Cyberoam Version 10 Anti Spam Implementation Guide
إعلان
إعلان
Cyberoam Anti Spam Configuration Guide
Important Notice
Cyberoam Technologies Pvt. Ltd. has supplied this Information believing it to be accurate and reliable at the time of printing, but is presented without warranty of any kind, expressed or implied. Users must take full responsibility for their application of any products. Cyberoam Technologies Pvt. Ltd. assumes no responsibility for any errors that may appear in this document.
Cyberoam Technologies Pvt. Ltd. reserves the right, without notice to make changes in product design or specifications.
Information is subject to change without notice.
USER’S LICENSE
Use of this product and document is subject to acceptance of the terms and conditions of Cyberoam End User License
Agreement (EULA) and Warranty Policy for Cyberoam UTM Appliances.
You will find the copy of the EULA at http://www.cyberoam.com/documents/EULA.html
and the Warranty Policy for Cyberoam
UTM Appliances at http://kb.cyberoam.com
.
RESTRICTED RIGHTS
Copyright 1999 - 2014 Cyberoam Technologies Pvt. Ltd. All rights reserved. Cyberoam, Cyberoam logo are trademark of
Cyberoam Technologies Pvt. Ltd.
Corporate Headquarters
Cyberoam House,
Saigulshan Complex, Opp. Sanskruti,
Beside White House, Panchwati Cross Road,
Ahmedabad - 380006, GUJARAT, INDIA.
Tel: +91-79-66216666
Web site: www.cyberoam.com
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Cyberoam Anti Spam Configuration Guide
Contents
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Cyberoam Anti Spam Configuration Guide
Preface
Cyberoam Unified Threat Management appliances offer identity-based comprehensive security to organizations against blended threats - worms, viruses, malware, data loss, identity theft; threats over applications viz. Instant Messengers; threats over secure protocols viz. HTTPS; and more.
They also offer wireless security (WLAN) and 3G wireless broadband and analog modem support can be used as either Active or Backup WAN connection for business continuity.
Cyberoam integrates features like stateful inspection firewall, VPN, Gateway Anti-Virus and Anti-
Spyware, Gateway Anti-Spam, Intrusion Prevention System, Content & Application Filtering, Data
Leakage Prevention, IM Management and Control, Layer 7 visibility, Bandwidth Management,
Multiple Link Management, Comprehensive Reporting over a single platform.
Cyberoam has enhanced security by adding an 8th layer (User Identity) to the protocol stack.
Advanced inspection provides L8 user-identity and L7 application detail in classifying traffic, enabling Administrators to apply access and bandwidth policies far beyond the controls that traditional UTMs support. It thus offers security to organizations across layer 2 - layer 8, without compromising productivity and connectivity.
Cyberoam UTM appliances accelerate unified security by enabling single-point control of all its security features through a Web 2.0based GUI. An extensible architecture and an ‘IPv6 Ready’
Gold logo provide Cyberoam the readiness to deliver on future security requirements.
Cyberoam provides increased LAN security by providing separate port for connecting to the publicly accessible servers like Web server, Mail server, FTP server etc. hosted in DMZ which are visible the external world and still have firewall protection.
Note
Default Web Admin Console username is ‘admin’ and password is ‘admin’
Cyberoam recommends that you change the default password immediately after installation to avoid unauthorized access.
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Cyberoam Anti Spam Configuration Guide
Technical Support
You may direct all questions, comments, or requests concerning the software you purchased, your registration status, or similar issues to Customer care/service department at the following address:
Cyberoam House
Saigulshan Complex, Opp. Sanskruti,
Beside White House, Panchwati Cross Road,
Ahmedabad - 380006, GUJARAT, INDIA.
Ahmedabad 380006
Gujarat, India.
Tel: +91-79-66216666
Web site: www.cyberoam.com
Cyberoam contact:
Technical support (Corporate Office): +91-79- 26400707
Email: [email protected]
Web site: www.cyberoam.com
Visit www.cyberoam.com
for the regional and latest contact information.
