number of the Barracuda Web
Filter, which is
8280 by default. This parameter follows the
SERVICE_URL.
Example: SERVICE_URL=myWebFilter.com
SERVICE_PORT=8280
SERVICE_MODE
2 indicates that you are using the Barracuda
Web Filter.
Example: SERVICE_MODE=2
DISABLE_AUTOMATIC_UPDATES
1 indicates that updates are DISABLED.
0 indicates that updates are ENABLED.
DEFAULT_BEHAVIOR
1 indicates that all application traffic is
forwarded to ports 80 and 443 by default.
2 indicates that no application traffic is
forwarded by default and you specify only the
applications to filter.
3 indicates all applications are blocked by
default and only applications you specify for
filtering are forwarded.
PROXY_EXCEPTIONS
Type a semi-colon-delimited list of network
addresses to specify proxy exceptions for
internal proxies that should be reachable by
Barracuda WSA clients for internal proxying
and filtering. Guidelines:
Use a * in any octet (except the first) to
indicate “any”. Entries that begin with a dot
(.) will include any URL that matches the dot
and subsequent string(s). For example, if you
use *.example.com as a proxy exception
entry, any URL that ends with .example.com
will bypass the proxy. URL names that begin
with a string (and not a dot) must match the
string exactly.
Installing the Barracuda WSA on a Macintosh
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Macintosh System Requirements for the Barracuda Web Security Agent
You can install the Barracuda WSA on Macintosh systems that meet the following requirements:
Version 10.5 (Leopard) or later operating system
50MB memory (10.5 requires 512MB, 10.6 requires 1.0GB)
3.5 GB RAM
Intel or Power PC G4 or G5 processor
30 MB free disk space
Installation
Navigate to the ADVANCED > Remote Filtering page of the Barracuda Web Filter web interface. In the Download Web Security Agent section
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of the page, click the Download/Install link for the Macintosh OS-X. Launch the installer on the Macintosh and follow on-screen instructions.
To Uninstall the Barracuda Web Security Agent
You can uninstall the iWSA for Macintosh in one of these three ways:
1. You can mount the Barracuda WSA installer image from the original disk or disk image file (.dmg) and choose Uninstall.
2. If you used the default install, you can launch the uninstaller from /Library/Application/Support/Barracuda WSA.
3. Running as root from the command line, you can navigate into the Uninstaller.app and invoke the uninstall.sh script directly (located in
/Library/Application Support/Barracuda WSA/Uninstaller.app).
Manual local Installation from the Command Line
en
Local installation from the command line on the remote PC follows the same procedure as Installation using a Windows GPO form the Command
Line without using a GPO. You can simply execute a one line command with options and arguments as shown below to immediately install the
Barracuda WSA on the remote computer. Use the following command to install on a Windows PC or laptop:
BarracudaWSASetup.exe /s /v" /qb SERVICE_MODE=2 SERVICE_URL=10.1.0.51
SERVICE_PORT=8280 WD=1
Arguments and Options
Use the following arguments and options to control the configuration of the Barracuda WSA.
Arguments:
s runs Setup.exe in silent mode (no dialog boxes).
v passes the /qn (no UI) parameter to the installer, which runs the executable in silent mode.
You can set the USER_MODE switch to 1 for silent operation (the end user will not see the Barracuda WSA icon in the System Tray or Start
Menu).
The following table describes additional options:
Option
Description
ADS
1 indicates that users are allowed to disable the Barracuda Web
Filter.
0 indicates that users are NOT allowed to disable the Barracuda Web
Filter.
ALLOW_REMOVE
1 indicates that users are allowed to remove the Barracuda WSA.
0 indicates that users are NOT allowed to remove the Barracuda
WSA.
ALLOW_UPDATE
1 allows seamless updates to the Barracuda WSA. The Check for
Update menu option does not appear in the Configuration Tool
(default).
0 disables seamless updates. The Check for Update menu option
appears in the Configuration Tool.
APPLICATIONS
Type a pipe-delimited list of applications to be filtered on all ports to
the Barracuda Web Filter.
Example:
APPLICATIONS= iexplore.exe|firefox.exe
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AUTH_KEY
If you are configuring the Barracuda WSA to connect to the
Barracuda Web Security Service, you must provide an AUTH_KEY d
uring the installation which connects the Barracuda WSA agent to
your account. You can obtain or generate the AUTH_KEY from the
Barracuda Web Security Service console in the Configuration > Key
Management page. If you are configuring the Barracuda WSA to
connect to a hardware or virtual appliance, do not use an AUTH_KEY
; instead, enter the number "1".
BLOCKS
Type a pipe-delimited list of applications to block. Example:
BLOCKS=block1.exe | block2.exe
BYPASS
Type a semi-colon-delimited list of network addresses that you want
to bypass the Barracuda Web Filter, such as trusted internal
networks. Guidelines:
Use a * in any octet (except the first) to indicate “any”.
Bypass entries that begin with a dot (.) will include any URL that
matches the dot and subsequent string(s). For example, if you use
*.example.com as a bypass entry, any URL that ends with
.example.com will bypass the proxy.
URL names that begin with a string (and not a dot) must match the
string exactly.
DEBUG
1 indicates that the Debug mode is ENABLED.
0 indicates that the Debug mode is DISABLED (default).
DEFAULT_BEHAVIOR
1 indicates that all application traffic is forwarded to ports 80 and 443
by default.
2 indicates that no application traffic is forwarded by default and you
specify only the applications to filter.
3 indicates all applications are blocked by default and only
applications you specify for filtering are forwarded.
DISABLE_AUTOMATIC_UPDATES
1 indicates that updates are DISABLED.
0 indicates that updates are ENABLED.
EXCEPTIONS
If there are specific applications from which you don’t want to capture
any traffic, type them in as a pipe-delimited list.
LANG
Specifies the language that the Barracuda WSA uses on English
operating systems.
German: de-DE
Japanese: ja-JP
Dutch: nl-NL
Chinese: zh-CN
Chinese Traditional: zh-TW
Portuguese: pt-BR
Spanish: es-ES
PASSWORD
Type the password users must know to configure, stop or start the
Barracuda WSA.
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PROXY_EXCEPTIONS
Type a semi-colon-delimited list of network addresses to specify
proxy exceptions for internal proxies that should be reachable by
Barracuda WSA clients for internal proxying and filtering. Guidelines:
Use a * in any octet (except the first) to indicate “any”. Entries that
begin with a dot (.) will include any URL that matches the dot and
subsequent string(s). For example, if you use *.example.com as a
proxy exception entry, any URL that ends with .example.com will
bypass the proxy. URL names that begin with a string (and not a dot)
must match the string exactly.
SERVICE_MODE
2 indicates that you are using the Barracuda Web Filter.
Example: SERVICE_MODE=2
SERVICE_PORT
Type the port number of the Barracuda Web Filter, which is
8280 by default. This parameter follows the SERVICE_URL.
Example: SERVICE_URL=myWebFilter.com SERVICE_PORT=8280
SERVICE _URL
Type the IP address or hostname of the Barracuda Web Filter,
followed by SERVICE_PORT and the port number.
USER_MODE
0 indicates ordinary operation.
1 indicates silent operation.
WD
1 enables the watchdog feature.
0 disables the watchdog feature (default).
Here is another example using various options:
BarracudaWSASetup.exe /s /v"/lvemo \setup.log /qn
AUTH_KEY=11111111111111111111111111111111111111 ALLOW_REMOVE=1
EXCEPTIONS=chrome.exe|safari.exe
APPLICATIONS=explorer.exe|firefox.exe
BYPASS=11.11.11.0;*.purewire.com;192.168.* ADS=1 PASSWORD=pass"
The above example also writes a log file to the setup directory called setup.log.
Uninstalling the Barracuda Web Security Agent for Win2K3 Server
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1. Log on to the server computer as an administrator.
2. Click Start, point to Administrative Tools, and then click Active Directory
Users and Computers. Select your domain, right-click and choose Properties
. Click the Group Policy tab in the domain Properties window. Select the GPO
and click on Edit button. This opens the Group Policy Object Editor.
3. Expand the Configuration based on the assignment of new GPO as follows:
Computer Configuration | Software Settings | Software installation.
User Configuration | Software Settings | Software installation.
4. Select “Software installation” and then select the Software “Barracuda Web
Security Agent” from the right side list. Do a right-click and select All Tasks > R
emove…This prompts for the Removal method option. Choose the option
“Immediately uninstall the software from users and computers” and click OK.
5. Close all the open windows and now run the command to force update of
group policy:
C:\Documents and Settings\Administrator.WFDEVDC01>gpupdate
/Force
Refreshing Policy...
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User Policy Refresh has completed.
Computer Policy Refresh has completed.
To check for errors in policy processing, review the event
log. Certain User policies are enabled that can only run
during logon. Certain Computer policies are enabled that
can only run during startup.
OK to Reboot?. (Y/N)
Rebooting the Server computer uninstalls the Barracuda WSA
application if it is installed.
6. Start the same computer on which the Barracuda WSA application is installed
(computer-based policy).
7. Log in as the domain user to a machine on which Barracuda WSA application
is installed (user-based policy).
8. Look at the system tray - the Barracuda WSA Monitor icon should not be
present. This indicates that Barracuda WSA application has been uninstalled.
You can also verify this in the Add/Remove Programs section of the Control
Panel.
Related Articles
Uninstalling the Barracuda WSA Win2K8 Server
Installation using a Windows GPO Windows Interface
Installation using a Windows GPO Command Line
Uninstalling the Barracuda Web Security Agent for Win2K8 Server
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1. Log on to the server computer as an administrator.
2. Click Start, point to Administrative Tools, and then click Group Policy
Management. Expand the tree for your domain, select the newly created
Container or OU, expand the Container, select the new GPO, right-click and
click Edit…
3. Expand the Configuration based on the assignment of a new GPO as follows:
a. Computer Configuration | Policies | Software Settings | Software
installation.
User Configuration | Policies | Software Settings | Software
installation.
b. Select “Software installation” and then select the Software “Barracuda
Web Security Agent” from the right side list. Do a right-click and select
All Tasks > Remove…This prompts the Removal method option.
Choose the option “Immediately uninstall the software from users and
computers” and click OK.
4. Close all the open windowsj. Run the command to force update of group
policy.
C:\.Users\Administrator>gpupdate /Force
Updating Policy...
User Policy update has completed successfully.
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Computer Policy update has completed successfully.
a. Start the same computer on which Barracuda WSA application is
installed (computer-based policy).
b. Log in as the domain user to a machine on which Barracuda WSA
application is installed (user-based policy).
c. Look at the system tray - the Barracuda WSA Monitor icon should not
be present. This indicates that Barracuda WSA application has been
uninstalled. You can also verify this in the Add/Remove Programs
section of the Control Panel.
Related Articles
Uninstalling the Barracuda WSA for
Win2K3 Server
Installation using a Windows GPO Windows Interface
Installation using a Windows GPO Command Line
How to Configure the Barracuda WSA With the Barracuda Web Filter
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Initial Configuration
Begin initial configuration of your Barracuda WSA installation by doing the following
using the ADVANCED > Remote Filtering page on the Barracuda Web Filter Web
interface:
1. Identify the external IP address of your Barracuda Web Filter in the External
Hostname/IP field so that the Barracuda WSA can direct user web traffic to that IP
address. Note: It is recommended that you enter the hostname of your Barracuda Web
Filter in case the IP address of the appliance changes, which would interrupt service for
your current Barracuda WSA installations in the field. If you do enter the IP address
and must change it at some point, the following procedure is required to ensure
minimal service interruptions:
Related Articles
How to Install the Barracuda WSA
Barracuda WSA - How it Works
Uninstalling the Barracuda WSA for
Win2K8 Server
Uninstalling the Barracuda WSA for
Win2K3 Server
Configuration Tool for Barracuda
WSA Windows Client
Configuring Preferences for
Barracuda WSA Macintosh Client
1a. Create the new IP address forward on your network firewall while the existing/old Barracuda Web Filter IP address is still accessible to
Barracuda WSA installations.
1b. Enter the new IP address in this field so that the Barracuda WSA in the field can be updated with the new IP address of the Barracuda
Web Filter.
1c. Once all of your Barracuda WSA installations are updated with the new IP address, you can expire the old IP address.
2. Identify all of your internal IP addresses and proxies, then entering those in the Bypass Filter and Proxy Exception text boxes. This will
exempt these IP addresses from traffic redirection. If you have a PAC or WPAD driven proxy setup, ensure that the proxy hosts are also listed as
Proxy Exceptions.
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3. Create a port forward on your network firewall on port 8280 to the external IP address of your Barracuda Web Filter ( External Hostname/IP).
4. Read the online help for the ADVANCED > Remote Filtering page on the Barracuda Web Filter web interface for details on the above and
other configuration options.
SSL Inspection and the Barracuda WSA
Available with the Barracuda Web Filter 7.1 and higher
If you want the Barracuda Web Filter to be able to monitor and block web traffic over HTTPS for Facebook applications, YouTube applications,
Gmail and other subapplications that run over HTTPS, you can enable SSL inspection on the Barracuda Web Filter and for remote users running
the Barracuda WSA. To configure the Barracuda Web Filter to use SSL Inspection, see How to Configure SSL Inspection 7.0 and the ADVANCE
D > SSL Inspection page in the Barracuda Web Filter web interface. When you configure SSL Inspection on the Barracuda Web Filter, all traffic
from the Barracuda WSA is also subject to SSL Inspection automatically.
For more about how SSL Inspection works and why it is important, see Using SSL Inspection With the Barracuda Web Filter.
Note that SSL Inspection will not work when Policy Lookup Only Mode is enabled in the ADVANCED > Remote Filtering page on
the Barracuda Web Filter.
Web Connectivity Issues and the Barracuda WSA
Once the Barracuda WSA is deployed for end users, the administrator can do any of the following to address any web connectivity issues users
might have when using the Barracuda WSA on their remote laptops and PCs:
Temporarily disable the Barracuda WSA if the user is experiencing any problems when they are logging into the network from a hotel or
other captive portal. Check to see if the Captive Portal feature is enabled on the BLOCK/ACCEPT > Configuration page of your
Barracuda Web Filter.
Stop the Barracuda WSA service on the user’s laptop or PC. Uninstall the Barracuda WSA from the users’s laptop or PC. See related
article on uninstalling the agent.
Release Notes - Barracuda Web Security Agent for Macintosh
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What's New in Version 1.4.0
Running version 1.4.0 of the Barracuda Web Security Agent (iWSA) requires MacOS X 10.6 (Snow Leopard) or later.
Host Fallback feature - The Barracuda WSA checks the current response times of all Barracuda Web Security Service hosts and ranks
them accordingly. Rankings are viewable by the admin, and the admin can choose to have the Barracuda WSA automatically switch
hosts to the fastest or to set the service host manually. See Fallback Service Hosts and the Barracuda Web Security Service for details.
NOTE: This feature is not active by default; you must set it to be active in the profile and sync with clients.
Improved compatibility with IPv6 services.
Fixed in Version 1.4.0
Works as expected with AirDrop file sharing tool on MacOSx.
Barracuda Web Security Agent installer works as expected.
Reduced administrative traffic between the client and service host.
Increased security in proxy process.
What's New in Version 1.3.1
Added support for MacOS X 10.9 Mavericks and the most recent version of Safari browser.
Improved compatibility with Flash networking requests.
Fixed in Version 1.3.1
Temporary server error is no longer treated as a hard network failure.
144
What's New in Version 1.3.0
General Availability: 8/2/13
Added support for secure Barracuda Web Security Service connections over port 8443.
Improved HTTP 1.1 compatibility.
Fixed in Version 1.3.0
The YouTube for Schools feature works in Policy Lookup Only (PLO) mode.
Works with PLO mode when the Barracuda Web Filter is unreachable.
Resolved connection issue after correcting an invalid Barracuda Web Security Service auth key.
IPv6 requests do not trigger fail open.
What's New in Version 1.2.2
General Availability: 07/06/12
The Barracuda Web Security Agent for Mac now passes along applicable LDAP credentials in the request headers.
Fixed in Version 1.2.2
Improved logging for administrative requests and resolved startup problems which occurred on some systems.
Release Notes - Barracuda Web Security Agent for Windows
en
en
What's New in Version 4.3.0
Host Fallback feature - The Barracuda WSA checks the current response times of all Barracuda Web Security Service hosts and ranks
them accordingly. Rankings are viewable by the admin, and the admin can choose to have the Barracuda WSA automatically switch
hosts to the fastest or to set the service host manually. See Fallback Service Hosts and the Barracuda Web Security Service for details.
Fixed in Version 4.3.0
Removed default forced restart after installation complete, which could cause issues when installing via Windows GPO. [BNWSA-258]
Improvements in filtering on Windows 8 / 8.1 systems using WFP. [BNWSA-222]
Updated LSP component to address Windows .Net 4.5 incompatibility issues with Non-IFSLSPs. [BNWSA-169]
Warn page can now also be shown for local redirect address set to external Barracuda Web Filter IP address. [BNWSA-108]
For SSL Traffic, fixed handling of TLS 2.1 to improve HTTPS Filtering.
Fixed issues occurring in Policy Lookup Mode (Barracuda Webfilter), where monitored pages are not displayed correctly [BNWSA-257]
The WSATraffic.log and WSA.log files are now limited to a maximum size of 3 MB each.
When the Barracuda WSA client is uninstalled, all related log files are removed from the system. [BNWSA-34]
Version 4.3.0.26
This version replaces version 4.3.0.24
Fixed: If Fail Open is disabled, the Barracuda Web Security Agent now only fails closed when there is no good connection available to
the service host. [BNWSA-472]
Fixed: The default setting on the Barracuda Web Security Agent client Fail Open mode is no longer disabled; the default is now that Fail
Open is enabled before initial successful sync with the host service. This ensures that traffic between the client and the Internet
continues to flow even if no connection to the Barracuda Web Security Service or the Barracuda Web Filter can be made.
Version 4.3.0.24
If the Fallback feature is enabled (see Fallback Service Hosts and the Barracuda Web Security Service), the Barracuda WSA no longer
fails open/closed if the first fallback host is not available; rather, the next available fallback host is automatically selected. [BNWSA-465]
What's New in Version 4.2.5.0
145
The Update options have been re-enabled (backend):
This relates to Auto-Update and Allow Users to Check for Updates Options, configurable on the Remote Filtering tab of the
Barracuda Web Filter.
The Barracuda Web Security Service only has Allow updates, which has the same effect as Auto-Update on the Barracuda
Web Filter. It does not include the second configuration option on the Remote Filtering tab. Therefore, for the Barracuda Web
Security Service, the Check for Updates option in the Context Menu is not available by default.
Update server: d.barracuda.com. If the Update option is enabled, make sure that access to this server is available through your
firewall.
Sync settings now available from the Context Menu:
Any user can trigger the config synchronization with Service (Barracuda Web Filter / Barracuda Web Security Service) at any
point of time.
Before this version, this option was only available to users having access to the Local Configuration Tool or synchronization on
specific events like logon/startup.
