Sophos UTM Installation Guide
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Sophos UTM
Sophos Transparent
Authentication
Installation Guide
Product version:
1.0
Document date:
Wednesday, February 03, 2016
The specifications and information in this document are subject to change without notice. Companies, names, and data used in examples herein are fictitious unless otherwise noted. This document may not be copied or distributed by any means, in whole or in part, for any reason, without the express written permission of Sophos Limited. Translations of this original manual must be marked as follows: "Translation of the original manual".
© 2016 Sophos Limited. All rights reserved.
http://www.sophos.com
Sophos UTM, Sophos UTM Manager, Astaro Security Gateway, Astaro Command Center, Sophos
Gateway Manager, Sophos iView Setup and WebAdmin are trademarks of Sophos Limited. Cisco is a registered trademark of Cisco Systems Inc. iOS is a trademark of Apple Inc. Linux is a trademark of
Linus Torvalds. All further trademarks are the property of their respective owners.
Limited Warranty
No guarantee is given for the correctness of the information contained in this document. Please send any comments or corrections to [email protected].
Contents
1.1 Operating Principle of STAS
4.2 Configuring STAS Collector
5.2 Defining NetBIOS Domain Data
6.1 STAS Agent and STAS Collector
6.2 STAS Collector and Sophos UTM
6.3 STAS Collector and Workstation
6.3.2 Registry Read Verification
1 Features Overview
Sophos introduces clientless Single Sign On as a Sophos Transparent Authentication Suite
(STAS). This chapter gives an overview of its features and functionality.
Sophos Transparent Authentication Suite eliminates the need to remember multiple passwords as the user logs on to Sophos UTM automatically when he logs on to Windows with his Windows username and password. Moreover, it eliminates the installation of SSO clients on each workstation. Hence, it provides high ease-of-use to end-users and higher levels of security in addition to lowering operational costs involved in client installation.
STAS consists of two main components: l
STAS Agent (on the AD server) l
STAS Collector (on any machine)
STAS Agent: Monitors user authentication requests on the domain controller and sends information to the Collector for Sophos authorization.
STAS Collector: Collects user authentication requests from multiple agents, processes the requests and sends them to Sophos UTM for authorization.
1.1 Operating Principle of STAS
STAS Operating Principle
1.1 Operating Principle of STAS
1 Features Overview
1.
The user logs on to the Active Directory domain controller from any workstation in the
LAN. The domain controller authenticates the user credentials.
Access is only granted for users logged onto the domain. Users who are logged into a workstation directly (or locally) but not logged in as a domain user will not be authenticated and are considered as “unauthenticated” users.
2.
The STAS Agent captures and communicates this authentication process to the STAS
Collector over the default TCP port (5566) in real time.
3.
The STAS Collector registers the user in the local database and communicates the user's IP address and username to Sophos UTM over its default UDP port (6077).
4.
Sophos UTM queries the Active Directory domain controller to determine the user’s group membership and registers the user in the Sophos UTM database.
5.
The STAS Collector regularly polls all workstations available in its user map to check if the same user is still logged in.
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2 Prerequisites
2.1 Configuring AD Controller
2 Prerequisites
Before STAS can be configured, some settings have to be made on Sophos UTM.
The following topics are included in this chapter: l
Configuring the AD controller l
Activating STAS
2.1 Configuring AD Controller
One central element of Sophos Transparent Authentication Suite is the domain controller hosting the STAS Agent. So, before installing STAS, the Active Directory domain controller has to be configured.
To configure the domain controller, proceed as follows:
1.
Log in to the WebAdmin console as administrator.
2.
Navigate to Definition & Users > Authentication Services > Servers.
3.
Click New Authentication Server.
4.
As backend, select Active Directory.
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2.2 Activating STAS
2 Prerequisites
x
Definition of new Authentication Server
5.
Fill in the remaining fields as described in the online help of the WebAdmin console (for help, click the "?" button).