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Cyberoam Anti Spam Configuration Guide
Introduction
Welcome to Cyberoam’s – Anti Spam User guide.
This Guide provides information on how to configure Cyberoam Anti Spam solution and helps you manage and customize Cyberoam to meet your organization’s various requirements including restriction of spam mails, creation of groups and archiving Emails to control web as well as application access.
Anti Spam module is an add-on module which needs to be subscribed before use.
Note
All the screen shots in the Cyberoam User Guides have been taken from NG series of appliances. The feature and functionalities however remains unchanged across all Cyberoam appliances.
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Appliance Administrative
Interfaces
Appliance can be accessed and administered through:
1. Web Admin Console
2. Command Line Interface Console
3. Cyberoam Central Console
Administrative Access An administrator can connect and access the Appliance through HTTP,
HTTPS, telnet, or SSH services. Depending on the Administrator login account profile used for access, an administrator can access number of Administrative Interfaces and Web Admin Console configuration pages.
Appliance is shipped with two administrator accounts and four administrator profiles.
Administrator Type Login Credentials
Super Administrator admin/admin
Default cyberoam/cyber
Console Access
Web Admin Console
CLI console
Web Admin console only
Privileges
Full privileges for both the consoles. It provides readwrite permission for all the configuration performed through either of the consoles.
Full privileges. It provides read-write permission for all the configuration pages of
Web Admin console.
Note
We recommend that you change the password of both the users immediately on deployment.
Web Admin Console
Web Admin Console is a web-based application that an Administrator can use to configure, monitor, and manage the Appliance.
You can connect to and access Web Admin Console of the Appliance using HTTP or a HTTPS connection from any management computer using web browser:
1. HTTP login: http://<LAN IP Address of the Appliance>
2. HTTPS login: https://<LAN IP Address of the Appliance>
For more details, refer section Web Admin Console .
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Cyberoam Anti Spam Configuration Guide
Command Line Interface (CLI) Console
Appliance CLI console provides a collection of tools to administer, monitor and control certain
Appliance component. The Appliance can be accessed remotely using the following connections:
1. Remote login Utility
– TELNET login
To access Appliance from command prompt using remote login utility
– Telnet, use command
TELNET <LAN IP Address of the Appliance>. Use administrator password to login.
Note
Default password of TELNET connection for CLI Console is “admin”.
2. SSH Client (Serial Console)
SSH client securely connects to the Appliance and performs command-line operations. CLI console of the Appliance can be accessed via any of the SSH client using LAN IP Address of the
Appliance and providing Administrator credentials for authentication.
Note
Start SSH client and create new Connection with the following parameters:
Host
– <LAN IP Address of the Appliance>
Username
– admin
Password
– admin
Use CLI console for troubleshooting and diagnose network problems in details. For more details, refer version specific Console Guide available on http://docs.cyberoam.com/ .
Cyberoam Central Console (CCC)
Distributed Cyberoam Appliances can be centrally managed using a single Cyberoam Central
Console (CCC) Appliance, enabling high levels of security for Managed Security Service Provider
(MSSPs) and large enterprises. To monitor and manage Cyberoam using CCC Appliance you must:
1. Configure CCC Appliance in Cyberoam
2. Integrate Cyberoam Appliance with CCC using: Auto Discovery, Manually
Once you have added the Appliances and organized them into groups, you can configure single
Appliance or groups of Appliances.
For more information, please refer CCC Administrator Guide.
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Web Admin Console
CyberoamOS uses a Web 2.0 based easy-to-use graphical interface termed as Web Admin
Console to configure and manage the Appliance.
You can access the Appliance for HTTP and HTTPS web browser-based administration from any of the interfaces. Appliance when connected and powered up for the first time, it will have a following default Web Admin Console Access configuration for HTTP and HTTPS services.
Services
HTTP
HTTPS
Interface/Zones
LAN, WAN
WAN
Default Port
TCP Port 80
TCP Port 443
The administrator can update the default ports for HTTP and HTTPS services from System >
Administration > Settings.