The Admin can now configure the Temporarily Disable option using command line / GPO deployment option:
Default:
a. After 5 minutes, any temporarily disabled Barracuda WSA client will be re-enabled and proxy web traffic to the Barracuda Web
Filter / Barracuda Web Security Service.
b. The user can disable the client 3 times and must restart the client machine in order to reset this count.
Configurable via command line / GPO on installation time:
a. TDT (in ms): The length of time (timeout) the client will be disabled
b. TDC: The number of times that the user can temporarily disable the client before needing to reboot the machine
c. Example for cmd line config / GPO for custom timeout = 30 mins, timeout count = 5 (=> disable for 30 mins; you can do this 5
times before need to reboot the machine):
BarracudaWSASetup.exe /s /v" /qn AUTH_KEY=[YOUR_AUTHKEY] SERVICE_URL=[YOUR_SERVICE_URL]
ALLOW_REMOVE=1 TDT=1800000 TDC=5
The CPU monitor is now by default enabled for Barracuda Web Security Service users and disabled for Barracuda Web Filter users. This
configuration can now be only overridden at the time of installation, using command line / GPO deployment:
Enabled: CPU=1
Disabled: CPU=0
Example for cmd line config / GPO for disabling CPU monitor for BWFS:
BarracudaWSASetup.exe /s /v" /qn AUTH_KEY=[YOUR_AUTHKEY] SERVICE_URL=[YOUR_SERVICE_URL]
ALLOW_REMOVE=1 CPU=0
What's New in Version 4.2.4.47
Scheduled reboot after installation to ensure that the Barracuda Web Security Agent (WSA) is running.
CPU monitor for BarracudaWSA.exe to address intermittent high CPU Loads with cloud-based web content filtering.
Fixed in Version 4.2.4.47
Barracuda WSA components no longer flagged as viruses by MS Windows antivirus scanners
Fixed in previous versions:
The Barracuda WSA tests for Barracuda Web Filter and Barracuda Web Security Service availability on each tap of the Start Service opt
ion in the tooltip menu.
Resolved issues when already in 'Fail Open' mode
Timeout for service availability check was shortened from 60s to 30s.
Barracuda Web Security Agent - How it Works 6.x
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Filter Traffic From Remote Windows and Macintosh Laptops and Desktops
To take advantage of Remote Filtering, the Barracuda Web Security Agent (WSA) is
deployed on each remote desktop or laptop and proxies all web traffic over the Internet
to a specified Barracuda Web Filter, which has been configured to recognize each
remote client by traffic signed by the Barracuda WSA.
146
You can download the files required to install the Barracuda WSA for Windows or
Macintosh and configure how it filters traffic for your remote users via the ADVANCED
> Remote Filtering page in the Barracuda Web Filter web interface.
Related Articles
How to Install the Barracuda WSA
How to Configure the Barracuda
WSA With the Barracuda Web
Filter
The Barracuda WSA works with LDAP authenticated users.
Figure 1: The Barracuda WSA proxies remote users’ web traffic to the Barracuda Web Filter.
When remote users browse the web, all filtering policies configured on the Barracuda Web Filter associated with their Barracuda WSA are applied
to their browsing sessions. The Barracuda WSA intercepts all HTTP/S and FTP traffic through any connection on the remote computer without
regard to the type of web browser. This includes Ethernet, wireless, or dial-up connections. The Barracuda WSA works with the Barracuda Web
Filter to prevent malware from reaching remote computers, and only safe traffic is passed down to their web browsers.
147
Exceptions to Filtering with the Barracuda WSA
From the ADVANCED > Remote Filtering page, you can specify domains or subnets that should bypass filtering by the Barracuda Web Filter as
well as any existing proxies on the client’s LAN for which traffic should bypass filtering.
Begin initial configuration of your Barracuda WSA installation by identifying all of your internal IP addresses and proxies, then entering those in
the Bypass Filter and Proxy Exception text boxes on the ADVANCED > Remote Filtering page. This will exempt these IP addresses from traffic
redirection. If you have a PAC or WPAD driven proxy setup, ensure that the proxy hosts are also listed as Proxy Exceptions. Also make sure to
identify the external IP address of your Barracuda Web Filter in the External Hostname/IP field so that the Barracuda WSA can direct user web
traffic to that IP address.
Policy Lookup-Only Mode
In this mode, the Barracuda WSA on the remote user's machine looks up policies configured on the Barracuda Web Filter for that user/client,
applies the policies, then routes allowed web traffic from the user's machine via its usual path to the Internet. Traffic is not routed through the
Barracuda Web Filter.
The advantage of using Policy Lookup Only mode is that it saves corporate bandwidth and reduces traffic through your Barracuda Web Filter. The
disadvantage is that, since the remote client’s traffic does not pass through the Barracuda Web Filter, virus and malware scanning is not applied
to this traffic. This is an important consideration when deciding whether or not to enable Policy Lookup Only mode.
To enable this mode, simply set Policy Lookup Only Mode to Yes on the ADVANCED > Remote Filtering page of the Barracuda Web Filter
web interface.
Application Filtering with the Barracuda WSA
The Barracuda WSA automatically forwards web browser traffic on all ports, and forwards traffic from all other applications on ports 80 and 443.
On the ADVANCED > Remote Filtering page you can specify how the Barracuda WSA filters application traffic by default (Default Filter
Settings):
Filter ports 80 and 443 for all applications,
Filter specified applications and allow all others, or
Filter specified applications and block all others.
If you have specific applications that use other ports, you can add them to the Applications to Filter (All Ports) list on the ADVANCED > Remote
Filtering page. You can also list specific applications to always block, or specific applications to filter.
The Barracuda Web Filter Vx virtual appliance does not support application blocking.
Barracuda Safe Browser Setup Guide - With Barracuda Web Filter
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In this article:
Basic Setup on the Barracuda Web Filter
Basic Setup of the iOS Mobile Device
Managing the Application in iOS
Advanced Setup
Related Articles
Barracuda Safe Browser - FAQ
Barracuda Safe Browser User
Guide
Filtering Traffic for Offsite and
Mobile Users
148
If you have a Barracuda Web Filter running version 6.0.1 or higher, you can deploy and use the Barracuda Safe Browser on mobile
devices running on and off of the network.The Barracuda Safe Browser supports iOS 4.3 and higher.
You can deploy and use the Barracuda Safe Browser on mobile devices in place of the native browser, applying the same security policies as
those applied by the Barracuda Web Filter to other users in the rest of your network. The Barracuda Safe Browser communicates with the
Barracuda Web Filter to provide web security to mobile users, per settings configured on the ADVANCED > Remote Filtering page and per
policies you configure on the BLOCK/ACCEPT pages.
Figure 1: iOS devices with the Barracuda Safe Browser installed are protected by the Barracuda Web Filter
Basic Setup on the Barracuda Web Filter
To configure and install the Barracuda Safe Browser:
1. Log into your Barracuda Web Filter as admin and navigate to the ADVANCED > Remote Filtering page. Under the Remote Filtering
Configuration section, enter the External IP Address/Hostname (the external IP address or hostname of the Barracuda Web Filter that
will handle web traffic proxied from remote iOS devices running the Barracuda Safe Browser), and the Destination Port to which you
want the Barracuda Safe Browser to direct web traffic from mobile devices. You will need to create a port forward rule on your firewall to
this port and the External IP Address/Hostname.
2. On the Safe Browser tab, select an authentication option and other other settings specific to the Barracuda Safe Browser from the Safe
Browser tab on the bottom portion of the page. Click on Help for additional information about the available settings.
Basic Setup of the iOS Mobile Device
1. From within your Wi-Fi network, launch the Safari browser on your iOS device and visit the Apps Store to fetch the Barracuda Safe
Browser application.
2. Select the application for iPad or the iPhone and touch Install. Enter your Apple ID Password if prompted.
When the application has downloaded, you'll see the Barracuda Safe Browser icon on the display. There are two options for the intial
launch and provisioning of the Barracuda Safe Browser:
a. The administrator can send an email to the email address configured on the device with a link to provision the Barracuda Safe
Browser. The link format is: bsb://provision?mode=appliance&wanip=xx.xx.xx.xx:xxxx , where xx.xx.xx.xx:xxxx represents the
External IP Address/Hostname of your Barracuda Web Filter and :xxxx represents the Destination Port as entered on the AD
VANCED > Remote Filtering page. Then the user can simply open the email message on the mobile device and touch the link
in the email. The Barracuda Safe Browser will automatically be provisioned and will launch.
b. If the administrator has not sent the email, then under the orange Provision button, select the Web Filter option, then Done.
In the Host textbox, the enter the IP address and port that was entered by the administrator on the Barracuda Web Filter ADVAN
CED > Remote Filtering page as mentioned above. Use the format per this example: 111.222.333.444:8280
3. If the Session Authentication field on the ADVANCED > Remote Filtering page is set to Forced Authentication, the user will be
prompted to provide LDAP credentials to log in. Alternatively one can tap the Continue as Guest button. Note: If you want to use the
device with a different Barracuda Web Filter account, you must unprovision the device. When you connect to the other account, the
device will be re-provisioned.
4. To enable the BASIC > Remote Devices page to report the physical location of the mobile device, touch OK when prompted to 'Use
Your Current Location".
5. Enable Restrictions for the Safari browser locally on the device through Settings > Restrictions, or using an MDM or Apple
Configurator.
6. Once the local browser is restricted, the icon for that browser will disappear from the UI on the mobile device, and the user is ready to run
Barracuda Safe Browser with policies you've configured in Barracuda Web Filter. Your Barracuda Web Filter policy will now be applied to
all traffic from the Barracuda Safe Browser and will be reflected in reports.
Managing the Application in iOS
View Bookmarks: From the Bookmarks button at the bottom of the iOS display, you can view bookmarks provisioned to the device by
Barracuda Web Filter as well as the bookmarks added by the user.
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Log Out, Unprovision and Clear History: From the Settings button at the bottom of the iOS display you can view the Username, Hostname,
Auth Key, Device ID and Version. If you need to log out the current user if the device will be shared, you can Log Out, Unprovision the device
and Clear History. When the next user runs the Barracuda Safe Browser, the device will be re-provisioned and the user will be prompted to log in
per the configuration by Barracuda Web Filter.
Advanced Setup
1. On the ADVANCED > Remote Filtering page, in the WSA / Safe Browser Configuration section, configure the following settings on
the Safe Browser tab:
Session Authentication: If you want to require users to log in with LDAP credentials before browsing, select Forced Authentication. Sele
cting Optional Authentication will give the user the choice of either logging in and browsing with assigned polices, or browsing as a guest
under a different set of policies. Select None if you don’t want the user to be presented with a log in option – the user will only browse as
a guest.
Note: If you configure LDAP authentication in Barracuda Web Filter for your Barracuda Safe Browser users, you can apply user-specific
policies for each mobile user. Otherwise you can only apply global policies to all mobile users. To configure LDAP authentication, you'll
need to expose your LDAP server to the Internet by port forwarding from your Barracuda Web Filter external IP address to port 389
(non-secure) or port 636 (secure) for your LDAP server. Currently Barracuda Web Filter supports Microsoft Active Directory.
Session Timeout: If you have configured LDAP authentication for your mobile users, use this setting to specify the amount of time, in
minutes, that is allowed to elapse before a user's login expires and re-authentication is required. To disable session expiration (so that a
session does not expire until the user logs off), set this value to 0 hours or minutes. The recommended setting is 24 hours.
Idle Timeout - If you have configured LDAP authentication for your mobile users, use this setting to specify the amount of time, in
minutes, that a user's session is allowed to remain idle before that login session automatically expires. To disable session expiration
based on idle time, set this value to 0 hours or minutes. The recommended setting is 8 hours.
Password: Creating a password means that the user (or the administrator of the mobile device) can enter it to bypass all filtering by
pressing the Bypass action button on their mobile device.
Bypass Filter: Enter any IP addresses that you want to bypass filtering by Barracuda Web Filter.
Fail Open: Set to Yes if you want the Barracuda Safe Browser to allow all web requests if the mobile device cannot reach Barracuda
Web Filter for some reason. Setting to No means that all requests would be blocked in that case.
Enable Geolocation: Setting to Yes means that the last location from which the user of the device logged in, or that the settings were
synchronized, will be displayed in Barracuda Web Filter. If this feature is enabled, then on the Remote Filtering > Safe Browser > Last
Seen Devices page, you'll see the username, the domain, the Device ID, the IP address, the last-seen location and time/date that the
user last made a web request. This feature is useful for locating lost or stolen devices.
Allow Temporary Bypass Filtering: Enabling this feature allows the administrator or user to temporarily bypass filtering by Barracuda
Web Filter for up to 5 minutes, at which point filtering automatically resumes. If the user is connecting from an Internet cafe or hotel
portal, for example, and needs to temporarily disable the Barracuda Safe Browser so that they can connect to their network, they can do
so for the 5 minute period. Only 3 temporary disables are allowed once the Barracuda Safe Browser is installed. The Password,
configured per above, is not required.
Allow Bypass Filtering: Users who have administrative rights on their mobile devices will be able to bypass filtering indefinitely in their
Barracuda Safe Browser. The Password, configured per above, is required.
How to Enforce Proxy Settings On a Chromebook Using Google Apps
This article addresses filtering web traffic for Chromebook users running Google Apps for Education / Business outside the
school/business network.
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1. Navigate to Device Management > Chrome > User Settings.
2. At the bottom of the page in the Network section, in the Proxy Settings box, specify either the proxy server, which would be the
Barracuda Web Filter IP address, or PAC file details, to configure the connection properties.
Once the settings are saved, they are synchronized to the Chromebook device.
Figure 1. Configuring proxy settings in Google Apps
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Proxy Settings on the Barracuda Web Filter
If Chromebooks traffic is to be filtered both inside and outside the network, the Barracuda Web Filter must be accessible from both inside and
outside the network. When using the static proxy setting, you specify a single host that must be accessible by the name specified both internally
and externally. As shown in the example in Figure 1 above, the administrator would need to ensure that mywebfilter.com resolves in both
internal and external DNS to the proper IP address.
To edit the proxy settings on the Barracuda Web Filter:
1. Go to the BASIC > IP Configuration page and make sure that Enable Proxy on WAN is set to Yes.
2. On the ADVANCED > Proxy page, make sure that the Proxy Port you specify (set to 3128 by default) can be accessed both internally
and externally.
Using SSL Inspection
If you will be using the SSL Inspection feature of the Barracuda Web Filter to inspect HTTPS traffic, Barracuda recommends using the Google
Apps for Business/Education Management console to push out the certificate for SSL inspection to Chromebook devices. This prevents the
certificate from being marked as “Untrusted” in the Chrome device, because when installing the certificate via Google Apps Management, the
certificate is simply marked as “Installed by Administrator”.
How to Push the SSL Certificate to Chromebook Devices
1. Go to the ADVANCED > SSL Inspection page in the Barracuda Web Filter web interface. Click the Download button for Root
Certificate For Browsers to download the certificate file (in .der format) to your local system or network.
2. In Chrome, go to Device Management > Chrome > Network and click the Manage Certificates button. This flow expects a certificate in
.der file format.
3. Select the certificate you saved on your local system or network in step 1.
Advanced Configuration
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For details about configuration of these features, please see the online help in the Barracuda Web Filter web interface.
Enabling and Disabling Virus Protection
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By default, virus scanning is automatically enabled on the Barracuda Web Filter, and the virus definitions are updated on a regular basis (hourly
by default) using Energize Updates.
When virus scanning is enabled, all traffic processed by the Barracuda Web Filter is scanned for viruses and any traffic that contains a virus is
blocked. If you already have anti-virus software protecting your web traffic, you can turn off virus scanning on the Barracuda Web Filter using the
BASIC > Virus Checking page. Otherwise, it is recommended to leave this feature turned on.
Proxy Settings
Use the ADVANCED > Proxy page to configure proxy settings for peer proxies, headers, HTTP and HTTPS ports as well as exceptions to proxy
authentication by source IP address, domain name, header pattern or destination IP address. Note that peer proxy only works with inline
deployments - for details, see Deploying the Barracuda Web Filter with a Peer Proxy.
Web Caching
Web caching on the Barracuda Web Filter can accelerate web page downloads and also reduce traffic on the external network connections. For
these reasons, it is recommended to keep web caching enabled. Use the ADVANCED > Caching page to enable or disable web caching, to clear
the cache or to create exceptions for domains you don’t want the Barracuda Web Filter to cache.
Monitoring the System
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The Barracuda Web Filter incorporates hardware and software fail-safe mechanisms that are indicated via system alerts and logs. The powerful
reporting engine provides a broad spectrum of web traffic statistics and user-level activity reports which can be created ad-hoc, emailed to
administrators or sent to an FTP or SMB server. You can monitor multiple Barracuda Web Filters using Barracuda Cloud Control (BCC), a
centralized management web interface for managing, configuring and reporting on multiple devices from one central web console. These articles
describe the tools and monitoring tasks you can use via the web interface and the front panel of the Barracuda Web Filter to track system
performance and configure system alerts.
In this Section
Basic Monitoring Tools
Reporting 6.x
Reporting 7.x
Report mapping 6.0.1 to 7.x
How to Set Up Alerts and SNMP Monitoring
How to Set Up Barracuda Cloud Control
Troubleshooting
Syslog and the Barracuda Web Filter
Basic Monitoring Tools
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Performance statistics for the Barracuda Web Filter are presented on the BASIC >
Status page for IT administrators to monitor the health of the system and to make sure
traffic is flowing as expected. Web requests by users on the network are tracked and
presented as raw data in the web logs as described below, but that data is also
packaged and presented in an easy-to-read format in the reports module. In general
the reports listed on the BASIC > Reports page should server the needs of both
managers and IT administrators regarding user productivity, bandwidth usage,
infection/malware detection and more. For more about the Barracuda Web Filter
reporting engine, see the Reporting article. For details about configuring and
scheduling reports, see the online help in the BASIC > Reports page.
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Related Articles
Reporting 6.x
Audit Log of Configuration Changes
Barracuda Cloud Control Overview
Syslog and the Barracuda Web
Filter
In this article:
en
Viewing performance statistics
Logs for Web Traffic and Syslog
Web Traffic Log
Application log
Using a Syslog Server to Centrally Monitor System Logs
Warned Activity List
List of Infected Clients
Remote Devices Tracking by Time and Location
Task Manager
Viewing performance statistics
The BASIC > Status page provides an overview of the health and performance of your Barracuda Web Filter, including the following:
Filtering statistics (such as threats blocked by the filtering rules, blocked visits to known spyware websites, blocked downloads of
spyware or viruses) for the past day and hour, as well as total statistics since installation (or last reset) of the Barracuda Web Filter.
Performance statistics, such as CPU temperature, throughput, system load and TCP connections. Statistics displayed in red signify that
the value exceeds the normal threshold.
Protection Status -The current Operating Mode of the Barracuda Web Filter. Operating Mode is configured on the BASIC > IP
Configuration page. Possible modes are:
Active: Traffic is logged and policies are applied.
Audit: In inline mode, traffic is logged only. Policies are not applied. In forward proxy deployment, traffic is logged and policies
are applied, just like they are in Active mode.