2.2 Activating STAS
To use STAS, it first must be enabled and a collector machine has to defined.
To enable STAS, proceed as follows:
1.
Navigate to Definition & Users > Client Authentication.
2.
Switch to the Sophos Transparent Authentication Suite tab.
3.
Under "STAS Status", activate the toggle switch.
4.
Click New STAS Collector.
5.
As port, select STAS Collector.
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2 Prerequisites
2.2 Activating STAS
Definition of STAS Collector
6.
Fill in the remaining fields as described in the online help of the WebAdmin console (for help, click the "?" button).
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3 Installation
This chapter provides a step-by-step guide to include Sophos Transparent Authentication Suite to Sophos UTM.
The following topics are included in this chapter: l
Downloading STAS l
Installing STAS
3.1 Downloading STAS
The Sophos Transparent Authentication Suite program can be fetched from the Sophos UTM
Support Download page.
To download the program, proceed as follows:
1.
Go to https://www.sophos.com/en-us/support/utm-downloads.aspx
.
2.
Under the section "Sophos Tranparent Authentication Suite (STAS)", download the
STAS installer.
UTM Support Downloads
3.
Follow the on-screen instructions to install STAS on the Active Directory domain controller. Administrative right is required to install STAS.
3.2 Installing STAS
3 Installation
3.2 Installing STAS
On executing the STAS installer file (STAS [version No.] Release.exe) the setup wizard welcome screen appears.
STAS Welcome screen
To start the installation, proceed as follows:
1.
Click Next to proceed.
A window is displayed asking for the destination to install the program.
2.
Specify the installation folder:
1.
Click Next to install STAS at the default location.
2.
Click Browse to change the location and specify a destination folder.
3.
Once the destination is selected, click Next.
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3 Installation
3.2 Installing STAS
For installation, at least 4.1 MB of free disk space is required. The client will not be installed, if there is not enough disk space.
3.
Specify the Start menu folder:
1.
Click Next to create a shortcut of the program at the default location.
2.
Click Browse to change the location and specify a destination folder.
3.
Once the destination is selected, click Next.
4.
Select additional tasks: Enable the respective checkboxes if you want to create a STAS icon on the desktop or a Quick launch icon.
5.
Click Install to install the Sophos Transparent Authentication Suite at the selected location or click Back to change the location.
6.
Select the type of setup:
Type of Setup l
Select STA Agent if you want to monitor user authentication requests on the domain controller and send information to the Collector for authorization on
Sophos UTM.
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3.2 Installing STAS
3 Installation
l
Select STA Collector if you just want to collect user authentication requests from multiple agents, process the requests and send them to Sophos UTM for authorization.
l
Select SSO Suite to install both of the above components.
By default, the entire SSO Suite is installed.
Click Next to proceed.
7.
Specify the administrator user account: xvi
User Account Setup
Specify the username and the password for the user for which you want to launch the service. This user must have administrative rights for the machine on which you are installing
STAS.
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3 Installation
3.2 Installing STAS
Once the installation is completed successfully, the following screen is displayed.
8.
Click Finish to exit.
9.
Check for the Sophos Transparent Authentication Suite from Start > All Programs.
If installed successfully, this tab is added to the Start menu.
After the successful installation, you need to configure STAS on your AD server.
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4.1 Configuring STAS Agent
4 Configuration
4 Configuration
Once the Sophos Transparent Authentication Suite is installed, it has to be configured on the
AD server it is to be applied. This chapter describes the two-steps process to configure STAS on the AD server.
The following topics are included in this chapter: l
Configuring the STAS Agent l
Configuring the STAS Collector l
Showing Live Users l
Starting the STAS Service
4.1 Configuring STAS Agent
To configure the STAS Agent, proceed as follows:
1.
Launch the program from Start > All Programs > STAS > Sophos Transparent Authentic-
ation Suite or from the Desktop shortcut.
2.