Web Admin Language
The Web Admin Console supports multiple languages, but by default appears in English. To cater to its non-English customers, apart from English, Chinese-Simplified, Chinese-Traditional, Hindi,
Japanese and French languages are also supported. Administrator can choose the preferred GUI language at the time of logging on.
Listed elements of Web Admin Console will be displayed in the configured language:
Dashboard Doclet contents
Navigation menu
Screen elements including field & button labels and tips
Error messages
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Supported Browsers
You can connect to the Web Admin Console of the Appliance using HTTP or a secure HTTPS connection from any management computer using one of the following web browsers:
Browser
Microsoft Internet Explorer
Mozilla Firefox
Google Chrome
Supported Version
Version 8+
Version 3+
All versions
Safari
Opera
5.1.2(7534.52.7)+
15.0.1147.141+
The minimum screen resolution for the management computer is 1024 X 768 and 32-bit true xxcolor.
The Administrator can also specify the description for firewall rule, various policies, services and various custom categories in any of the supported languages.
All the configuration done using Web Admin Console takes effect immediately. To assist you in configuring the Appliance, the Appliance includes a detailed context-sensitive online help.
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Login procedure
The log on procedure authenticates the user and creates a session with the Appliance until the user logs-off.
To get to the login window, open the browser and type the LAN IP Address of Cyberoam in the browser’s URL box. A dialog box appears prompting you to enter username and password.
Screen
– Login Screen
Screen Element Description
Username
Password
Enter user login name.
If you are logging on for the first time after installation, use the default username.
Specify user account password.
Dots are the placeholders in the password field.
If you are logging on for the first time after installation with the default username, use the default password.
Language
Log on to
Select the language. The available options are Chinese-
Simplified, Chinese-Traditional, English, French, and
Hindi.
Default
– English
To administer Cyberoam, select ‘Web Admin Console’
To view logs and reports, select “Reports”.
To login into your account, select “My Account”.
Login button
Click to log on the Web Admin Console.
Screen
– Login screen elements
The Dashboard appears as soon as you log on to the Web Admin Console. It provides a quick and fast overview of all the important parameters of your Appliance.
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Log out procedure
To avoid un-authorized users from accessing Cyberoam, log off after you have finished working.
This will end the session and exit from Cyberoam.
To log off from the Appliance, click the
Admin Console pages.
button located at the top right of any of the Web
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Menus and Pages
The Navigation bar on the leftmost side provides access to various configuration pages. This menu consists of sub-menus and tabs. On clicking the menu item in the navigation bar, related management functions are displayed as submenu items in the navigation bar itself. On clicking submenu item, all the associated tabs are displayed as the horizontal menu bar on the top of the page. To view a page associated with the tab, click the required tab.
The left navigation bar expands and contracts dynamically when clicked on without navigating to a submenu. When you click on a top-level heading in the left navigation bar, it automatically expands that heading and contracts the heading for the page you are currently on, but it does not navigate away from the current page. To navigate to a new page, first click on the heading, and then click on the submenu you want navigate to. On hovering the cursor upon the up-scroll icon or the down-scroll icon , automatically scrolls the navigation bar up or down respectively.
The navigation menu includes following modules:
System
– System administration and configuration, firmware maintenance, backup - restore
Objects
– Configuration of various policies for hosts, services, schedules and file type
Networks
– Network specific configuration viz., Interface speed, MTU and MSS settings,
Gateway, DDNS
Identity
– Configuration and management of User and user groups
Firewall
– Firewall Rule Management
VPN
– VPN and SSL VPN access configuration
IPS
– IPS policies and signature
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Web Filter
– Web filtering categories and policies configuration
Application Filter
– Application filtering categories and policies configuration
WAF
– Web Application Filtering policies configuration. Available in all the models except
CR15iNG and CR15wiNG.
IM
– IM controls
QoS
– Policy management viz., surfing quota, QoS, access time, data transfer
Anti Virus
– Antivirus filtering policies configuration
Anti Spam
– Anti Spam filtering policies configuration
Traffic Discovery
– Traffic monitoring
Logs & Reports
– Logs and reports configuration
Note
Use F1 key for page-specific help.