Safe: Note that this mode is systematically set if the system load on your Barracuda Web Filter is excessive because either the
maximum number of TCP connections allowed on your model is exceeded, or the reporting engine is processing a large volume
of data. Safe mode cannot be triggered over the web interface and is not applicable if the Barracuda Web Filter is
deployed in WCCP configuration. In Safe mode the device will pass web traffic through without filtering and logging. The
Barracuda Web Filter will send a notification email to the System Alerts Email Address that is specified on the BASIC >
Administration page indicating the reason the device is experiencing a load issue. If the number of current TCP connections
and/or the load on the reporting engine returns to normal range, the Barracuda Web Filter will resume Active mode; otherwise
the device will remain in Safe mode and traffic will not be filtered or logged. At this point it is recommended that you place the
Barracuda Web Filter in Audit mode and troubleshoot the problem. For further assistance, please contact Barracuda Networks
Technical Support.
Throughput gauges the total volume of traffic that is passing through the Barracuda Web Filter and is measured in Mb/s.
TCP Connections indicates number of concurrent TCP connections used by the Barracuda Web Filter to service Internet traffic. TCP
Connection usage can be monitored while in Audit mode as well as in Active mode without affecting production traffic. A single user
typically requires 1 to 1.5 active TCP connections; however, the peak number of TCP connections can significantly increase with heavy
Web browsing or with bandwidth-intensive Internet applications such as voice, instant messaging (IM) or other streaming media
applications.
Cloud Control indicates whether or not this Barracuda Web Filter is connected to the Barracuda Cloud Control (BCC) management tool.
For general information about Barracuda Cloud Control, see Barracuda Cloud Control - Overview. For details about connecting the
Barracuda Web Filter to the BCC, see How to Set Up Barracuda Cloud Control.
System Load represents an estimate of CPU and disk load on the system. It is not unusual for the load to reach 100%, especially when
the incoming queue is large. 100% load for long periods of time indicates trouble in the system, especially if the incoming queue
continues to increase in size. If the System Load exceeds 50% for more than 5 minutes, the Operating Mode will automatically shift to
Safe mode (unless the Barracuda Web Filter is deployed in WCCP configuration) and will pass traffic without filtering or logging until
normal operation can be resumed. See the online help for the BASIC > Status page for more information.
Cache Hit Ratio indicates the percentage of requests handled by the cache.
Subscription status for Energize Updates, Instant Replacement, and Premium Support.
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Lists of infected clients and blocked web requests.
A set of bar graphs that illustrate an hourly breakdown of requests made by your users in the last 24 hours, and a set of bar graphs that
illustrate a daily breakdown of requests made by your users in the last 30 days. Both sets of graphs illustrate the following data:
Number of requests blocked
Number of requests received
Number of kilobytes per second used by the requests allowed
Each bar graph is accompanied by two Top Ten lists: domains represented in the graph and web content categories represented in the
graph.
LAN, WAN and AUX port connection details are associated with icons in the Link Status section, displaying connectivity where applicable
(version 6.0.1 and higher). Hover the mouse over the LAN icon, for example, to see LAN connection details (MAC address, IP address,
throughput). If the AUX port is configured, the icon will be displayed with details for that port in addition to icons for either or both the
WAN and LAN. On the Barracuda Web Filter Vx, only the LAN port icon and details are displayed.
Logs for Web Traffic and Syslog
Web Traffic Log
The BASIC > Web Log page displays a list of system logs for your Barracuda Web Filter. On a regular basis you should view the Web Log page
to monitor the web and spyware traffic (both HTTP and non-HTTP) passing through your Barracuda Web Filter. The page also has a button used
to clear all traffic logs as needed. Use this page to view the following information about each entry in this log:
Date and time the Barracuda Web Filter processed the request.
IP address of the client that originated the request.
IP address of the requested website or application
For search engine requests, the search keyword(s) entered by the user
Type of file contained in the request, as designated by the HTTP header. For a list of common MIME types, see the help page for the
MIME Type Blocking feature.
The user name or group that sent the request.
The action taken by the Barracuda Web Filter (Allowed, Detected, Warned, Monitored, Blocked).
The reason the Barracuda Web Filter performed the action.
Detailed information about the actions.
Number of bytes of data processed for this request.
You can perform the following operations on the Web Log page:
Apply filters to locate specific log entries
Refresh to update the log. The most recent entry is at the top of the list.
Clear the log to purge all the current entries.
Export the displayed entries to a CSV file.
Application log
The BASIC > Application Log page displays the log of web application traffic blocked by the Barracuda Web Filter. Note that the Barracuda Web
Filter Vx virtual machine does not block applications. Use this page to view the following information about each entry in this log:
Date and time the Barracuda Web Filter blocked the request.
IP address of the client that initiated the request.
Name of the application that was blocked.
You can perform the following operations in the Application Log page:
Customize the appearance of the display
Update the contents displayed in this page
Clear the contents of the traffic log itself
Filter the entries displayed
Export the displayed entries to a CSV file
Using a Syslog Server to Centrally Monitor System Logs
Syslog is a standard UNIX/Linux tool for sending remote system logs and is available on all UNIX/Linux systems. The Barracuda Web Filter
provides syslog data for both web traffic and system events. Use the ADVANCED > Syslog page to specify servers to which the Barracuda Web
Filter sends each type of syslog data.
Syslog servers are also available for Windows platforms from a number of free and premium vendors. Barracuda Networks has tested with a
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Windows freeware syslog server from Kiwi Enterprises (www.kiwisyslog.com). Barracuda Networks makes no guarantees that your Barracuda
Web Filter will be completely compatible with this syslog server. Note that syslog support is not available on the Barracuda Web Filter 210.
For details about syslog output from the Barracuda Web Filter, see Syslog and the Barracuda Web Filter.
Warned Activity List
The BASIC > Warned Activity page displays the list of all warned activity that is in effect for the client machines protected by the Barracuda Web
Filter system. Use this page to view the following information about each entry in this log:
Date and time that the warned activity was triggered.
IP address of the client machine that triggered the warned activity.
Username that triggered the warned activity. This field indicates whether the user account is from the local, LDAP or NTLM realm.
The URL that the user was attempting to access when the warned activity triggered.
The domain names that triggered the warned activity.
The Web content category that triggered the warned activity.
You can perform the following operations in the Warned Activity page:
View details about a warned activity
Clear all warned activity
A warned activity remains in effect until it times out (as configured in the BLOCK/ACCEPT > Configuration page) or until it is explicitly removed
by the Administrator (using the BASIC > Warned Activity page). If the user attempts to access the same website after a warned activity times out
or is deleted, the user must click the Proceed button to re-acknowledge the warning and then access the website again.
List of Infected Clients
The BASIC > Infection Activity page displays outbound activity monitored by the Barracuda Web Filter to sites/IP addresses that are known to
be malicious, and displays a list of clients in the network that are infected with a virus or with spyware. Check this page for activity by client
hostname or IP address to determine if further investigation should be performed on the client. The data in the log includes:
Spyware - Names of the threats blocked by the Barracuda Web Filter.
Count - Number of times that the Barracuda Web Filter blocked this threat.
Last Seen - Date and time this threat type was last detected on this client.
Port - The port over which the infection was detected.
You can use this list to determine if any of your clients have been prompted to use the Barracuda Malware Removal Tool.
Remote Devices Tracking by Time and Location
(version 6.0.1. and higher)
The Barracuda Web Filter maintains a log of remote user and mobile devices seen by the Barracuda Web Security Agent (WSA) and the
Barracuda Safe Browser. Logged data includes the date, time and location from which a remote user logged in or a mobile device was
synchronized with Barracuda Web Filter settings. See the ADVANCED > Remote Devices page to view and configure. Logged fields include:
Username - Username created for the device user login.
Domain - Domain the user is logged into
Device Name - Name given to the mobile device for identification
Device Type - Mobile device type, for example: iPad, iPhone, etc.
IP Address - IP address of the mobile device
Location - GPS coordinates of the mobile device
Last Seen - Date and time of the last user login or device synchronization with the Barracuda Web Filter
Task Manager
The ADVANCED > Task Manager page provides a list of system tasks that are in the process of being performed and also displays any errors
encountered when performing these tasks.
Some of the tasks that the Barracuda Web Filter tracks include:
Linked management setup
Configuration restoration
If a task takes a long time to complete, you can click Cancel next to the task name and then run the task at a later time when the system is less
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busy. The Task Errors section will list an error until you manually remove it from the list. Note that the errors are not phased out over time.
Audit Log of Configuration Changes
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The BASIC > Audit Log page displays updates to the configuration settings of the Barracuda Web Filter in conjunction with Role-based
Administration. This log provides the following information:
Date and time the Barracuda Web Filter processed the operation.
The name of the user that did the operation.
The role assigned to the user that did the operation.
The action performed by the user that did the operation:
add- Added a value for a field in the configuration.
set - Set a value for a field in the configuration.
del - Deleted a value for a field in the configuration.
The scope, or area of the Barracuda Web Filter affected by the operation:
global - Applies to global level variables in the configuration.
domain - Applies to a variable associated with a particular domain.
user - Applies to a particular Barracuda Web Filter user account.
policy - Operation was done to a variable for which you can select a Policy of either Authenticated or Unauthenticated users. For
example, BLOCK/ACCEPT > Content Filters, or BLOCK/ACCEPT > Applications.
Detailed information about the operation.
Which configuration variable affected by the operation, if any.
Original value before the operation
Changed value after the operation.
Log data can be exported to CSV file, and the rate of data streaming to the log can be adjusted.
Reporting 6.x
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Use the BASIC > Reports page to choose from more than 40 different system reports that can help you keep track of activity performed by the
Barracuda Web Filter. You can either generate a system report on-demand or configure the Barracuda Web Filter to automatically generate the
system reports on an hourly, daily, weekly or monthly basis and email the reports to specific email addresses or send them to an FTP or SMB
server. Reports can be anchored on user activity, content or actions.
Accurately Reporting User Browsing Times
Embedded web content is intelligently detected by the Barracuda Web Filter to maximize reporting accuracy. For example, a site such as cnn.co
m embeds requests to Facebook, twitter, and other social networks. While a user visiting the news site might not explicitly click on any of the
embedded links, the embedded content still makes periodic web requests. On a report, this could appear as if the user visited cnn, facebook and
twitter and spent 15 minutes browsing each site.
While this is accurate, it can misrepresent the user’s actions on reports that are reviewed by the Human Resources department, for example. The
Barracuda Web Filter can make the distinction between such embedded requests – also known as “referred requests” – and actual user visits and
distinguish them accordingly in the reports. Consequently, reports more accurately reflect user actions.
Session Time Versus Browse Time
Session time is the time calculated for each browsing session generated, with an idle timeout value of about 3 minutes. So if, for example, a user
visits cnn.com, but doesn't click anything else for more than 3 minutes, that's one session of 3 minutes for that user on cnn.com. If the user did
click around cnn.com within the 3 minute time frame, the session would continue to increase in length until there was a 3 minute idle time.
Browse time as shown in reports is the sum of all session times in a particular grouping (domain, category, user, etc).
For detailed descriptions of the system reports, see the online help for the BASIC > Reports page.
To clear traffic logs, see the BASIC > Web Log page.
Reporting 7.x
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Some of the reports and features noted in this article are specific to the Barracuda Web Filter version 7.0 and higher.
In this article:
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en
Report Set Grouped by Use Cases
Accurately Reporting User Browsing Times
Session Time Versus Browse Time
Clearing Traffic Logs
Report Set Grouped by Use Cases
Use the BASIC > Reports page to choose from more than 50 different system reports that can help you keep track of activity performed by the
Barracuda Web Filter. You can either generate a system report on-demand or configure the Barracuda Web Filter to automatically generate the
system reports on an hourly, daily, weekly or monthly basis and email the reports to specific email addresses or send them to an FTP or SMB
server.
Important
Some reports may contain URLs that are on block lists. If your Barracuda Web Filter is sending reports via email through a Barracuda
Spam & Virus Firewall, make sure to add the IP address of the Barracuda Web Filter to the IP and Port Exemptions list on the BLOCK
/ACCEPT > IP Block/Exempt page to prevent bad URLs from causing the emailed report to be blocked. If you are sending reports
through another spam filtering device or service, make sure to whitelist the IP address of the Barracuda Web Filter on that solution.
Reports can be anchored on user activity, content or bandwidth usage and, in version 7.0 and higher, are grouped as follows:
For Human Resources, Teachers and Managers
These reports are user friendly, easy to read and provide the following critical information:
Productivity reports reflecting user activity with social networking and other applications; for example:
Top Users by Browse Time on Gaming Sites
Top Social Networking Domains by Requests - may determine which domains you want to block, warn or monitor
Top YouTube Users by Bandwidth
Top Facebook Users by Browse Time
Top Users by Browse Time on Social Networking Sites
... and many more
Safety and Liability reports; for example:
Top Users by Requests to Intolerance and Hate Sites
Top Users by Requests to Anonymizer Sites - An anonymizer is a tool that attempts to make activity on the Internet untraceable.
It is a proxy server computer that acts as an intermediary and privacy shield between a client computer and the rest of the
Internet, hiding the client computer's identity (IP address).
Suspicious Keywords by Users - for detection of possible cyberbullying, mention of weapons,terrorism. See the BLOCK/ACCEP
T > Web App Monitor page for details.
For IT, system administrators
These report types show infection activity, blocked virus downloads, bandwidth usage by time frame and many other system performance-related
reports, such as:
Infection Activity
Malware Blocks – IP addresses from which requests were made to known spyware sites.
Virus Blocks – A list of blocked virus downloads during the specified time frame.
Web Activity
Session time, browse time by hour or time of day.
Popular IP addresses to which requests were made.
Categories (i.e. adult, gaming, leisure, etc.) by bandwidth, number of requests, browse time.
Users by session time, browse time.
Administrative
Audit Log for tracking logins and logouts to the web interface, as well as changes to the configuration by role.
Temporary Access Request Log – Log of activity by teachers who have been given credentials to request temporary access for
their students to domains that are typically regulated by system administrators. See Temporary Access for Education.
Temporary Access Requests by Domains, Users or Categories.
Network Activity
TCP Connection Usage
Daily Bandwidth
Web Requests Log
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Summary
Internet, Network and User activity summaries
Total Usage
For a complete list and detailed descriptions of the system reports, see the online help for the BASIC > Reports page.
Accurately Reporting User Browsing Times
Embedded web content is intelligently detected by the Barracuda Web Filter to maximize reporting accuracy. For example, a site such as cnn.co
m embeds requests to Facebook, Twitter, and other social networks. While a user visiting the news site might not explicitly click on any of the
embedded links, the embedded content still makes periodic web requests. On a report, this could appear as if the user visited CNN, Facebook
and Twitter and spent 15 minutes on each site.
While this is technically accurate, it can misrepresent the user’s actions on reports that are reviewed by the Human Resources department, for
example. The Barracuda Web Filter can make the distinction between such embedded requests – also known as “referred requests” – and actual
user visits in most cases, but there are some limitations due to the behavior of some client applications. Consequently, reports reflect estimates of
actual user browse and session times.
Important
In calculating browse times, the Barracuda Web Filter uses the HTTP referer (sic) header to make the distinction between embedded
requests and user visits. However, it is important to note that there are various client applications that limit the accuracy of calculating
browse times. Here are several examples:
Javascript that downloads assets from another site and may not set referal;
iOS apps that request web assets and do not set the referal;
Android apps that request web assets place the app package name in the referal.
Session Time Versus Browse Time
Session time is the time calculated for each browsing session generated, with an idle timeout value of about 3 minutes. So if, for example, a user
visits cnn.com, but doesn't click anything else for more than 3 minutes, that's one session of 3 minutes for that user on cnn.com. If the user did
click around cnn.com within the 3 minute time frame, the session would continue to increase in length until there was a 3 minute idle time.
Browse time as shown in reports is the sum of all estimated session times in a particular grouping (domain, category, user, etc).
Clearing Traffic Logs
To clear traffic logs, see the BASIC > Web Log page.
Report mapping 6.0.1 to 7.x
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Some Barracuda Web Filter reports were revised and renamed from version 6.0.1 to version 7.x. The following table maps reports across these
versions.
Version 6.0.1 and higher
Columns
Version 7.x
Columns
Users by Spyware Requests
User, Source IP, Request
Top Users by Requests to
Spyware Sites
User, Request
Users Activity Log
Time, Source IP, Destination IP,
Username, Action, Destination,
Details, Reason, Content, Size
Web Requests Log
Time, User, Action, URL,
Category, Content Type,
Bandwidth
Requests by User
Time, Username, Action,
Destination
Web Requests Summary
Time, User, Action, URL,
Bandwidth
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Applications by Requests
Application, Requests
Application Blocks
User, Requests
Total Bandwidth Usage
Bandwidth, Requests (only 1
record)
Total Usage - new report
Requests, Bandwidth, Duration
(only 1 record)
Virus Downloads
User, Source IP, Requests,
Threat
Virus Blocks
User, Requests
Sessions by Categories
Category, User, Source IP,
Session Begin, Session End,
Session Time, Requests,
Bandwidth
See Categories by Session
Time and Categories by
Number of Sessions reports
Not Available
N/A
TCP Connection Usage - new
report
Statistics on TCP connections average, max, median, etc. for
the time frame.
Not Available
N/A
TCP Connection Log - new
report
Time(yyyy-mm-dd hh:mm:ss),
TCP Connections
Total Web Requests
Requests, Bandwidth (only 1
record)
See Total Usage report
Total Browse Time
Time, Requests, Bandwidth (only
1 record)
See Browse Time by Hour and
Browse Time by Time of Day r
eports
Infections
User(displays Username along
with IP), Source IP, Requests,
Threat
See Infection Activity reports
Sessions by Domain
Domain Name, User, Source IP,
Session Begin, Session End,
Category, Session Time,
Requests, Bandwidth
See Domains by Session Time
and Domains by Number of
Sessions reports
How to Set Up Alerts and SNMP Monitoring
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Alerts and Notifications
Emailed System Alerts
Use the BASIC > Administration page to configure the Barracuda Web Filter to automatically email system alerts to the email addresses you
specify. System alerts notify you when:
Your Energize Update subscription is about to expire
New virus definitions are available
New firmware updates are available
Your system is low on disk space
The Barracuda Web Filter Operating Mode changes to Safe Mode.
Threat Alerts
When any virus downloads or spyware downloads are detected in the HTTP data path, threat alerts can be sent to the email address(es) you
specify in the Email Notifications section of the BASIC > Administration page.