Switch to the STA Agent tab and configure the parameters as given below:
1.
In the field "STA Agent Mode", select the workstation communication method
Recommended: EVENTLOG
In case of "Eventlog", the agent has to be installed on the domain controller, in case of "Netapi", the domain controller can be selected.
2.
In the section "Monitored Network", specify the networks to be monitored for user authentication. Multiple networks can be added.
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4 Configuration
4.1 Configuring STAS Agent
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Configuration of STAS Agent xix
4.2 Configuring STAS Collector
4 Configuration
3.
Add the collector(s).
The list order defines the precedence: The top collector gets the information from the agent.
4.
Click Apply.
4.2 Configuring STAS Collector
To configure the STAS Collector, proceed as follows:
1.
Switch to the STA Collector tab and configure the parameters as given below:
1.
In the section "Sophos Appliances", specify the UTM IP address to which the
STAS Collector has to forward user information.
2.
In the section "Workstation Polling Settings", specify the method for polling user information. Available options are: l
WMI l
Registry Read Access
Default: WMI
3.
In the section "Logoff Detection Settings", enable Logoff Detection if you want to monitor user log-offs.
If enabled, specify the Detection Method (either pinging the workstation or polling through WMI or Registry Read Access).
Default: disabled
If enabled, it is recommended to use the WMI detection method.
If you enable Logoff Detection Settings, ensure that the firewalls on all workstations are configured to allow traffic to and from the domain controller.
l
If ping is selected as log off detection method, ensure that the workstation firewall allows ping packets.
l
If WMI polling method is selected, ensure that the workstation firewall allows traffic over UDP port 135.
4.
Dead Entry Timeout: Specify if you want a user to be logged off from the UTM after the mentioned time, even when the Logoff Detection for the users is disabled.
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4 Configuration
4.2 Configuring STAS Collector
5.
In the section "Application Port", specify the UDP port on which the STAS Collector is to listen for requests from Sophos UTM.
Default: 6677
6.
Specify the TCP port on which the STAS Collector is to listen for requests from remote STAS Agents.
Default: 5566
Make sure that the AD server has TCP port 5566 open to communicate with the
STAS Collector. If the STAS Collector also runs on the AD domain controller, UDP port 6677 must be open to communicate with Sophos UTM.
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4.2 Configuring STAS Collector
4 Configuration
xxii
3.
Click Apply.
Configuration of STAS Collector
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4 Configuration
4.3 Showing Live Users
4.3 Showing Live Users
As the STAS Collector is regularly polling user information from its user map administrators have the possibility to check which users are online at a specific point in time.
To see live users, proceed as follows:
1.
Switch to the Advanced tab.
2.
Click the Show live Users button.
Show Live Users
This list is identical with the one shown on the Global tab in the "Client Authentication" section of Sophos UTM.
4.4 Starting STAS Service
Finally, you can start the STA Agent via the General tab on the Sophos Transparent Authentication Suite and check the settings made for the monitored domains.
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4.4 Starting STAS Service
To start the STAS Agent, proceed as follows:
1.
Switch to the General tab.
2.
Start the STAS Agent service.
4 Configuration
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4 Configuration
4.4 Starting STAS Service
Start STAS Service
After configuring STAS on the AD server, you need to make some settings on the AD server.
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5.1 Activating Event Logging
5 Settings on AD Server
5 Settings on AD Server
Several settings are required on the AD server to run Sophos Transparent Authentication
Suite. This chapter lists the necessary procedures.
The following topics are included in this chapter: l
Enabling Security Event Logging l
Determining NetBIOS, FQDN, and Search DN
5.1 Activating Event Logging
To enable security event logging, proceed as follows:
1.
Go to Start > Control Panel > System and Security > Administrative Tools > Local Security
Policy to view the security settings.
2.
Navigate to Local Policies > Audit Policy and double click on Audit account logon events to view the "Audit account logon events Properties" window.