Use F10 key to return to Dashboard.
Each section in this guide shows the menu path to the configuration page. For example, to reach the Zone page, choose the Network menu, then choose Interface sub-menu from the navigation bar, and then choose Zone tab. Guide mentions this path as Network > Interface > Zone.
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Page
A typical page looks as shown in the below given image:
Cyberoam Anti Spam Configuration Guide
Screen
– Page
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Icon bar
The Icon bar on the upper rightmost corner of every page provides access to several commonly used functions like:
1. Dashboard
– Click to view the Dashboard
2. Wizard
– Opens a Network Configuration Wizard for a step-by-step configuration of the network parameters like IP Address, subnet mask and default gateway for your Appliance.
3. Report
– Opens a Reports page for viewing various usage reports. Integrated Logging and
Reporting solution - iView, to offer wide spectrum of 1000+ unique user identity-based reporting across applications and protocols and provide in-depth network visibility to help organizations take corrective and preventive measures.
This feature is not available for CR15xxxx series of Appliances.
4. Console
– Provides immediate access to CLI by initiating a telnet connection with CLI without closing Web Admin console.
5. Logout
– Click to log off from the Web Admin Console.
6. More Options
– Provides options for further assistance. The available options are as follows:
Support
– Opens the customer login page for creating a Technical Support Ticket. It is fast, easy and puts your case right into the Technical Support queue.
About Product
– Opens the Appliance registration information page.
Help
– Opens the context – sensitive help page.
Reset Dashboard
– Resets the Dashboard to factory default settings.
Lock
– Locks the Web Admin Console. Web Admin Console is automatically locked if the
Appliance is in inactive state for more than 3 minutes. To unlock the Web Admin Console you need to re-login. By default, Lock functionality is disabled. Enable Admin Session Lock from System > Administration > Settings.
Reboot Appliance
– Reboots the Appliance.
Shutdown Appliance
– Shut downs the Appliance.
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List Navigation Controls
The Web Admin Console pages display information in the form of lists that are spread across the multiple pages. Page Navigation Control Bar on the upper right top corner of the list provides navigation buttons for moving through the list of pages with a large number of entries. It also includes an option to specify the number entries/records displayed per page.
Tool Tips
To view the additional configuration information use tool tip. Tool tip is provided for many configurable fields. Move the pointer over the icon
Status Bar
to view the brief configuration summary.
The Status bar at the bottom of the page displays the action status.
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Common Operations
Adding an Entity
You can add a new entity like policy, group, user, rule, ir host by clicking the Add button available on most of the configuration pages. Clicking this button either opens a new page or a pop-up window.
Editing an Entity
All the editable entities are hyperlinked. You can edit any entity by clicking either the hyperlink or the Edit icon under the Manage column.
Deleting an Entity
You can delete an entity by selecting the checkbox and clicking the Delete button or Delete icon.
To delete multiple entities, select individual entity and click the Delete button.
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To delete all the entities, select in the heading column and click the Delete button.
Sorting Lists
To organize a list spread over multiple pages, sort the list in ascending or descending order of a column attribute. You can sort a list by clicking a column heading.
Ascending Order icon in a column heading indicates that the list is sorted in ascending order of the column attribute.
Descending Order icon order of the column attribute. in a column heading indicates that the list is sorted descending
Filtering Lists
To search specific information within the long list spread over multiple pages, filter the lists.
Filtering criteria vary depending on a column data and can be a number or an IP address or part of an address, or any text string combination.
To create filter, click the Filter icon in a column heading. When a filter is applied to a column, the Filter icon changes to .
Configuring Column Settings
By default on every page all columnar information is displayed but on certain pages where a large number of columnar information is available, all the columns cannot be displayed. It is also possible that some content may not be of use to everyone. Using column settings, you can configure to display only those numbers of columns which are important to you.
To configure column settings, click Select Column Settings and select the checkbox against the columns you want to display and clear the checkbox against the columns which you do not want to display. All the default columns are greyed and not selectable.