Setting up SNMP Query, Alerts and Traps
While the Barracuda Web Filter will send email alerts to the System Alerts Email Address as specified on the BASIC > Administration page,
these alerts are limited and do not include latency, inqueue sizes, and other system health information. To monitor more specific information on a
Barracuda Web Filter, Barracuda Networks recommends using SNMP monitoring with an SNMP server. The Barracuda Web Filter 410 and higher
offers the ability to monitor various settings via SNMP alerts or traps, including system statistics such as:
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System Load Averages (1m/5m/15m)
Memory Utilization
System Uptime
Raid Status
CPU idle times
To query the Barracuda Web Filter for these statistics via SNMP, you must do the following in the SNMP Manager section of the BASIC >
Administration page:
1. Set Enable SNMP to Yes.
2. Enter the SNMP Community String.
3. Select the SNMP Version. The Barracuda Web Filter supports both SNMP version v2c and v3. Select version v3 for more secure
transmission. Version v3 provides the following options for additional security (make sure that the settings you select are supported by
your SNMP monitor):
- Authentication methods MD5 or SHA, where SHA is the more secure method.
- Encryption methods DES or AES, where AES is the more secure method.
4. Enter the IP address of the server that will be making the SNMP connection in the Allowed SNMP and API IP/Range section of the
page. IP addresses entered in this field are allowed to access the Barracuda Web Filter via SNMP queries to retrieve error information, or
via the API to configure the device.
You can configure SNMP traps by listing one or more IP addresses to which the Barracuda Web Filter has access for sending SNMP traps as
configured by a client.
SNMP MIBs
Click to download the Barracuda Web Filter SNMP MIB and the Barracuda Reference MIB. You can monitor objects included in these MIBs either
from custom scripts or from your SNMP monitor.
Barracuda Reference MIB
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Missing the language English in this article! Please add the language, otherwise this article can not be displayed properly.
Barracuda Web Filter SNMP MIB
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You can monitor objects included in this MIB either from custom scripts or from your SNMP monitor. See also Barracuda Reference
MIB.
Barracuda-SPYWARE DEFINITIONS ::=BEGIN
IMPORTS
MODULE-IDENTITY, OBJECT-TYPE, INTEGER
FROM SNMPv2-SMI
barracuda
FROM Barracuda-REF;
bspyware MODULE-IDENTITY
LAST-UPDATED "201011040000Z"
ORGANIZATION "Barracuda Networks, Inc."
CONTACT-INFO
"
Barracuda Networks Inc.
3175 S. Winchester Blvd.
160
Campbell, CA 95008
"
DESCRIPTION
"
Barracuda Web Filter MIB.
Provides:
Objects:
* 1.3.6.1.4.1.20632.3.1.2 -- ActiveTCPConnections
* 1.3.6.1.4.1.20632.3.1.3 -- Throughput
* 1.3.6.1.4.1.20632.3.1.4 -- PolicyBlocks
* 1.3.6.1.4.1.20632.3.1.5 -- SpywareWebHitBlocks
* 1.3.6.1.4.1.20632.3.1.6 -- SpywareDownloadBlock
* 1.3.6.1.4.1.20632.3.1.7 -- VirusDownloadBlock
* 1.3.6.1.4.1.20632.3.1.8 -- SpywareProtocolBlocks
* 1.3.6.1.4.1.20632.3.1.9 -- HTTPTrafficAllowed
* 1.3.6.1.4.1.20632.3.1.10 -- system
* 1.3.6.1.4.1.20632.3.1.10.1
-- cpuFanSpeed
* 1.3.6.1.4.1.20632.3.1.10.2
-- systemFanSpeed
* 1.3.6.1.4.1.20632.3.1.10.3
-- cpuTemperature
* 1.3.6.1.4.1.20632.3.1.10.4
-- systemTemperature
* 1.3.6.1.4.1.20632.3.1.10.5
-- firmwareStorage
* 1.3.6.1.4.1.20632.3.1.10.6
-- logStorage
* 1.3.6.1.4.1.20632.3.1.11 -- SystemUpTime
Traps:
* 1.3.6.1.4.1.20632.3.2 -- traps
* 1.3.6.1.4.1.20632.3.2.2 -- ActiveTCPConnectionsHigh
* 1.3.6.1.4.1.20632.3.2.3 -- ThroughputHigh
* 1.3.6.1.4.1.20632.3.2.4 -- cpuTempHigh
* 1.3.6.1.4.1.20632.3.2.5 -- sysTempHigh
* 1.3.6.1.4.1.20632.3.2.6 -- cpuFanDead
* 1.3.6.1.4.1.20632.3.2.7 -- sysFanDead
* 1.3.6.1.4.1.20632.3.2.8 -- firmwareStorageHigh
* 1.3.6.1.4.1.20632.3.2.9 -- logStorageHigh
* 1.3.6.1.4.1.20632.3.2.10 -- lanStatus
* 1.3.6.1.4.1.20632.3.2.11 -- wanStatus
"
161
::= { barracuda 3 }
--- Objects
-ActiveTCPConnections OBJECT-TYPE
SYNTAX
INTEGER
MAX-ACCESS read-only
STATUS
current
DESCRIPTION
"Web Filter active tcp connections."
::= { bspyware 2 }
Throughput OBJECT-TYPE
SYNTAX
INTEGER
MAX-ACCESS read-only
STATUS
current
DESCRIPTION
"Web Filter throughput."
::= { bspyware 3 }
PolicyBlocks OBJECT-TYPE
SYNTAX
INTEGER
MAX-ACCESS read-only
STATUS
current
DESCRIPTION
"Web Filter policy blocks"
::= { bspyware 4 }
SpywareWebHitBlocks OBJECT-TYPE
SYNTAX
INTEGER
MAX-ACCESS read-only
STATUS
current
DESCRIPTION
"Web Filter spyware web hit blocks"
::= { bspyware 5 }
SpywareDownloadBlock OBJECT-TYPE
162
SYNTAX
INTEGER
MAX-ACCESS read-only
STATUS
current
DESCRIPTION
"Web Filter spyware download block"
::= { bspyware 6 }
VirusDownloadBlock OBJECT-TYPE
SYNTAX
INTEGER
MAX-ACCESS read-only
STATUS
current
DESCRIPTION
"Web Filter virus download block"
::= { bspyware 7 }
SpywareProtocolBlock OBJECT-TYPE
SYNTAX
INTEGER
MAX-ACCESS read-only
STATUS
current
DESCRIPTION
"Web Filter spyware protocol block"
::= { bspyware 8 }
HTTPTrafficAllowed OBJECT-TYPE
SYNTAX
INTEGER
MAX-ACCESS read-only
STATUS
current
DESCRIPTION
"Web Filter HTTP traffic allowed"
::= { bspyware 9 }
system OBJECT-GROUP
OBJECTS
{
cpuFanSpeed,
systemFanSpeed,
163
cpuTemperature,
systemTemperature,
logStorage,
firmwareStorage
}
STATUS
current
DESCRIPTION
"System parameters."
::= { bspyware 10 }
cpuFanSpeed OBJECT-TYPE
SYNTAX
Integer32
MAX-ACCESS read-only
STATUS
current
DESCRIPTION
"CPU fan speed in RPM."
::= { system 1 }
systemFanSpeed OBJECT-TYPE
SYNTAX
Integer32
MAX-ACCESS read-only
STATUS
current
DESCRIPTION
"System fan speed in RPM."
::= { system 2 }
cpuTemperature OBJECT-TYPE
SYNTAX
Integer32
MAX-ACCESS read-only
STATUS
current
DESCRIPTION
"CPU temperature in degrees Celsius."
::= { system 3 }
systemTemperature OBJECT-TYPE
SYNTAX
Integer32
MAX-ACCESS read-only
164
STATUS
current
DESCRIPTION
"CPU temperature in degrees Celsius."
::= { system 4 }
firmwareStorage OBJECT-TYPE
SYNTAX
Integer32
MAX-ACCESS read-only
STATUS
current
DESCRIPTION
"Firware storage utilization in percentage."
::= { system 5 }
logStorage OBJECT-TYPE
SYNTAX
Integer32
MAX-ACCESS read-only
STATUS
current
DESCRIPTION
"Log storage utilization in percentage."
::= { system 6 }
SystemUpTime OBJECT-TYPE
SYNTAX
INTEGER
MAX-ACCESS read-only
STATUS
current
DESCRIPTION
"Web Filter system uptime."
::= { bspyware 11 }
--- Traps
--
bspywaretraps OBJECT IDENTIFIER ::= { bspyware 2 }
ActiveTCPConnectionsHigh NOTIFICATION-TYPE
165
STATUS
current
DESCRIPTION
"Number of active tcp connections are high than threshold."
::= { bspywaretraps 2 }
ThroughputHigh NOTIFICATION-TYPE
STATUS
current
DESCRIPTION
"Throughput is high."
::= { bspywaretraps 3 }
cpuTempHigh NOTIFICATION-TYPE
STATUS
current
DESCRIPTION
"CPU temperature exceeded its threshold."
::= { bspywaretraps 4 }
sysTempHigh NOTIFICATION-TYPE
STATUS
current
DESCRIPTION
"System temperature exceeded its threshold."
::= { bspywaretraps 5 }
cpuFanDead NOTIFICATION-TYPE
STATUS
current
DESCRIPTION
"CPU fan is dead."
::= { bspywaretraps 6 }
sysFanDead NOTIFICATION-TYPE
STATUS
current
DESCRIPTION
"System fan is dead."
::= { bspywaretraps 7 }
firmwareStorageHigh NOTIFICATION-TYPE
166
STATUS
current
DESCRIPTION
"Firmware storage exceeded its threshold."
::= { bspywaretraps 8 }
logStorageHigh NOTIFICATION-TYPE
STATUS
current
DESCRIPTION
"Log storage utilization exceeded its threshold."
::= { bspywaretraps 9 }
lanStatus NOTIFICATION-TYPE
STATUS
current
DESCRIPTION
"Current LAN Status for web filter."
::= { bspywaretraps 10 }
wanStatus NOTIFICATION-TYPE
STATUS
current
DESCRIPTION
"Current WAN Status for web filter."
::= { bspywaretraps 11 }
END
How to Set Up Barracuda Cloud Control
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Barracuda Cloud Control enables administrators to manage, monitor and configure multiple Barracuda Web Filters (firmware version 4.3 and
higher) at one time from one console. The same tabbed pages are available on Barracuda Cloud Control for managing all aspects of your
Barracuda Web Filter configuration that you see in each individual web interface, and you can create aggregated reports for multiple devices from
the Barracuda Cloud Control console. You can connect one or more Barracuda Web Filters to Barracuda Cloud Control by doing the following:
1. If you don't already have an account with Barracuda Networks, see Create a Barracuda Cloud Control Account.
2. Make a note of your username (email address) and password.
3. Log into your Barracuda Web Filter as the administrator. From the ADVANCED > Firmware Upgrade page, check to make sure you
have the latest firmware installed. If not, download and install it now.
4. From the ADVANCED > Cloud Control page, enter the Barracuda Networks username and password you created and click Yes to
connect to Barracuda Cloud Control. Note that your Barracuda Web Filter can connect with only one Barracuda Cloud Control account at
a time.
5. Log into Barracuda Cloud Control with your username and password and you will see your Barracuda Web Filter statistics displayed on
the BASIC > Status page. To access the web interface of your Barracuda Web Filter, click on the link in the Products column in the Appl
iance Control Centerpane on the left side of the page. Or you can click on the product name in the Product column of the Unit Health
pane on the right side of the page.
6. Follow steps 3 and 4 to connect every subsequent Barracuda Web Filter to Barracuda Cloud Control.
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To disconnect your Barracuda Web Filter from Barracuda Cloud Control, from the ADVANCED > Cloud Control page, enter the Barracuda Cloud
Control username and password and click No for Connect to Barracuda Cloud Control.
For details on using Barracuda Cloud Control, please see Barracuda Cloud Control - Overview.
Troubleshooting
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In this article:
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Basic Troubleshooting Tools
Connect to Barracuda Support Servers
Rebooting the System in Recovery Mode
Reboot options
Replacing a failed system
Barracuda Instant Replacement Service
Basic Troubleshooting Tools
The ADVANCED > Troubleshooting page provides various tools that help troubleshoot network connectivity issues that may be impacting the
performance of your Barracuda Web Filter.
For example, you can test the connection between the Barracuda Web Filter to Barracuda Central to make sure it can successfully download the
latest virus and spyware definitions. You can also ping or telnet to devices from the Barracuda system, perform a traceroute from the Barracuda
system to a destination server, run a packet capture, and other tasks.
Connect to Barracuda Support Servers
In the Support Diagnostics section of the ADVANCED > Troubleshooting page, you can initiate a connection between your Barracuda Spam &
Virus Firewall and the Barracuda Networks Technical Support Center which will allow technical support engineers to troubleshoot any issues you
may be experiencing.
Rebooting the System in Recovery Mode
If your Barracuda Web Filter experiences a serious issue that impacts its core functionality, you can use diagnostic and recovery tools that are
available at the reboot menu to return your system to an operational state.
Before you use the diagnostic and recovery tools, do the following:
Use the built-in troubleshooting tools on the ADVANCED > Troubleshooting page to help diagnose the problem.
Perform a system restore from the last known good backup file.
Contact Barracuda Networks Technical Support for additional troubleshooting tips.
As a last resort, you can reboot your Barracuda Web Filter and run a memory test or perform a complete system recovery, as described in this
section.
To perform a system recovery or hardware test:
1. Connect a monitor and keyboard directly to your Barracuda Web Filter.
2. Reboot the system by doing one of the following:
- In the web interface: Go to the BASIC > Administration page, navigate to the System Reload/Shutdown section, and click Restart.
- At the front panel of the Barracuda Web Filter: Press the Power button on the front panel to turn off the system, and then press the Pow
er button again to turn the system on.
The splash screen displays with the following three boot options:
Barracuda
Recovery
Hardware_Test
3. Use your keyboard to select the desired boot option, and press the Enter key.
You must select the boot option within three seconds after the splash screen appears. If you do not select an option within three seconds,
the Barracuda Web Filter starts up in Normal mode (first option).
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3.
For a description of each boot option, refer to Reboot Options below.
To stop a hardware test, reboot your Barracuda Web Filter by pressing the Ctrl-Alt-Del keys.
Reboot options
The table below describes the options available at the reboot menu.
Reboot Options
Description
Barracuda
Starts the Barracuda Web Filter in the normal (default) mode. This
option is automatically selected if no other option is specified within
the first three seconds of the splash screen appearing.
Recovery
Displays the Recovery Console, where you can select the following
options:
Perform file system repair—Repairs the file system on
XFS-based Barracuda Web Filter. Select this option only if the
serial number on your Barracuda Web Filter is below 24364;
otherwise select the Perform Full System Re-image option.
Perform full system re-image—Restores the factory settings
on your Barracuda Web Filter and clears out the configuration
information. Select this option if the serial number on your
Barracuda Web Filter is 24364 or above.
Enable remote administration—Turns on reverse tunnel that
allows Barracuda Networks Technical Support to access the
system. Another method for enabling remote administration is to
click Establish Connection to Barracuda Support Center on
the ADVANCED > Troubleshooting page.
Run diagnostic memory test—Runs a diagnostic memory test
from the operating system. If problems are reported when
running this option, we recommend running the Hardware_Test
option next.
Hardware_Test
Performs a thorough memory test that shows most memory related
errors within a two-hour time period. The memory test is performed
outside of the operating system and can take a long time to complete.
Reboot your Barracuda Web Filter to stop the hardware test.
Replacing a failed system
Before you replace your Barracuda Web Filter, use the tools provided on the ADVANCED > Troubleshooting page to try to resolve the problem.
Barracuda Instant Replacement Service
In the event that a Barracuda Web Filter system fails and you cannot resolve the issue, customers that have purchased the Instant Replacement
service can call t and receive a new unit within 24 hours.
After receiving the new system, ship the failed Barracuda Web Filter back to Barracuda Networks at the address below with an RMA number
marked clearly on the package. Barracuda Networks can provide details on the best way to return the unit.
Barracuda Networks
3175 S. Winchester Blvd
Campbell, CA 95008
attn: RMA # <your RMA number>
To set up the new Barracuda Web Filter so it has the same configuration as your old failed system, restore the backup file from the old
system onto the new system, and then manually configure the new system’s IP information on the BASIC > IP Configuration page.
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For information on restoring data, refer to How to Back Up and Restore Your System Configuration.
Syslog and the Barracuda Web Filter
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In this article:
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What is the Barracuda Syslog?
Enabling Syslog
Barracuda Syslog Format - New for Version 7.0 and Higher
Syslog Examples
Detailed Description
What is the Barracuda Syslog?
The Barracuda Web Filter generates syslog messages as a means of logging both changes to the web interface configuration and what happens
to each traffic request performed by your users. The syslog messages are stored in text file format on the Barracuda Web Filter and can be sent
to a remote server configurable by the administrator. There are two syslog outputs you can monitor: the Web Interface syslog and the Web Traffic
syslog.
This article describes each element of a syslog message so you can better analyze why your Barracuda Web Filter performs a particular action
for each traffic request.
Enabling Syslog
To enable syslog reporting on your Barracuda Web Filter, log into the web interface and navigate to the Advanced > Syslog page. For both the
Web Traffic Syslog and Web Interface Syslog, enter the IP address of the syslog server that you want to direct messages to. If you are running
syslog on a UNIX machine, be sure to start the syslog daemon process with the “-r” option so that it can receive messages from sources other
than itself. Windows users will have to install a separate program to use syslog because the Windows OS does not include syslog capabilities. Ki
wi Syslog is a popular solution, but many others are available that are both free and commercial.
Syslog messages are, by default, sent to the standard syslog UDP port 514. However, if your syslog server blocks UDP and/or communicates via
TCP protocol, the Barracuda Web Filter will transmit syslog data via TCP. If there are any firewalls between the Barracuda Web Filter and the
server receiving the syslog messages, be sure that port 514 is open on the firewalls. The syslog messages arrive on the mail facility at the debug
priority level. As the Barracuda Web Filter uses the syslog messages internally for its own message logging, it is not possible to change the facility
or the priority level. For more information about where the syslog messages will be placed, refer to the documentation of your syslog server.
Barracuda Syslog Format - New for Version 7.0 and Higher
Each syslog message contains three types of information:
Section 1: Basic Information
Section 2: Transparent Proxy Information
Section 3: Policy Engine Information
This section identifies each element of the syslog based on the following example:
Sep 19 17:07:07 Barracuda httpscan[3365]: 1158710827 1 10.1.1.8 172.27.72.27 text/html 10.1.1.8 http://www.sex.com/ 2704
3767734cc16059e52447ee498d31f822 ALLOWED CLEAN 2 1 0 1 3 - 1 adult 0 - 0 sex.com adult,porn ANON
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The following table describe each element of a syslog message.
Field Name
Example
Description
Epoch Time
1158710827
Seconds since 1970, unix timestamp.
Src IP
10.1.1.8
IP address of the client.
Dest IP
172.27.72.27(72.32.54.242)
IP address for the page that was blocked by
the Barracuda Web Filter.
Content Type
text/html
HTTP header designated content type.
Src IP
10.1.1.8
IP address of the client.
Destination URL
http://www.sex.com
The URL the client tried to visit.
Data Size
2704
The size of the content.
MD5 anchor
37…22
The anchor used for parsing. This
information is not usually important.
Action
ALLOWED
Action performed by the transparent proxy.
The type of actions include:
• ALLOWED: Traffic was processed by the
transparent proxy and no virus or spyware
was detected.