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5 Settings on AD Server
5.2 Defining NetBIOS Domain Data
3.
Enable Audit of Success and Failure logon events, as shown in the screen below.
Audit Account Logon Events
5.2 Defining NetBIOS Domain Data
To determine the NetBIOS name, FQDN and search DN, proceed as follows:
1.
Go to Start > Programs>Control Panel > System and Security > Administrative Tools >
Active Directory Users and Computers.
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5.2 Defining NetBIOS Domain Data
5 Settings on AD Server
2.
Right-click the required domain and go to theProperties tab.
Search DN will be based on the FQDN. In the given example FQDN is w2012r2.nsgqa.test, so the search DN will be DC=w2012r2, DC=nsgqa, DC=test.
Active Directory User Configuration xxviii
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6 Connectivity Test
6.1 STAS Agent and STAS Collector
6 Connectivity Test
Sophos Transparent Authentication Suite(STAS) allows administrators to test the connectivity of a Sophos appliance, STAS Agent and STAS Collector with the AD server where the STAS
Agent/Collector/Suite is installed.
This chapter describes how to test the connectivity between STAS and external devices as well as between the STAS components.
The following topics are included in this chapter: l
Testing the connectivity between STAS Agent and STAS Collector l
Testing the connectivity between STAS Collector and Sophos UTM l
Testing the connectivity between STAS Collector and workstation
6.1 STAS Agent and STAS Collector
To test the connectivity between the STAS Agent (installed on the domain controller) and the
STAS Collector, proceed as follows:
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6.1 STAS Agent and STAS Collector
6 Connectivity Test
1.
Launch STAS and switch to the Advanced tab.
2.
Under the "Test Connectivity" section, specify the IP address of the STAS Collector.
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6 Connectivity Test
6.2 STAS Collector and Sophos UTM
3.
Click Test to test the connection with Sophos.
If the connection is successful, the following screen is displayed
If the connection fails, the following screen is displayed:
6.2 STAS Collector and Sophos UTM
To test the connectivity between Sophos Transparent Authentication Suite (installed as a collector/suite on the Windows desktop) and Sophos UTM, proceed as follows:
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6.2 STAS Collector and Sophos UTM
6 Connectivity Test
1.
Launch STAS and switch to the Advanced tab.
2.
Under the "Test Connectivity" section, specify the IP address of the Sophos UTM.
3.
Click Test to test the connection with Sophos UTM.
If the connection is successful, the following screen is displayed xxxii
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6 Connectivity Test
6.3 STAS Collector and Workstation
If the connection fails, the following screen is displayed:
6.3 STAS Collector and Workstation
You can check the connectivity between a workstation and the STAS Collector in two ways: l
WMI Verification l
Registry Read Verification
6.3.1 WMI Verification
Use this method only if the Workstation Polling Method is set to "WMI".
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6.3 STAS Collector and Workstation
6 Connectivity Test
To check the connectivity using WMI, proceed as follows:
1.
Launch STAS and switch to the Advanced tab.
2.
In section "Troubleshooting" in the field STAS Polling Utilities enter the IP address of the workstation.
3.
Click Test.
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6 Connectivity Test
6.3 STAS Collector and Workstation
To perform a successful WMI verification, access to UDP port 135 must be allowed by the workstation firewall.
6.3.2 Registry Read Verification
Use this method only if the Workstation Polling Method is set to "Registry Read Access".
To check the connectivity using Registry Read Access, proceed as follows:
1.
Launch STAS and switch to the Advanced tab.
2.
In the section "Troubleshooting" in the field STAS Polling Utilities enter the IP address of the workstation.
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6.3 STAS Collector and Workstation
3.
Click Test.
6 Connectivity Test
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6 Connectivity Test
6.3 STAS Collector and Workstation
To perform a successful Registry Read verification, the remote registry service should be started on the workstation.
To check the service:
1.
Launch Run and open services.msc.
2.
Select Remote Registry and make sure that the service is started.
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