• BLOCKED: Traffic was blocked by the
transparent proxy most likely because the
proxy detected virus or spyware.
• DETECTED: Another process detected
outbound spyware activity.
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Reason
CLEAN
Reason for the action:
• CLEAN: Traffic does not contain any virus
or spyware.
• VIRUS: Traffic was blocked because it
contains a virus.
• SPYWARE: Traffic was blocked because it
contained spyware.
Details
Stream=>Eicar-Test-Signature FOUND
The name of the virus or spyware that was
detected in the blocked traffic.
(only for blocked traffic)
Syslog Examples
Example 1. Clean, policy-allowed traffic
The following example shows a syslog message for clean traffic going to an allowed website (CNN.com). The term “clean” represents traffic that
does not contain viruses or spyware.
Sep 19 17:06:59 Barracuda httpscan[3365]: 1158710819 1 10.1.1.8 64.236.16.139 image/gif 10.1.1.8 http://i.cnn.net/cnn/.element/img/1.3/video/t
ab.middle.on.gif 1744 3767734cc16059e52447ee498d31f822 ALLOWED CLEAN 2 0 0 0 0 - 0 - 0 - 0 cnn.net news ANON
Example 2: Clean, policy-denied traffic
The following example shows “clean” traffic going to a website that is blocked by one of the Barracuda Web Filter policies. In this example, the
website sex.com is blocked by the…
Sep 19 17:07:07 Barracuda httpscan[3365]: 1158710827 1 10.1.1.8 172.27.72.27 text/html 10.1.1.8 http://www.sex.com/ 2704
3767734cc16059e52447ee498d31f822 ALLOWED CLEAN 2 1 0 1 3 - 1 adult 0 - 0 sex.com adult,porn ANON
Example 3: Virus-infected traffic blocked by the Barracuda Web Filter
The following example shows traffic that has been blocked by the Barracuda Web Filter because the traffic contains a known virus.
Sep 19 17:08:00 Barracuda httpscan[3365]: 1158710880 1 10.1.1.8 127.0.0.1 - 10.1.1.8 http://www.eicar.org/download/eicar.com.txt 0
3767734cc16059e52447ee498d31f822 BLOCKED VIRUS stream=>Eicar-Test-Signature FOUND 2 0 0 0 0 - 0 - 0 - 0 eicar.org
computing-technology ANON
Detailed Description
The following table describes each element of a syslog message.
Field Name
Example
Description
Epoch Time
1158710827
Seconds since 1970, unix timestamp.
Src IP
10.1.1.8
IP address of the client.
Dest IP
172.27.72.27(72.32.54.242)
IP address for the page that was blocked by
the Barracuda Web Filter.
Content Type
text/html
HTTP header designated content type.
Src IP
10.1.1.8
IP address of the client.
Destination URL
http://www.sex.com
The URL the client tried to visit.
Data Size
2704
The size of the content.
MD5 anchor
37…22
The anchor used for parsing. This
information is not usually important.
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Action
ALLOWED
Action performed by the transparent proxy.
The type of actions include:
• ALLOWED: Traffic was processed by the
transparent proxy and no virus or spyware
was detected.
• BLOCKED: Traffic was blocked by the
transparent proxy most likely because the
proxy detected virus or spyware.
• DETECTED: Another process detected
outbound spyware activity.
Reason
CLEAN
Reason for the action:
• CLEAN: Traffic does not contain any virus
or spyware.
• VIRUS: Traffic was blocked because it
contains a virus.
• SPYWARE: Traffic was blocked because it
contained spyware.
Details
Stream=>Eicar-Test-Signature FOUND
The name of the virus or spyware that was
detected in the blocked traffic.
Format Ver
2
The version of the policy engine output. The
most current 3.0 firmware uses policy engine
version 2.
Match flag
1
Whether an existing policy matched the
traffic. 1=Yes and 0=No.
TQ flag
0
Whether the rule is time-qualified. For
Example, during work hours 9am - 5pm.
1=Yes and 0=No.
Action Type
1
The action performed by the policy engine on
this request:
(only for blocked traffic)
0 : allowed
1 : denied
2 : redirected
3 : rewrote by add/set a new parameter in
query
4 : rewrote by delete an existing parameter in
query
5 : matched a rule and allowed but marked
as monitored
6 : branched to another rule set.
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Src Type
3
If matched by source, what is its type:
0 : always, matches any source
1 : group, matched by group id
2 : ipv4addr, matched by an Ipv4 address
3 : login, matched by login
4 : login any, matched any authenticated
user
5 : min_score, matched due to minimum
infection threshold breached.
Src Detail
-
Any detail related to the matched source.
Dst Type
1
If matched by destination, what is its type?
0 : always, matched any destination
1 : category, matched a particular category
2 : category any, matched any category
3 : domain, matched due to domain or
subdomain
4 : mimetype, matched due to mime-type
5 : spyware hit, matched due to spyware hit
6 : uri path regex, matched URI path
7 : uri regex, matched any part of the URI
8 : application, matches an application
characterstics
Dst Detail
adult
Detail of the matched destination. In this
case it is the first matched category, which is
adult.
Spy Type
0
If it is a spyware hit, what is its type:
0: allow
1: block
2: infection
Spy ID
-
The name of the spyware if matched due to
spyware hit.
Infection Score
0
Weight of the infection. Currently, mostly 0.
Matched Part
sex.com
The part of the rule that matched.
Matched Category
adult,porn
The policy category that matched the traffic.
User Info
ANON
User information:
• ANON: Anonymous, unauthenticated users
• ldap: Username: LDAP user info
• username: Non-LDAP user info (users
created create in the admin interface).
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Referer Domain
http://www.cnn.com/ www.cnn.com
(Version 7.0 and higher) If enabled, displays
domain of referer. If disabled, displays a
dash '–' . (Applies to version 7.0 and higher).
Referer Category
news
(Version 7.0 and higher) If enabled, displays
the category to which the referer domain
belongs. If disabled, displays a dash '–'. (Ap
plies to version 7.0 and higher).
WSA Remote User Type
1
(Version 7.0 and higher) If traffic comes from
a remote device, indicates whether it came
from a Windows WSA client (wsa), a
Macintosh WSA client (iwsa) or the
Barracuda Safe Browser (an iOS device). (A
pplies to version 7.0 and higher).
0 : local traffic (not from a remote device)
1 : remote agent (wsa or iwsa)
2 : Barracuda Safe Browser
Maintenance
en
In this article:
en
Release Notes and Updating the Barracuda Web Filter Firmware
Updating the Firmware of Linked Systems
Updating the Spyware, Virus, Category, Application and Security Definitions
Reloading, Restarting, and Shutting Down the System
Release Notes and Updating the Barracuda Web Filter Firmware
Important
Before updating the firmware on your Barracuda Web Filter, Barracuda recommends reading the Release Notes. For a description of
new features in a release, see What's New in the Barracuda Web Filter.
Use the ADVANCED > Firmware Update page to manually update the firmware version of the system or revert to a previous version. The only
time you should revert back to an old firmware version is if you recently downloaded a new version that is causing unexpected problems. In this
case, call Barracuda Networks Technical Support before reverting back to a previous firmware version.
Updating the Firmware of Linked Systems
If a system is part of a cluster, we recommend changing the system’s Mode in the Clustered Systems section of the ADVANCED > Linked
Management page to Standby before you upgrade its firmware, and then repeat this process on each system in the cluster. Once the firmware on
each system has been upgraded, you can then change the mode on each system back to Active.
Changing a linked system to Standby mode before upgrading prevents a system on a more recent firmware version from trying to synchronize its
configuration with a system on an earlier firmware version. If you have the latest firmware version already installed, the Download Now button on
the ADVANCED > Firmware Update page is disabled.
Applying a new firmware version results in a temporary loss of service. For this reason, you should apply new firmware versions during
non-business hours.
Updating the Spyware, Virus, Category, Application and Security Definitions
175
Use the ADVANCED > Energize Updates page to manually or automatically update your Barracuda Web Filter with the most current spyware,
virus, category, application and security definitions. Barracuda Networks recommends that the Automatic Updates setting for your spyware and
virus definitions be set to On so your Barracuda Web Filter receives the latest definitions as soon as new threats are identified by Barracuda
Central.
This should be one of settings the administrator configures in the initial installation of the Barracuda Web Filter.
Reloading, Restarting, and Shutting Down the System
Use the System Reset/Shutdown section on the BASIC > Administration page to shutdown, reset, and reload the Barracuda Web Filter.
Shutting down the system powers off the unit. Restarting the system reboots the unit. Reloading the system re-applies the system configuration.
You can also reset the system by pressing the RESET button on the front panel of the system. The following actions occur:
Reboots the system
Resets the IP address if held down for 5 seconds or more. Do not press and hold the RESET button for longer than a few seconds –
doing so changes the IP address of the system. Pushing and holding the RESET button for:
5 seconds changes the IP address to the default of 192.168.200.200
8 seconds changes the IP address to 192.168.1.200
12 seconds changes the IP address to 10.1.1.200
How to Back Up and Restore Your System Configuration
en
Backing Up and Restoring Your System Configuration
The ADVANCED > Backup page lets you back up and restore the configuration of your Barracuda Web Filter. You should back up your system
on a regular basis in case you need to restore this information on a replacement Barracuda Web Filter or in the event your current system data
becomes corrupted.
If you are restoring a backup file on a new Barracuda Web Filter that is not yet configured, you first need to assign your new system an IP address
and DNS information on the BASIC > IP Configuration page. Note the following about the backup file:
Do not edit backup files. Any configuration changes you want to make need to be done via the web interface. The configuration backup
file contains a checksum that prevents the file from being uploaded to the system if any changes are made.
You can safely view a backup file in Windows WordPad or Microsoft Word. You should avoid viewing backup files in Windows Notepad
because the file can become corrupted if you save the file from this application.
The following information is not included in the backup file:
System password
System IP information
DNS information
Restoring a Backup
Restoring a backup simply requires browsing your local system with the click of a button on the ADVANCED > Backup page and selecting a
backup file. Please see the online help on that page for details about restoring backups. Please note that restoring a backup will overwrite the
current configuration.
Caution
Do not restore a configuration file onto a machine that is currently part of a cluster. All cluster information will be lost and the units will
need to be re-clustered if this happens.
Web Use Categories
en
The Barracuda Web Filter URL filtering engine uses one of the most extensive content definition databases, covering some of the highest risk
websites on the Internet.
en
176
The websites in the Barracuda Networks database are organized into 96 content categories (subcategories) which are grouped below by
supercategories.
When you create rules that block categories of websites, you can choose a supercategory to block, or you can drill down and block websites at
the subcategory level. See Related Articles listed at the end of this article for details.
Bandwidth
Websites delivering content that can use large amounts of network resources.
Category
Criteria
Streaming Media
Websites that provide streaming audio and video, or software and
tools for streaming media.
Streaming Radio/TV
Websites that provide streaming radio or TV.
Advertisements & Popups
Websites that host or serve advertisements or provide software that
serves advertisements.
Media Downloads
Websites that provide downloads of music and video content in any
format.
Media Sharing
Websites that allow posting and sharing of music and video content in
any format.
Commerce
Websites that contain business information or facilitate commercial transactions.
Category
Criteria
Auctions & Classifieds
Websites that allow bidding and selling of items and services. Does
not include non-selling related advertising.
Business
Websites that provide business-related overview, planning and
strategy information.
Finance & Investment
Websites that provide financial information or access to online
banking.
Real Estate
Websites that provide residential and commercial property sales and
rental information, listings and services.
Shopping
Websites that sell goods and services, but not marketing or ordering
websites for single products.
Stock Trading
Websites that allow monitoring, purchase, or sale of stocks.
Communications
Websites that let users communicate through web browsers.
Category
Criteria
Chat
Websites that provide Web-based messaging and chat rooms,
including IRC and social networking chat functions.
Peer-to-Peer
Websites that distribute file sharing software or allow the exchange of
files between users.
Web-based Email
Websites that enable sending, reading and archiving of email.
177
Instant Messaging
Websites that provide instant messaging software such as instant
messaging clients or chat clients that are not Web-based.
Messaging
Websites that allow users to send and receive messages, e.g.
SMS,MMS, voice mail, or FAX.
Mobile Communications
Websites that provide support information for mobile communication
devices.
Online Meetings
Websites that enable multiple users to interact transparently with
each other through messaging, audio or video connections.
Web-based Telephony
Websites that enable voice communication over the Web.
Information
Websites that provide searching, general news and information, including business content.
Category
Criteria
Education & Reference
Websites that provide academic information about schools or
education related topics.
Forums & Newsgroups
Websites containing user-generated Web logs, discussion forums or
wikis.
Government & Legal
Websites maintained by domestic and foreign government and
military agencies.
Health & Medicine
Websites that provide health and wellness material or information
about health products and service providers.
History
Websites that provide historical content.
Job Search & Career Development
Websites that enable users to search for job openings and career
opportunities, either with specific companies or job boards.
Motor Vehicles
Websites containing information and marketing for cars, auto parts
and services.
News
Websites that contain general news information on a local, national
and international level.
Advocacy/NGO
Websites for groups that promote or defend specific causes.
Religion
Websites that include content related to spirituality, religion, and
philosophy.
Moderated Forums
Websites monitored by an authority who can prevent posting of
inappropriate material.
Political Issues
Websites that contain opinion and political information, groups and
discussions.
Professional Networking
The subset of social networking websites which includes content
intended exclusively for businesses or professionals.
Public Information
Websites allowing search and access of the public records of people
or organizations.
Technical/Business Forums
Websites which allow discussions or posting of user-generated
content related to business or technical development.
Usenet News
Websites providing access to Usenet news groups or other bulletin
boards.
178
Leisure
Entertainment and personal websites that are normally not business-related.
Category
Criteria
Marketing & Merchandising
Websites that provide information about products and services not
available on the Web.
Blogs & Wikis
Websites allowing users to post content, edit and re-post frequently.
Arts & Society & Culture
Websites that display art galleries, information about artists and
ethnic and cultural heritage.
Comics & Humor & Jokes
Websites containing comical or funny content.
Entertainment
Websites providing information on theater arts, movies, concerts, tv,
radio and other amusements, or about celebrities of those venues.
Food & Dining
Websites with information, reviews, and online ordering for
restaurants, bars, and catering.
Game Playing & Game Media
Websites that provide video game information or enable the online
playing of games.
Hobbies & Recreation
Websites dedicated to recreational activities and hobbies, or
organizations and businesses dedicated to recreation, such as
amusement parks.
Kids Sites
Websites that are family-oriented and geared toward children.
Personals & Dating
Websites that enable users to meet and interact with each other for
the purposes of dating or making friends.
Social Networking
Websites that enable friends to interact and share information, but not
for the purposes of dating.
Sports
Websites with information and news about amateur and professional
sports.
Travel
Websites that provide information about travel destinations or allow
online booking of travel plans.
Digital Cards
Websites that enable the sending and receiving of digital postcards
and greeting cards.
Fashion & Beauty
Websites that provide information or products related to fashion and
beauty.
Hosted Personal Pages
Websites which allow users to design and post personal websites.
Liability
Users may be committing crimes or exposing the organization to legal liability with these sites.
Category
Criteria
Criminal Activity
Websites that provide information on how to commit illegal activities,
perpetrate scams or commit fraud.
Illegal Drugs
Websites that provide information on the manufacturing or selling of
illegal drugs or prescription drugs obtained illegally.
Illegal Software
Websites that provide information about or downloads of pirated
software.
179
Academic Cheating
Websites that advocate or assist plagiarism or provide or sell
questionable educational material.
Propriety
Websites that are intended for mature or adult users only.
Category
Criteria
Text/Audio Only
Websites that contain text or audio only, but no pictures.
Adult Content
These websites include content intended for legitimate reproductive
science and sexual development educational material.
Alcohol & Tobacco
Websites that promote or sell alcoholic beverages or tobacco
products.
Gambling
Websites that provide gambling odds and information or allow online
betting.
Intimate Apparel & Swimwear
Websites containing revealing images such as swimsuits and
modeling, but not nudity.
Intolerance & Hate
Websites encouraging bigotry or discrimination.
Pornography
Any website that contains sexually suggestive, explicit or erotic
content.
Tasteless & Offensive
Websites portraying horror or perverse content.
Violence & Terrorism
Websites encouraging, instructing, or portraying extreme violence to
people or property.
Weapons
Websites that contain information about making, buying, or obtaining
any sort of weapons.
Extremely Offensive
Websites containing content that is shocking, gory, perverse, or
horrific in nature.
Gambling Related
Websites providing information or promoting services, techniques or
accessories related to gambling.
Game/Cartoon Violence
Websites containing graphically violent animated content.
Historical Opinion
Websites dedicated to subjective analysis of historical events,
especially partisan or agenda-driven analysis.
Incidental Nudity
Websites which include nude images because they are part of a
broader category of art or education.
Nudity
Websites containing bare images of the human body which are not
suggestive or explicit.
Profanity
Websites which contain excessive use of profanity or obscenities.
Security
Websites that are security risks or sources of malware, or that allow users to circumvent policies.
Category
Criteria
Hacking
Websites that contain instructions and information for how to commit
fraud or steal information through computer security vulnerabilities.
Phishing & Fraud
Websites that are known to be distributed as links in phishing emails.
180
Proxies
Websites that enable users to hide their browsing destinations, IP
address, or username to avoid detection and bypass Web filters.
Spam
Websites delivering unwanted or unsolicited electronic messages.
Spyware
Websites that are accessed from spam message clicks, which
distribute programs to gather user information, or covertly send
information to third party websites.
Proxy Utilities
Websites providing users with resources to help them avoid detection
or bypass Web filters.
Information Security
Websites that provide information about protecting personal or
business data.
Malicious Sites
Websites that provide or display content which intends harm to users
or their computer systems.
Suspicious Sites
Suspect websites whose malicious intent cannot be confirmed.
Technology
Websites that allow users to access search engines, portals and various technologies.
Category
Criteria
Computing & Technology
Websites that provide technical support information, but not of a
security nature.
Content Server
Includes domains that host websites of other types and are often
sources of security threats.
Downloads
Websites that distribute copies of free and shared software.
Parked Sites
For sale or expired websites that display links or advertisements.
Visual Search
Websites that provide image searching and matching technology.
Search Engines & Portals
Websites that aggregate disparate information or allow users to
search across large amounts of data.
Software/Hardware
Websites that provide access to software or hardware technology.
Interactive Web Applications
Websites that provide access to groupware or interactive conference
rooms.
Online Services
Websites that provide access to Web-based services.
Online Storage
Websites that allow the uploading of files and backups for remote
data storage.
Remote Access
Websites that provide access to resources from a remote locations.
Resource Sharing
Websites that allow posting and sharing of resources and downloads
to a network of people.
Technical Information
Websites that provide information on technical details of
technologies.
Translators
Websites that provide translation services.
URL Redirectors
Websites that automatically forward the user from the requested URL
to another URL.
Related Articles
181
Creating Block and Accept Policies
BLOCK/ACCEPT Order of Precedence - Barracuda Web Filter
About the Barracuda Web Filter Hardware
en
In this article:
Front Panel of the Barracuda Web Filter
Barracuda Web Filter 210
Barracuda Web Filter 310 and 410
Barracuda Web Filter 610
Barracuda Web Filter 810 and 910
Barracuda Web Filter 1010
Back Panel of the Barracuda Web Filter
Barracuda Web Filter 210
Barracuda Web Filter 310 and 410
Barracuda Web Filter 610
Barracuda Web Filter 810 and 910
Barracuda Web Filter 1010
Front Panel of the Barracuda Web Filter
Figures 1-4 illustrate the front panels for each model.
Barracuda Web Filter 210
Figure 1: Barracuda Web Filter 210 Front Panel.
Note that the WAN and LAN ports are located on the back of the unit.
Barracuda Web Filter 310 and 410
Figure 2: Barracuda Web Filter 310 and 410 Front Panel as described in Table 1.
Table 1: Front Panel Descriptions for the Barracuda Web Filter models 210, 310 and 410.
Diagram Location
Component Name
182
Description
1
WAN port
Port for WAN Connection
2
LAN port
Port for LAN Connection
3
Spyware Activity
Blinks when the Barracuda Web Filter blocks
installed spyware from accessing external
sites
4
Spyware or Virus Downloads
Blinks when the Barracuda Web Filter blocks
a virus or spyware application from being
downloaded
5
Web Activity
Blinks when the Barracuda Web Filter
processes traffic
6
Hard Disk
Blinks during disk activity
7
System Power
Displays a solid green light when the system
is powered on
8
Reset Button
Resets the Barracuda Web Filter
9
Power Button
Powers the Barracuda Web Filter on or off
Barracuda Web Filter 610
Figure 3: Barracuda Web Filter 610 Front Panel as described in Table 2.
Table 2: Barracuda Web Filter 610 Front Panel Descriptions.
Diagram Location
Component Name
Description
1
Hard Disk Drive #1
Location of #1 disk drive
2
Hard Disk Drive Inactivity
Displays the hard disk is inactive
3
Hard Disk Drive Activity
Displays the hard disk drive is active
4
Hard Disk Drive #2
Location of #2 hard disk drive
5
Hard Disk Drive Inactivity
Displays the hard disk is inactive
6
Hard Disk Drive Activity
Displays the hard disk drive is active
7
Spyware Activity
Displays spyware activity
8
Spyware or Virus Downloads
Displays spyware or virus download activity
9
Internet Activity
Displays normal Internet activity
10
WAN port
Port for WAN connection
11
Hard Disk
Displays hard disk activity
12
System Power
Displays system power
12
LAN port
Port for LAN connection
183
14
Reset button
Resets the Barracuda Web Filter
15
Power button
Powers the Barracuda Web Filter on or off
Barracuda Web Filter 810 and 910
Figure 4: Barracuda Web Filter 810 and 910 Front Panel as described in Table 3.
Table 3: Barracuda Web Filter 810 and 910 Front Panel Descriptions.
Diagram Location
Component Name
Description
1
Hard disk drive locks
Location of #1 disk drive
2
Hard Disk Drive #2
Location of #2 disk drive
3
Hard Disk Drive #3
Location of #3 disk drive
4
Hard Disk Drive #4
Location of #4 disk drive
5
Hard Disk Drive #5
Location of #5 disk drive
6
Hard Disk Drive #6
Location of #6 disk drive
7
Hard Disk Drive #7
Location of #7 disk drive
8
Hard Disk Drive #8
Location of #8 disk drive
9
Reset button
Resets the Barracuda Web Filter
10
WAN port
Port for WAN connection
11
LAN port
Port for LAN connection
12
Spyware Activity
Displays spyware activity
13
Spyware or Virus Downloads
Displays spyware or virus download activity
14
Web activity
Displays normal web traffic
15
Hard Disk
Displays hard disk activity
16
System Power
Displays system power
17
Power button
Powers the Barracuda Web Filter on or off
Barracuda Web Filter 1010
Figure 5: Barracuda Web Filter 1010 Front Panel as described in Table 4.
184
Table 4: Barracuda Web Filter 1010 Front Panel Description.
Diagram Location
Component Name
Description
1
Hard disk drive locks
Location of #1 disk drive
2
Hard Disk Drive #2
Location of #2 disk drive
3
Hard Disk Drive #3
Location of #3 disk drive
4
Hard Disk Drive #4
Location of #4 disk drive
5
Hard Disk Drive #5
Location of #5 disk drive
6
Hard Disk Drive #6
Location of #6 disk drive
7
Hard Disk Drive #7
Location of #7 disk drive
8
Hard Disk Drive #8
Location of #8 disk drive
9
Reset button
Resets the Barracuda Web Filter
10
Spyware or Virus Downloads
Displays spyware or virus download activity
11
Spyware Activity
Displays spyware activity
12
Web activity
Displays normal web traffic
13
Hard Disk
Displays hard disk activity
14
System Power
Displays system power
15
Power button
Powers the Barracuda Web Filter on or off
Back Panel of the Barracuda Web Filter
Figure 6, Figure 7, Figure 8 and and Figure 9 illustrate the back panels for each model.
Barracuda Web Filter 210
Figure 6: Barracuda Web Filter 210 Back Panel as described in Table 5.
185
Table 5: Barracuda Web Filter 210 Back Component Descriptions.
Diagram Location
Component Name
Description
1
Keyboard port
Connection for the keyboard
2
USB ports (2)
Connection for USB devices
3
Serial port
Connection for the serial console cable
4
Monitor port
Connection for the monitor
5
USB ports (4)
Connection for USB devices
6
Auxiliary port
Web interface management
7
Not Used
Not used
8
Power
Connection for the AC power cord, standard
power supply
9
WAN port
Port for WAN connection
10
LAN port
Port for LAN connection
Barracuda Web Filter 310 and 410
Figure 7: Barracuda Web Filter 310 and 410 Back Panel as described in Table 6.
Table 6: Barracuda Web Filter 310 and 410 Back Component Descriptions.
Diagram Location
Component Name
Description
1
Power Supply
Connection for the AC power cord, standard
2
Fan
Location of the fan
3
Mouse port
Connection for the mouse
4
Keyboard port
Connection for the keyboard
5
Serial port
Connection for the serial console cable
186
6
Parallel Port
Connection for the parallel cable
7
Monitor Port
Connection for the monitor
8
USB ports (4)
Connection for USB devices
9
Auxiliary Port
Web interface management
Barracuda Web Filter 610
Figure 8: Barracuda Web Filter back panel as described in Table 7.
Table 7: Barracuda Web Filter 610 Back Component Descriptions.
Diagram Location
Component Name
Description
1
Fan
Location of the fan
2
Power Supply
Connection for the AC power cord, standard
power supply
3
Mouse port
Connection for the mouse
4
Keyboard port
Connection for the keyboard
5
USB ports (2)
Connection for USB devices
6
Serial port
Connection for the serial console cable
6
Parallel Port
Connection for the parallel cable
7
Monitor Port
Connection for the monitor
8
Auxiliary Port
Web interface management
Barracuda Web Filter 810 and 910
Figure 9: Barracuda Web Filter 810 and 910 Back Panel as described in Table 8.
Table 8: Barracuda Web Filter 810 and 910 Back Component Descriptions.
Diagram Location
Component Name
Description
1
Power Supplies (2)
Connection for the AC power cord, standard
power supply
2
Mouse port
Connection for the mouse
187
3
Keyboard port
Connection for the keyboard
4
Not used
Not used
5
USB ports (2)
Connection for USB devices
6
Serial port
Connection for the serial console cable
7
Monitor Port
Connection for the monitor
8
Auxiliary Port
Web interface management
9
Not used
Not used
10
Not used
Not used
Barracuda Web Filter 1010
Figure 10: Barracuda Web Filter 1010 Back Panel as described in Table 9.
Table 9: Barracuda Web Filter 1010 Back Component Descriptions.
Diagram Location
Component Name
Description
1
Hot Swappable Power Supplies (2)
Connection for the AC power cord, standard
power supply
2
Mouse port
Connection for the mouse
3
Keyboard port
Connection for the keyboard
4
Not used
Not used
5
USB ports (2)
Connection for USB devices
6
Serial port
Connection for the serial console cable
7
Monitor Port
Connection for the monitor
8
Auxiliary Port
Web interface management
9
Not Used
Not Used
10
LAN2 / WAN2 Ports
Ports for LAN2, WAN2 connections
11
LAN1 / WAN1 Ports
Ports for LAN1, WAN1 connections
Related Articles
Hardware Compliance
Hardware Compliance
188
en
en
This section contains compliance information for the appliance.
Notice for the USA
Compliance Information Statement (Declaration of Conformity Procedure) DoC FCC Part 15: This device complies with part 15 of the FCC Rules.
Operation is subject to the following conditions:
1. This device may not cause harmful interference, and
2. This device must accept any interference received including interference that may cause undesired operation. If this equipment does
cause harmful interference to radio or television reception, which can be determined by turning the equipment off and on, the user in
encouraged to try one or more of the following measures:
Reorient or relocate the receiving antenna.
Increase the separation between the equipment and the receiver.
Plug the equipment into an outlet on a circuit different from that of the receiver.
Consult the dealer on an experienced radio/ television technician for help.
Notice for Canada
This apparatus complies with the Class B limits for radio interference as specified in the Canadian Department of Communication Radio
Interference Regulations.
Notice for Europe (CE Mark)
This product is in conformity with the Council Directive 89/336/EEC, 92/31/EEC (EMC).
Power Requirements
AC input voltage 100-240 volts; frequency 50/60 Hz.
Limited Warranty and License
en
Limited Warranty
Barracuda Networks, Inc., or the Barracuda Networks, Inc. subsidiary or authorized Distributor selling the Barracuda Networks product, if sale is
not directly by Barracuda Networks, Inc., (“Barracuda Networks”) warrants that commencing from the date of delivery to Customer (but in case of
resale by a Barracuda Networks reseller, commencing not more than sixty (60) days after original shipment by Barracuda Networks, Inc.), and
continuing for a period of one (1) year: (a) its products (excluding any software) will be free from material defects in materials and workmanship
under normal use; and (b) the software provided in connection with its products, including any software contained or embedded in such products
will substantially conform to Barracuda Networks published specifications in effect as of the date of manufacture. Except for the foregoing, the
software is provided as is. In no event does Barracuda Networks warrant that the software is error free or that Customer will be able to operate
the software without problems or interruptions. In addition, due to the continual development of new techniques for intruding upon and attacking
189
networks, Barracuda Networks does not warrant that the software or any equipment, system or network on which the software is used will be free
of vulnerability to intrusion or attack. The limited warranty extends only to you the original buyer of the Barracuda Networks product and is
non-transferable.
Exclusive Remedy
Your sole and exclusive remedy and the entire liability of Barracuda Networks under this limited warranty shall be, at Barracuda Networks or its
service centers option and expense, the repair, replacement or refund of the purchase price of any products sold which do not comply with this
warranty. Hardware replaced under the terms of this limited warranty may be refurbished or new equipment substituted at Barracuda Networks
option. Barracuda Networks obligations hereunder are conditioned upon the return of affected articles in accordance with Barracuda Networks
then-current Return Material Authorization (“RMA”) procedures. All parts will be new or refurbished, at Barracuda Networks discretion, and shall
be furnished on an exchange basis. All parts removed for replacement will become the property of the Barracuda Networks. In connection with
warranty services hereunder, Barracuda Networks may at its discretion modify the hardware of the product at no cost to you to improve its
reliability or performance. The warranty period is not extended if Barracuda Networks repairs or replaces a warranted product or any parts.
Barracuda Networks may change the availability of limited warranties, at its discretion, but any changes will not be retroactive. IN NO EVENT
SHALL BARRACUDA NETWORKS LIABILITY EXCEED THE PRICE PAID FOR THE PRODUCT FROM DIRECT, INDIRECT, SPECIAL,
INCIDENTAL, OR CONSEQUENTIAL DAMAGES RESULTING FROM THE USE OF THE PRODUCT, ITS ACCOMPANYING SOFTWARE, OR
ITS DOCUMENTATION.
Exclusions and Restrictions
This limited warranty does not apply to Barracuda Networks products that are or have been (a) marked or identified as “sample” or “beta,” (b)
loaned or provided to you at no cost, (c) sold “as is,” (d) repaired, altered or modified except by Barracuda Networks, (e) not installed, operated or
maintained in accordance with instructions supplied by Barracuda Networks, or (f) subjected to abnormal physical or electrical stress, misuse,
negligence or to an accident.
EXCEPT FOR THE ABOVE WARRANTY, BARRACUDA NETWORKS MAKES NO OTHER WARRANTY, EXPRESS, IMPLIED OR
STATUTORY, WITH RESPECT TO BARRACUDA NETWORKS PRODUCTS, INCLUDING WITHOUT LIMITATION ANY IMPLIED WARRANTY
OF TITLE, AVAILABILITY, RELIABILITY, USEFULNESS, MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE,
NONINFRINGEMENT, OR ARISING FROM COURSE OF PERFORMANCE, DEALING, USAGE OR TRADE. EXCEPT FOR THE ABOVE
WARRANTY, BARRACUDA NETWORKS PRODUCTS AND THE SOFTWARE IS PROVIDED “AS IS” AND BARRACUDA NETWORKS DOES
NOT WARRANT THAT ITS PRODUCTS WILL MEET YOUR REQUIREMENTS OR BE UNINTERRUPTED, TIMELY, AVAILABLE, SECURE OR
ERROR-FREE, OR THAT ANY ERRORS IN ITS PRODUCTS OR THE SOFTWARE WILL BE CORRECTED. FURTHERMORE, BARRACUDA
NETWORKS DOES NOT WARRANT THAT BARRACUDA NETWORKS PRODUCTS, THE SOFTWARE OR ANY EQUIPMENT, SYSTEM OR
NETWORK ON WHICH BARRACUDA NETWORKS PRODUCTS WILL BE USED WILL BE FREE OF VULNERABILITY TO INTRUSION OR
ATTACK.
Software License
PLEASE READ THIS SOFTWARE LICENSE AGREEMENT (“AGREEMENT”) CAREFULLY BEFORE USING THE BARRACUDA SOFTWARE.
BY USING THE BARRACUDA SOFTWARE YOU ARE AGREEING TO BE BOUND BY THE TERMS OF THIS LICENSE. IF YOU DO NOT
AGREE TO THE TERMS OF THIS LICENSE DO NOT USE THE SOFTWARE. IF YOU DO NOT AGREE TO THE TERMS OF THIS LICENSE
YOU MAY RETURN THE SOFTWARE OR HARDWARE CONTAINING THE SOFTWARE FOR A FULL REFUND TO YOUR PLACE OF
PURCHASE.
1. The software, documentation, whether on disk, in read only memory, or on any other media or in any other form (collectively “Barracuda
Software”) is licensed, not sold, to you by Barracuda Networks, Inc. (“Barracuda”) for use only under the terms of this License and Barracuda
reserves all rights not expressly granted to you. The rights granted are limited to Barracuda's intellectual property rights in the Barracuda Software
and do not include any other patent or intellectual property rights. You own the media on which the Barracuda Software is recorded but Barracuda
retains ownership of the Barracuda Software itself.
2. Permitted License Uses and Restrictions. This License allows you to use the Software only on the single Barracuda labeled hardware device
on which the software was delivered. You may not make copies of the Software and you may not make the Software available over a network
where it could be utilized by multiple devices or copied. You may not make a backup copy of the Software. You may not modify or create
derivative works of the Software except as provided by the Open Source Licenses included below. The BARRACUDA SOFTWARE IS NOT
INTENDED FOR USE IN THE OPERATION OF NUCLEAR FACILITIES, AIRCRAFT NAVIGATION OR COMMUNICATION SYSTEMS, LIFE
SUPPORT MACHINES, OR OTHER EQUIPEMENT IN WHICH FAILURE COULD LEAD TO DEATH, PERSONAL INJURY, OR
ENVIRONMENTAL DAMAGE.
3. You may not transfer, rent, lease, lend, or sublicense the Barracuda Software.
4. This License is effective until terminated. This License is automatically terminated without notice if you fail to comply with any term of the
License. Upon termination you must destroy or return all copies of the Barracuda Software.
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5. YOU EXPRESSLY ACKNOWLEDGE AND AGREE THAT THE USE OF THE BARRACUDA SOFTWARE IS AT YOUR OWN RISK AND THAT
THE ENTIRE RISK AS TO SATISFACTION, QUALITY, PERFORMANCE, AND ACCURACY IS WITH YOU. THE BARRACUDA SOFTWARE IS
PROVIDED “AS IS” WITH ALL FAULTS AND WITHOUT WARRANTY OF ANY KIND, AND BARRACUDA HEREBY DISCLAIMS ALL
WARRANTIES AND CONDITIONS WITH RESPECT TO THE BARRACUDA SOFTWARE, EITHER EXPRESSED OR IMPLIED OR
STATUTORY, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES AND/OR CONDITIONS OF MERCHANTIBILITY, OF
SATISFACTORY QUALITY, OF FITNESS FOR ANY APPLICATION, OF ACCURACY, AND OF NON-INFRINGEMENT OF THIRD PARTY
RIGHTS. BARRACUDA DOES NOT WARRANT THE CONTINUED OPERATION OF THE SOFTWARE, THAT THE PERFORMANCE WILL
MEET YOUR EXPECTATIONS, THAT THE FUNCTIONS WILL MEET YOUR REQUIREMENTS, THAT THE OPERATION WILL BE ERROR
FREE OR CONTINUOUS, OR THAT DEFECTS WILL BE CORRECTED. NO ORAL OR WRITTEN INFORMATION GIVEN BY BARRACUDA OR
AUTHORIZED BARRACUDA REPRESENTATIVE SHALL CREATE A WARRANTY. SHOULD THE BARRACUDA SOFTWARE PROVE
DEFECTIVE, YOU ASSUME THE ENTIRE COST OF ALL NECESSARY SERVICING, REPAIR, OR CORRECTION.
6. License. YOU EXPRESSLY ACKNOWLEDGE AND AGREE THAT YOU WILL PROVIDE AN UNLIMITED ZERO COST LICENSE TO
BARRACUDA FOR ANY PATENTS OR OTHER INTELLECTUAL PROPERTY RIGHTS UTILIZED IN THE BARRACUDA SOFTWARE WHICH
YOU EITHER OWN OR CONTROL.
7. Limitation of Liability. TO THE EXTENT NOT PROHIBITED BY LAW, IN NO EVENT SHALL BARRACUDA BE LIABLE FOR PERSONAL
INJURY OR ANY INCIDENTAL SPECIAL, INDIRECT, OR CONSEQUENTIAL DAMAGES WHATSOEVER, INCLUDING, WITHOUT
LIMITATION, DAMAGES FOR LOSS OF PROFITS, LOSS OF DATA, BUSINESS INTERRUPTION, OR ANY OTHER COMMERCIAL DAMAGES
OR LOSSES, ARISING OUT OF OR RELATED TO YOUR ABILITY TO USE OR INABILITY TO USE THE BARRACUDA SOFTWARE
HOWEVER CAUSED, REGARDLESS OF THE THEORY OF LIABILITY AND EVEN IF BARRACUDA HAS BEEN ADVISED OF THE
POSSIBILITY OF DAMAGES. In no event shall Barracuda's total liability to you for all damages exceed the amount of one hundred dollars.
8. Export Control. You may not use or otherwise export or re-export Barracuda Software except as authorized by the United States law and the
laws of the jurisdiction where the Barracuda Software was obtained.
Energize Update Software License
PLEASE READ THIS ENERGIZE UPDATE SOFTWARE LICENSE CAREFULLY BEFORE DOWNLOADING, INSTALLING OR USING
BARRACUDA NETWORKS OR BARRACUDA NETWORKS-SUPPLIED ENERGIZE UPDATE SOFTWARE.
BY DOWNLOADING OR INSTALLING THE ENERGIZE UPDATE SOFTWARE, OR USING THE EQUIPMENT THAT CONTAINS THIS
SOFTWARE, YOU ARE CONSENTING TO BE BOUND BY THIS LICENSE. IF YOU DO NOT AGREE TO ALL OF THE TERMS OF THIS
LICENSE, THEN (A) DO NOT DOWNLOAD, INSTALL OR USE THE SOFTWARE, AND (B) YOU MAY RETURN THE SOFTWARE FOR A FULL
REFUND, OR, IF THE SOFTWARE IS SUPPLIED AS PART OF ANOTHER PRODUCT, YOU MAY RETURN THE ENTIRE PRODUCT FOR A
FULL REFUND. YOUR RIGHT TO RETURN AND REFUND EXPIRES 30 DAYS AFTER PURCHASE FROM BARRACUDA NETWORKS OR AN
AUTHORIZED BARRACUDA NETWORKS RESELLER, AND APPLIES ONLY IF YOU ARE THE ORIGINAL PURCHASER.
The following terms govern your use of the Energize Update Software except to the extent a particular program (a) is the subject of a separate
written agreement with Barracuda Networks or (b) includes a separate “click-on” license agreement as part of the installation and/or download
process. To the extent of a conflict between the provisions of the foregoing documents, the order of precedence shall be (1) the written
agreement, (2) the click-on agreement, and (3) this Energize Update Software License.
License. Subject to the terms and conditions of and except as otherwise provided in this Agreement, Barracuda Networks, Inc., or a Barracuda
Networks, Inc. subsidiary (collectively “Barracuda Networks”), grants to the end-user (“Customer”) a nonexclusive and nontransferable license to
use the Barracuda Networks Energize Update program modules and data files for which Customer has paid the required license fees (the
“Energize Update Software”). In addition, the foregoing license shall also be subject to the following limitations, as applicable:
Unless otherwise expressly provided in the documentation, Customer shall use the Energize Update Software solely as embedded in, for
execution on, or (where the applicable documentation permits installation on non-Barracuda Networks equipment) for communication with
Barracuda Networks equipment owned or leased by Customer; Customer's use of the Energize Update Software shall be limited to use on a
single hardware chassis, on a single central processing unit, as applicable, or use on such greater number of chassis or central processing units
as Customer may have paid Barracuda Networks the required license fee; and Customer's use of the Energize Update Software shall also be
limited, as applicable and set forth in Customer's purchase order or in Barracuda Networks' product catalog, user documentation, or web site, to a
maximum number of (a) seats (i.e. users with access to the installed Energize Update Software), (b) concurrent users, sessions, ports, and/or
issued and outstanding IP addresses, and/or (c) central processing unit cycles or instructions per second. Customer's use of the Energize Update
Software shall also be limited by any other restrictions set forth in Customer's purchase order or in Barracuda Networks' product catalog, user
documentation or web site for the Energize Update Software.
General Limitations. Except as otherwise expressly provided under this Agreement, Customer shall have no right, and Customer specifically
agrees not to:
i. transfer, assign or sublicense its license rights to any other person, or use the Energize Update Software on
unauthorized or secondhand Barracuda Networks equipment, and any such attempted transfer, assignment or
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i.
sublicense shall be void;
ii. make error corrections to or otherwise modify or adapt the Energize Update Software or create derivative works based
upon the Energize Update Software, or to permit third parties to do the same; or
iii. decompile, decrypt, reverse engineer, disassemble or otherwise reduce the Energize Update Software to
human-readable form to gain access to trade secrets or confidential information in the Energize Update Software.
Upgrades and Additional Copies. For purposes of this Agreement, “Energize Update Software” shall include (and the terms and conditions of this
Agreement shall apply to) any Energize Update upgrades, updates, bug fixes or modified versions (collectively, “Upgrades”) or backup copies of
the Energize Update Software licensed or provided to Customer by Barracuda Networks or an authorized distributor/reseller for which Customer
has paid the applicable license fees. NOTWITHSTANDING ANY OTHER PROVISION OF THIS AGREEMENT: (1) CUSTOMER HAS NO
LICENSE OR RIGHT TO USE ANY SUCH ADDITIONAL COPIES OR UPGRADES UNLESS CUSTOMER, AT THE TIME OF ACQUIRING
SUCH COPY OR UPGRADE, ALREADY HOLDS A VALID LICENSE TO THE ORIGINAL ENERGIZE UPDATE SOFTWARE AND HAS PAID
THE APPLICABLE FEE FOR THE UPGRADE; (2) USE OF UPGRADES IS LIMITED TO BARRACUDA NETWORKS EQUIPMENT FOR WHICH
CUSTOMER IS THE ORIGINAL END USER PURCHASER OR LESSEE OR WHO OTHERWISE HOLDS A VALID LICENSE TO USE THE
ENERGIZE UPDATE SOFTWARE WHICH IS BEING UPGRADED; AND (3) USE OF ADDITIONAL COPIES IS LIMITED TO BACKUP
PURPOSES ONLY.
Energize Update Changes. Barracuda Networks reserves the right at any time not to release or to discontinue release of any Energize Update
Software and to alter prices, features, specifications, capabilities, functions, licensing terms, release dates, general availability or other
characteristics of any future releases of the Energize Update Software.
Proprietary Notices. Customer agrees to maintain and reproduce all copyright and other proprietary notices on all copies, in any form, of the
Energize Update Software in the same form and manner that such copyright and other proprietary notices are included on the Energize Update
Software. Except as expressly authorized in this Agreement, Customer shall not make any copies or duplicates of any Energize Update Software
without the prior written permission of Barracuda Networks. Customer may make such backup copies of the Energize Update Software as may be
necessary for Customer's lawful use, provided Customer affixes to such copies all copyright, confidentiality, and proprietary notices that appear on
the original.
Protection of Information. Customer agrees that aspects of the Energize Update Software and associated documentation, including the specific
design and structure of individual programs, constitute trade secrets and/or copyrighted material of Barracuda Networks. Customer shall not
disclose, provide, or otherwise make available such trade secrets or copyrighted material in any form to any third party without the prior written
consent of Barracuda Networks. Customer shall implement reasonable security measures to protect and maintain the confidentiality of such trade
secrets and copyrighted material. Title to Energize Update Software and documentation shall remain solely with Barracuda Networks.
Indemnity. Customer agrees to indemnify, hold harmless and defend Barracuda Networks and its affiliates, subsidiaries, officers, directors,
employees and agents at Customers expense, against any and all third-party claims, actions, proceedings, and suits and all related liabilities,
damages, settlements, penalties, fines, costs and expenses (including, without limitation, reasonable attorneys fees and other dispute resolution
expenses) incurred by Barracuda Networks arising out of or relating to Customers (a) violation or breach of any term of this Agreement or any
policy or guidelines referenced herein, or (b) use or misuse of the Barracuda Networks Energize Update Software.
Term and Termination. This License is effective upon date of delivery to Customer of the initial Energize Update Software (but in case of resale by
a Barracuda Networks distributor or reseller, commencing not more than sixty (60) days after original Energize Update Software purchase from
Barracuda Networks) and continues for the period for which Customer has paid the required license fees. Customer may terminate this License at
any time by notifying Barracuda Networks and ceasing all use of the Energize Update Software. By terminating this License, Customer forfeits
any refund of license fees paid and is responsible for paying any and all outstanding invoices. Customer's rights under this License will terminate
immediately without notice from Barracuda Networks if Customer fails to comply with any provision of this License. Upon termination, Customer
must cease use of all copies of Energize Update Software in its possession or control.
Export. Software, including technical data, may be subject to U.S. export control laws, including the U.S. Export Administration Act and its
associated regulations, and may be subject to export or import regulations in other countries. Customer agrees to comply strictly with all such
regulations and acknowledges that it has the responsibility to obtain licenses to export, re-export, or import Energize Update Software.
Restricted Rights. Barracuda Networks' commercial software and commercial computer software documentation is provided to United States
Government agencies in accordance with the terms of this Agreement, and per subparagraph “(c)” of the “Commercial Computer Software Restricted Rights” clause at FAR 52.227-19 (June 1987). For DOD agencies, the restrictions set forth in the “Technical Data-Commercial Items”
clause at DFARS 252.227-7015 (Nov 1995) shall also apply.
No Warranty. The Energize Update Software is provided AS IS. Customer's sole and exclusive remedy and the entire liability of Barracuda
Networks under this Energize Update Software License Agreement will be, at Barracuda Networks option, repair, replacement, or refund of the
Energize Update Software.
Renewal. At the end of the Energize Update Service Period, Customer may have the option to renew the Energize Update Service at the current
list price, provided such Energize Update Service is available. All initial subscriptions commence at the time of sale of the unit and all renewals
commence at the expiration of the previous valid subscription.
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In no event does Barracuda Networks warrant that the Energize Update Software is error free or that Customer will be able to operate the
Energize Update Software without problems or interruptions. In addition, due to the continual development of new techniques for intruding upon
and attacking networks, Barracuda Networks does not warrant that the Energize Update Software or any equipment, system or network on which
the Energize Update Software is used will be free of vulnerability to intrusion or attack.
DISCLAIMER OF WARRANTY. ALL EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS, AND WARRANTIES INCLUDING,
WITHOUT LIMITATION, ANY IMPLIED WARRANTY OR CONDITION OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE,
NONINFRINGEMENT, SATISFACTORY QUALITY OR ARISING FROM A COURSE OF DEALING, LAW, USAGE, OR TRADE PRACTICE, ARE
HEREBY EXCLUDED TO THE EXTENT ALLOWED BY APPLICABLE LAW. TO THE EXTENT AN IMPLIED WARRANTY CANNOT BE
EXCLUDED, SUCH WARRANTY IS LIMITED IN DURATION TO THE WARRANTY PERIOD. BECAUSE SOME STATES OR JURISDICTIONS
DO NOT ALLOW LIMITATIONS ON HOW LONG AN IMPLIED WARRANTY LASTS, THE ABOVE LIMITATION MAY NOT APPLY TO YOU.
THIS WARRANTY GIVES YOU SPECIFIC LEGAL RIGHTS, AND YOU MAY ALSO HAVE OTHER RIGHTS WHICH VARY FROM
JURISDICTION TO JURISDICTION.
General Terms Applicable to the Energize Update Software License Disclaimer of Liabilities. IN NO EVENT WILL BARRACUDA NETWORKS BE
LIABLE FOR ANY LOST REVENUE, PROFIT, OR DATA, OR FOR SPECIAL, INDIRECT, CONSEQUENTIAL, INCIDENTAL, OR PUNITIVE
DAMAGES HOWEVER CAUSED AND REGARDLESS OF THE THEORY OF LIABILITY ARISING OUT OF THE USE OF OR INABILITY TO
USE THE ENERGIZE UPDATE SOFTWARE EVEN IF BARRACUDA NETWORKS OR ITS SUPPLIERS HAVE BEEN ADVISED OF THE
POSSIBILITY OF SUCH DAMAGES. In no event shall Barracuda Networks' liability to Customer, whether in contract, tort (including negligence),
or otherwise, exceed the price paid by Customer. BECAUSE SOME STATES OR JURISDICTIONS DO NOT ALLOW LIMITATION OR
EXCLUSION OF CONSEQUENTIAL OR INCIDENTAL DAMAGES, THE ABOVE LIMITATION MAY NOT APPLY TO YOU.
This Energize Update Software License shall be governed by and construed in accordance with the laws of the State of California, without
reference to principles of conflict of laws, provided that for Customers located in a member state of the European Union, Norway or Switzerland,
English law shall apply. The United Nations Convention on the International Sale of Goods shall not apply. If any portion hereof is found to be void
or unenforceable, the remaining provisions of the Energize Update Software License shall remain in full force and effect. Except as expressly
provided herein, the Energize Update Software License constitutes the entire agreement between the parties with respect to the license of the
Energize Update Software and supersedes any conflicting or additional terms contained in the purchase order.
Open Source Licensing
Barracuda products may include programs that are covered by the GNU General Public License (GPL) or other “open source” license
agreements. The GNU license is re-printed below for you reference. These programs are copyrighted by their authors or other parties, and the
authors and copyright holders disclaim any warranty for such programs. Other programs are copyright by Barracuda Networks.
GNU GENERAL PUBLIC LICENSE, (GPL) Version 2, June 1991
Copyright (C) 1989, 1991 Free Software Foundation, Inc. 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
Everyone is permitted to copy and distribute verbatim copies of this license document, but changing it is not allowed.
Preamble
The licenses for most software are designed to take away your freedom to share and change it. By contrast, the GNU General Public
License is intended to guarantee your freedom to share and change free software--to make sure the software is free for all its users. This General
Public License applies to most of the Free Software Foundation's software and to any other program whose authors commit to using it. (Some
other Free Software Foundation software is covered by the GNU Library General Public License instead.) You can apply it to your programs, too.
When we speak of free software, we are referring to freedom, not price. Our General Public Licenses are designed to make sure that you have
the freedom to distribute copies of free software (and charge for this service if you wish), that you receive source code or can get it if you want it,
that you can change the software or use pieces of it in new free programs; and that you know you can do these things.
To protect your rights, we need to make restrictions that forbid anyone to deny you these rights or to ask you to surrender the rights. These
restrictions translate to certain responsibilities for you if you distribute copies of the software, or if you modify it.
For example, if you distribute copies of such a program, whethergratis or for a fee, you must give the recipients all the rights that you have. You
must make sure that they, too, receive or can get the source code. And you must show them these terms so they know their rights.
We protect your rights with two steps: (1) copyright the software, and (2) offer you this license which gives you legal permission to copy, distribute
and/or modify the software.
Also, for each author's protection and ours, we want to make certain that everyone understands that there is no warranty for this free software. If
the software is modified by someone else and passed on, we want its recipients to know that what they have is not the original, so that any
problems introduced by others will not reflect on the original authors' reputations.
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Finally, any free program is threatened constantly by software patents. We wish to avoid the danger that redistributors of a free program will
individually obtain patent licenses, in effect making the program proprietary. To prevent this, we have made it clear that any patent must be
licensed for everyone's free use or not licensed at all.
The precise terms and conditions for copying, distribution and modification follow.
GNU GENERAL PUBLIC LICENSE TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND MODIFICATION
0. This License applies to any program or other work which contains a notice placed by the copyright holder saying it may be distributed under the
terms of this General Public License. The "Program", below, refers to any such program or work, and a "work based on the Program" means
either the Program or any derivative work under copyright law: that is to say, a work containing the Program or a portion of it, either verbatim or
with modifications and/or translated into another language. (Hereinafter, translation is included without limitation in the term "modification".) Each
licensee is addressed as "you".
Activities other than copying, distribution and modification are not covered by this License; they are outside its scope. The act of running the
Program is not restricted, and the output from the Program is covered only if its contents constitute a work based on the Program (independent of
having been made by running the Program). Whether that is true depends on what the Program does.
1. You may copy and distribute verbatim copies of the Program's source code as you receive it, in any medium, provided that you conspicuously
and appropriately publish on each copy an appropriate copyright notice and disclaimer of warranty; keep intact all the notices that refer to this
License and to the absence of any warranty; and give any other recipients of the Program a copy of this License along with the Program.
You may charge a fee for the physical act of transferring a copy, and you may at your option offer warranty protection in exchange for a fee.
2. You may modify your copy or copies of the Program or any portion of it, thus forming a work based on the Program, and copy and distribute
such modifications or work under the terms of Section 1 above, provided that you also meet all of these conditions:
a) You must cause the modified files to carry prominent notices stating that you changed the files and the date of any change.
b) You must cause any work that you distribute or publish, that in whole or in part contains or is derived from the Program or any part
thereof, to be licensed as a whole at no charge to all third parties under the terms of this License.
c) If the modified program normally reads commands interactively when run, you must cause it, when started running for such interactive
use in the most ordinary way, to print or display an announcement including an appropriate copyright notice and a notice that there is no
warranty (or else, saying that you provide a warranty) and that users may redistribute the program under these conditions, and telling the
user how to view a copy of this License. (Exception: if the Program itself is interactive but does not normally print such an announcement,
your work based on the Program is not required to print an announcement.)
These requirements apply to the modified work as a whole. If identifiable sections of that work are not derived from the Program, and can be
reasonably considered independent and separate works in themselves, then this License, and its terms, do not apply to those sections when you
distribute them as separate works. But when you distribute the same sections as part of a whole which is a work based on the Program, the
distribution of the whole must be on the terms of this License, whose permissions for other licensees extend to the entire whole, and thus to each
and every part regardless of who wrote it.
Thus, it is not the intent of this section to claim rights or contest your rights to work written entirely by you; rather, the intent is to exercise the right
to control the distribution of derivative or collective works based on the Program.
In addition, mere aggregation of another work not based on the Program with the Program (or with a work based on the Program) on a volume of
a storage or distribution medium does not bring the other work under the scope of this License.
3. You may copy and distribute the Program (or a work based on it, under Section 2) in object code or executable form under the terms of
Sections 1 and 2 above provided that you also do one of the following:
a) Accompany it with the complete corresponding machine-readable source code, which must be distributed under the terms of Sections 1
and 2 above on a medium customarily used for software interchange; or,
b) Accompany it with a written offer, valid for at least three years, to give any third party, for a charge no more than your cost of physically
performing source distribution, a complete machine-readable copy of the corresponding source code, to be distributed under the terms of
Sections 1 and 2 above on a medium customarily used for software interchange; or,
c) Accompany it with the information you received as to the offer to distribute corresponding source code. (This alternative is allowed only
for noncommercial distribution and only if you received the program in object code or executable form with such an offer, in accord with
Subsection b above.)
The source code for a work means the preferred form of the work for making modifications to it. For an executable work, complete source code
means all the source code for all modules it contains, plus any associated interface definition files, plus the scripts used to control compilation and
installation of the executable. However, as a special exception, the source code distributed need not include anything that is normally distributed
194
(in either source or binary form) with the major components (compiler, kernel, and so on) of the operating system on which the executable runs,
unless that component itself accompanies the executable.
If distribution of executable or object code is made by offering access to copy from a designated place, then offering equivalent access to copy the
source code from the same place counts as distribution of the source code, even though third parties are not compelled to copy the source along
with the object code.
4. You may not copy, modify, sublicense, or distribute the Program except as expressly provided under this License. Any attempt otherwise to
copy, modify, sublicense or distribute the Program is void, and will automatically terminate your rights under this License. However, parties who
have received copies, or rights, from you under this License will not have their licenses terminated so long as such parties remain in full
compliance.
5. You are not required to accept this License, since you have not signed it. However, nothing else grants you permission to modify or distribute
the Program or its derivative works. These actions are prohibited by law if you do not accept this License. Therefore, by modifying or distributing
the Program (or any work based on the Program), you indicate your acceptance of this License to do so, and all its terms and conditions for
copying, distributing or modifying the Program or works based on it.
6. Each time you redistribute the Program (or any work based on the Program), the recipient automatically receives a license from the original
licensor to copy, distribute or modify the Program subject to these terms and conditions. You may not impose any further restrictions on the
recipients' exercise of the rights granted herein. You are not responsible for enforcing compliance by third parties to this License.
7. If, as a consequence of a court judgment or allegation of patent infringement or for any other reason (not limited to patent issues), conditions
are imposed on you (whether by court order, agreement or otherwise) that contradict the conditions of this License, they do not excuse you from
the conditions of this License. If you cannot distribute so as to satisfy simultaneously your obligations under this License and any other pertinent
obligations, then as a consequence you may not distribute the Program at all. For example, if a patent license would not permit royalty-free
redistribution of the Program by all those who receive copies directly or indirectly through you, then the only way you could satisfy both it and this
License would be to refrain entirely from distribution of the Program.
If any portion of this section is held invalid or unenforceable under any particular circumstance, the balance of the section is intended to apply and
the section as a whole is intended to apply in other circumstances.
It is not the purpose of this section to induce you to infringe any patents or other property right claims or to contest validity of any such claims; this
section has the sole purpose of protecting the integrity of the free software distribution system, which is implemented by public license practices.
Many people have made generous contributions to the wide range of software distributed through that system in reliance on consistent application
of that system; it is up to the author/donor to decide if he or she is willing to distribute software through any other system and a licensee cannot
impose that choice.
This section is intended to make thoroughly clear what is believed to be a consequence of the rest of this License.
8. If the distribution and/or use of the Program is restricted in certain countries either by patents or by copyrighted interfaces, the original copyright
holder who places the Program under this License may add an explicit geographical distribution limitation excluding those countries, so that
distribution is permitted only in or among countries not thus excluded. In such case, this License incorporates the limitation as if written in the
body of this License.
9. The Free Software Foundation may publish revised and/or new versions of the General Public License from time to time. Such new versions
will be similar in spirit to the present version, but may differ in detail to address new problems or concerns.
Each version is given a distinguishing version number. If the Program specifies a version number of this License which applies to it and "any later
version", you have the option of following the terms and conditions either of that version or of any later version published by the Free Software
Foundation. If the Program does not specify a version number of this License, you may choose any version ever published by the Free Software
Foundation.
10. If you wish to incorporate parts of the Program into other free programs whose distribution conditions are different, write to the author to ask
for permission. For software which is copyrighted by the Free Software Foundation, write to the Free Software Foundation; we sometimes make
exceptions for this. Our decision will be guided by the two goals of preserving the free status of all derivatives of our free software and of
promoting the sharing and reuse of software generally.
NO WARRANTY
11. BECAUSE THE PROGRAM IS LICENSED FREE OF CHARGE, THERE IS NO WARRANTY FOR THE PROGRAM, TO THE EXTENT
PERMITTED BY APPLICABLE LAW. EXCEPT WHEN OTHERWISE STATED IN WRITING THE COPYRIGHT HOLDERS AND/OR OTHER
PARTIES PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING, BUT
NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. THE ENTIRE RISK
AS TO THE QUALITY AND PERFORMANCE OF THE PROGRAM IS WITH YOU. SHOULD THE PROGRAM PROVE DEFECTIVE, YOU
ASSUME THE COST OF ALL NECESSARY SERVICING, REPAIR OR CORRECTION.
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12. IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING WILL ANY COPYRIGHT HOLDER, OR ANY
OTHER PARTY WHO MAY MODIFY AND/OR REDISTRIBUTE THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR
DAMAGES, INCLUDING ANY GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE USE OR
INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED TO LOSS OF DATA OR DATA BEING RENDERED INACCURATE OR
LOSSES SUSTAINED BY YOU OR THIRD PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER PROGRAMS),
EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.
END OF TERMS AND CONDITIONS
How to Apply These Terms to Your New Programs
If you develop a new program, and you want it to be of the greatest possible use to the public, the best way to achieve this is to make it free
software which everyone can redistribute and change under these terms.
To do so, attach the following notices to the program. It is safest to attach them to the start of each source file to most effectively convey the
exclusion of warranty; and each file should have at least the "copyright" line and a pointer to where the full notice is found.
one line to give the program's name and an idea of what it does.
Copyright (C) yyyy name of author
This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free
Software Foundation; either version 2 of the License, or (at your option) any later version.
This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.
You should have received a copy of the GNU General Public License along with this program; if not, write to the Free Software Foundation, Inc.,
59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
Also add information on how to contact you by electronic and paper mail.
If the program is interactive, make it output a short notice like this when it starts in an interactive mode:
Gnomovision version 69, Copyright (C) 19yy name of author Gnomovision comes with ABSOLUTELY NO WARRANTY; for details type `show w'.
This is free software, and you are welcome to redistribute it under certain conditions; type `show c' for details.
The hypothetical commands `show w' and `show c' should show the appropriate parts of the General Public License. Of course, the commands
you use may be called something other than `show w' and `show c'; they could even be mouse-clicks or menu items--whatever suits your
program.
You should also get your employer (if you work as a programmer) or your school, if any, to sign a "copyright disclaimer" for the program, if
necessary. Here is a sample; alter the names:
Yoyodyne, Inc., hereby disclaims all copyright interest in the program `Gnomovision' (which makes passes at compilers) written by James Hacker.
signature of Ty Coon, 1 April 1989
Ty Coon, President of Vice
This General Public License does not permit incorporating your program into proprietary programs. If your program is a subroutine library, you
may consider it more useful to permit linking proprietary applications with the library. If this is what you want to do, use the GNU Library General
Public License instead of this License.
Barracuda Products may contain programs that are copyright (c)1995-2005 International Business Machines Corporation and others. All rights
reserved. These programs are covered by the following License:
"Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the
"Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, and/or
sell copies of the Software, and to permit persons to whom the Software is furnished to do so, provided that the above copyright notice(s) and this
permission notice appear in all copies of the Software and that both the above copyright notice(s) and this permission notice appear in supporting
documentation."
Barracuda Products may include programs that are covered by the BSD License: "Redistribution and use in source and binary forms, with or
without modification, are permitted provided that the following conditions are met:
Redistributions of source code must retain the above copyright notice, this list of conditions and the following disclaimer.
Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the following disclaimer in the documentation
196
and/or other materials provided with the distribution.
The names of the authors may not be used to endorse or promote products derived from this software without specific prior written permission.
THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION,
THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE."
Barracuda Products may include the libspf library which is Copyright (c) 2004 James Couzens & Sean Comeau All rights reserved. It is covered
by the following agreement: Redistribution and use in source and binary forms, with or without modification, are permitted provided that the
following conditions are met: 1. Redistributions of source code must retain the above copyright notice, this list of conditions and the following
disclaimer. 2. Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the following disclaimer in the
documentation and/or other materials provided with the distribution. THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR
IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHORS MAKING USE OF THIS LICENSE OR ITS
CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
(INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR
TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
THE POSSIBILITY OF SUCH DAMAGE.
Barracuda Products may contain programs that are Copyright (c) 1998-2003 Carnegie Mellon University. All rights reserved. Redistribution and
use in source and binary forms, with or without modification, are permitted provided that the following conditions are met: 1. Redistributions of
source code must retain the above copyright notice, this list of conditions and the following disclaimer. 2. Redistributions in binary form must
reproduce the above copyright notice, this list of conditions and the following disclaimer in the documentation and/or other materials provided with
the distribution. The name "Carnegie Mellon University" must not be used to endorse or promote products derived from this software without prior
written permission. For permission or any other legal details, please contact Office of Technology Transfer Carnegie Mellon University 5000
Forbes Avenue Pittsburgh, PA 15213-3890 (412) 268-4387, fax: (412) 268-7395 tech-transfer@andrew.cmu.edu .Redistributions of any form
whatsoever must retain the following acknowledgment: "This product includes software developed by Computing Services at Carnegie Mellon
University (http://www.cmu.edu/computing/)." CARNEGIE MELLON UNIVERSITY DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS
SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO EVENT SHALL CARNEGIE MELLON
UNIVERSITY BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING
FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION,
ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
Barracuda products may include programs that are covered by the Apache License or other Open Source license agreements. The Apache
license is re-printed below for you reference. These programs are copyrighted by their authors or other parties, and the authors and copyright
holders disclaim any warranty for such programs. Other programs are copyright by Barracuda Networks.
Apache License
Version 2.0, January 2004
http://www.apache.org/licenses/
TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION
1. Definitions.
"License" shall mean the terms and conditions for use, reproduction, and distribution as defined by Sections 1 through 9 of this document.
"Licensor" shall mean the copyright owner or entity authorized by the copyright owner that is granting the License.
"Legal Entity" shall mean the union of the acting entity and all other entities that control, are controlled by, or are under common control with that
entity. For the purposes of this definition, "control" means (i) the power, direct or indirect, to cause the direction or management of such entity,
whether by contract or otherwise, or (ii) ownership of fifty percent (50%) or more of the outstanding shares, or (iii) beneficial ownership of such
entity.
"You" (or "Your") shall mean an individual or Legal Entity exercising permissions granted by this License.
"Source" form shall mean the preferred form for making modifications, including but not limited to software source code, documentation source,
and configuration files.
"Object" form shall mean any form resulting from mechanical transformation or translation of a Source form, including but not limited to compiled
object code, generated documentation, and conversions to other media types.
"Work" shall mean the work of authorship, whether in Source or Object form, made available under the License, as indicated by a copyright notice
that is included in or attached to the work (an example is provided in the Appendix below).
197
"Derivative Works" shall mean any work, whether in Source or Object form, that is based on (or derived from) the Work and for which the editorial
revisions, annotations, elaborations, or other modifications represent, as a whole, an original work of authorship. For the purposes of this License,
Derivative Works shall not include works that remain separable from, or merely link (or bind by name) to the interfaces of, the Work and Derivative
Works thereof.
"Contribution" shall mean any work of authorship, including the original version of the Work and any modifications or additions to that Work or
Derivative Works thereof, that is intentionally submitted to Licensor for inclusion in the Work by the copyright owner or by an individual or Legal
Entity authorized to submit on behalf of the copyright owner. For the purposes of this definition, "submitted" means any form of electronic, verbal,
or written communication sent to the Licensor or its representatives, including but not limited to communication on electronic mailing lists, source
code control systems, and issue tracking systems that are managed by, or on behalf of, the Licensor for the purpose of discussing and improving
the Work, but excluding communication that is conspicuously marked or otherwise designated in writing by the copyright owner as "Not a
Contribution."
"Contributor" shall mean Licensor and any individual or Legal Entity on behalf of whom a Contribution has been received by Licensor and
subsequently incorporated within the Work.
2. Grant of Copyright License. Subject to the terms and conditions of this License, each Contributor hereby grants to You a perpetual, worldwide,
non-exclusive, no-charge, royalty-free, irrevocable copyright license to reproduce, prepare Derivative Works of, publicly display, publicly perform,
sublicense, and distribute the Work and such Derivative Works in Source or Object form.
3. Grant of Patent License. Subject to the terms and conditions of this License, each Contributor hereby grants to You a perpetual, worldwide,
non-exclusive, no-charge, royalty-free, irrevocable (except as stated in this section) patent license to make, have made, use, offer to sell, sell,
import, and otherwise transfer the Work, where such license applies only to those patent claims licensable by such Contributor that are
necessarily infringed by their Contribution(s) alone or by combination of their Contribution(s) with the Work to which such Contribution(s) was
submitted. If You institute patent litigation against any entity (including a cross-claim or counterclaim in a lawsuit) alleging that the Work or a
Contribution incorporated within the Work constitutes direct or contributory patent infringement, then any patent licenses granted to You under this
License for that Work shall terminate as of the date such litigation is filed.
4. Redistribution. You may reproduce and distribute copies of the Work or Derivative Works thereof in any medium, with or without modifications,
and in Source or Object form, provided that You meet the following conditions:
(a) You must give any other recipients of the Work or Derivative Works a copy of this License; and
(b) You must cause any modified files to carry prominent notices stating that You changed the files; and
(c) You must retain, in the Source form of any Derivative Works that You distribute, all copyright, patent, trademark, and attribution notices from
the Source form of the Work, excluding those notices that do not pertain to any part of the Derivative Works; and
(d) If the Work includes a "NOTICE" text file as part of its distribution, then any Derivative Works that You distribute must include a readable copy
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least one of the following places: within a NOTICE text file distributed as part of the Derivative Works; within the Source form or documentation, if
provided along with the Derivative Works; or, within a display generated by the Derivative Works, if and wherever such third-party notices
normally appear. The contents of the NOTICE file are for informational purposes only and do not modify the License.
You may add Your own attribution notices within Derivative Works that You distribute, alongside or as an addendum to the NOTICE text from the
Work, provided that such additional attribution notices cannot be construed as modifying the License.
You may add Your own copyright statement to Your modifications and may provide additional or different license terms and conditions for use,
reproduction, or distribution of Your modifications, or for any such Derivative Works as a whole, provided Your use, reproduction, and distribution
of the Work otherwise complies with the conditions stated in this License.
5. Submission of Contributions. Unless You explicitly state otherwise, any Contribution intentionally submitted for inclusion in the Work by You to
the Licensor shall be under the terms and conditions of this License, without any additional terms or conditions. Notwithstanding the above,
nothing herein shall supersede or modify the terms of any separate license agreement you may have executed with Licensor regarding such
Contributions.
6. Trademarks. This License does not grant permission to use the trade names, trademarks, service marks, or product names of the Licensor,
except as required for reasonable and customary use in describing the origin of the Work and reproducing the content of the NOTICE file.
7. Disclaimer of Warranty. Unless required by applicable law or agreed to in writing, Licensor provides the Work (and each Contributor provides its
Contributions) on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied, including, without
limitation, any warranties or conditions of TITLE, NON-INFRINGEMENT, MERCHANTABILITY, or FITNESS FOR A PARTICULAR PURPOSE.
You are solely responsible for determining the appropriateness of using or redistributing the Work and assume any risks associated with Your
exercise of permissions under this License.
8. Limitation of Liability. In no event and under no legal theory, whether in tort (including negligence), contract, or otherwise, unless required by
198
applicable law (such as deliberate and grossly negligent acts) or agreed to in writing, shall any Contributor be liable to You for damages, including
any direct, indirect, special, incidental, or consequential damages of any character arising as a result of this License or out of the use or inability to
use the Work (including but not limited to damages for loss of goodwill, work stoppage, computer failure or malfunction, or any and all other
commercial damages or losses), even if such Contributor has been advised of the possibility of such damages.
9. Accepting Warranty or Additional Liability. While redistributing the Work or Derivative Works thereof, You may choose to offer, and charge a fee
for, acceptance of support, warranty, indemnity, or other liability obligations and/or rights consistent with this License. However, in accepting such
obligations, You may act only on Your own behalf and on Your sole responsibility, not on behalf of any other Contributor, and only if You agree to
indemnify, defend, and hold each Contributor harmless for any liability incurred by, or claims asserted against, such Contributor by reason of your
accepting any such warranty or additional liability.
END OF TERMS AND CONDITIONS
APPENDIX: How to apply the Apache License to your work.
To apply the Apache License to your work, attach the following boilerplate notice, with the fields enclosed by brackets "[]" replaced with your own
identifying information. (Don't include the brackets!) The text should be enclosed in the appropriate comment syntax for the file format. We also
recommend that a file or class name and description of purpose be included on the same "printed page" as the copyright notice for easier
identification within third-party archives.
Copyright [yyyy] [name of copyright owner]
Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with the License. You may obtain
a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the specific language governing permissions and
limitations under the License.
Source Code Availability
Per the GPL and other “open source” license agreements the complete machine readable source code for programs covered by the GPL or other
“open source” license agreements is available from Barracuda Networks at no charge. If you would like a copy of the source code or the changes
to a particular program we will gladly provide them, on a CD, for a fee of $100.00. This fee is to pay for the time for a Barracuda Networks
engineer to assemble the changes and source code, create the media, package the media, and mail the media. Please send a check payable in
USA funds and include the program name. We mail the packaged source code for any program covered under the GPL or other "open source"
license.
How to Use the Barracuda Malware Removal Tool
en
The Barracuda Malware Removal Tool performs a comprehensive scan of your computer for any traces of spyware or other malware. This scan is
very thorough and takes several minutes to complete. After the analysis is complete, you can remove all the malware and traces of malware that
have been found.
The Barracuda Malware Removal Tool detects and removes many small traces, cookies, potential spyware files, and temporary files from your
computer. Although these files are normally harmless, removing them can cause some websites to malfunction, and it is generally not appropriate
that the Barracuda Web Filter block them at the network level. As such, the Barracuda Malware Removal Tool may identify potential files for
removal from your computer that are not blocked at the network level by the Barracuda Web Filter.
For maximum security, complete removal of these files from your computer is recommended.
Use the Infection Warning Threshold field to configure whether your users are prompted to run the Barracuda Malware Removal Tool when
spyware is detected on their system. By default, the Barracuda Malware Removal Tool is enabled.
Barracuda recommends that you keep the Infection Warning Threshold field set to 0 in Network Address Translation (NAT) environments
because the Barracuda Web Filter uses the IP address to identify an infected system. As a result, if one system becomes infected with spyware,
then all systems in the NAT environment are prompted to use the Barracuda Malware Removal Tool regardless of their infection status. This issue
can occur when you deploy the Barracuda Web Filter with a pre-existing proxy server.
Enabling the Barracuda Malware Removal Tool
199
To enable users to run the Barracuda Malware Removal Tool:
1. From the BLOCK/ACCEPT > Configuration page, click Yes for the Enable Removal Tool setting in the Infected Client Warning sectio
n.
2. Clear the Infection Activity log so users are not prompted to run the Barracuda Malware Removal Tool based on old infection activity data
or false positives. To clear the log, go to the BASIC > Infection Activity page and click Clear All.
3. On the BLOCK/ACCEPT > Configuration page, enter a value greater than 0 in the Infection Warning Threshold field. When the
number of infection activities on a user’s system exceeds the value of this field, the user is prompted to run the Barracuda Malware
Removal Tool. The user can then select to run the tool immediately or postpone running the tool until the following day.
4. (Optional) Create a dedicated fully qualified hostname for the Barracuda Malware Removal Tool:
a. In the Dedicated Removal Tool Hostname field, enter a custom fully qualified hostname for the tool.
b. Add the custom hostname to your DNS server with the following resolving IP address: 172.27.72.27.
5. Click Save Changes.
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