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Cyberoam Anti Spam Configuration Guide
Spam
Spam refers to electronic junk mail or junk newsgroup postings. Some people define spam even more generally as any unsolicited Email.
Spamming is to indiscriminately send unsolicited, unwanted, irrelevant, or inappropriate messages, especially commercial advertising in mass quantities. In other words, it is an inappropriate attempt to use a mailing list, or other networked communications facility as a broadcast medium by sending the same message to a large number of people who did not ask for it.
In addition to being a nuisance, it also eats up a lot of network bandwidth. Because the Internet is a public network, little can be done to prevent spam, just as it is impossible to prevent junk mail.
However, the use of software filters in Email programs can be used to remove most spam sent through Email to certain extent.
With the number of computer users growing and the exchange of information via the Internet and
Email increases in volume, spamming has become an almost everyday occurrence. Apart from network bandwidth, it also affects the employees productive as deletion of such mails is a huge task. Anti spam protection is therefore a priority for anyone who uses a computer.
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Cyberoam Gateway Anti
Spam
Cyberoam Gateway Anti Spam provides a powerful tool for scanning and detecting infection and
Spam in the mail traffic (SMTP, POP3, and IMAP) as well as web (HTTP) traffic that passes through the appliance. Cyberoam Anti Spam as a part of unified solution along with Anti Virus and
IPS (Intrusion Prevention System) provides real time virus scanning that protects all network nodes
– workstations, files servers, mail system from known and unknown attacks by worms and viruses, Trojans, spyware, adware, spam, hackers and all other cyber threats.
Cyberoam detects spam mails based on:
RBL (Real time Blackhole List)
Mass distribution pattern using RPD (Recurrent Pattern Detection) technology for which
Gateway Anti Spam module subscription is required. RPD technology responsible for proactively probing the Internet to gather information about massive spam outbreaks from the time they are launched. This technology is used to identify recurrent patterns that characterize massive spam outbreaks.
Cyberoam Gateway Anti Spam solution provides a powerful tool for scanning and detecting infection and Spam in the mail traffic (SMTP, POP3, and IMAP) as well as web (HTTP) traffic that passes through the appliance. It inspects all the inbound mails i.e., incoming Emails - SMTP,
POP3, and IMAP traffic - before the messages are delivered to the receiver's mail box and all outbound mails i.e., outgoing Emails - SMTP traffic - sent by the user from an Email Client. Two separate policies and firewall rules must be configured for inbound and outbound mail traffic. If
Spam is detected, depending on the policy and the rules set, action is taken on Email. On detecting a Spam in incoming traffic, Emails are processed and delivered to the recipient unaltered, reject and generate a notification on the message rejection, add or change subject or change the receiver. If Spam is detected in an outgoing SMTP traffic, Emails are rejected and generate a notification on the message rejection, dropped and a notification is generated or changes the receiver. Integration into existing network is easy as it is fully compatible with all the mail systems.
Note
Outbound Anti Spam is a subscription based module.
Cyberoam Anti Spam allows to:
Scan Email messages for spamming by protocols namely SMTP, POP3, IMAP
Monitor and proactively detect recurrent patterns in spam mails and combat multi-format
– text, images, HTML etc. and multi-language threats
Monitor mails received from Domain/IP Address
Detect spam mails using RBLs. If Anti Spam module is not subscribed, Cyberoam will detect spam mails based on RBL only and not on recurrent patterns in mails.
Accept/Reject messages based on message size and message header
Customize protection of incoming and outgoing Email messages by defining scan policies
Set different actions for SMTP, POP and IMAP spam mails
Configure action for individual Email Address
Notify receivers about spam messages
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Configuration
Anti Spam Configuration allows configuring scanning rules for traffic
– SMTP, POP, and IMAP defined on Address Groups or individual Emails Address or IP Address or RBLs. Administrator is notified for critical events via system warnings and Email notifications. The administrator can archive almost all the Emails coming into the organization and thereby keep a close watch over data leakage.
Configure restrictions on mails from Anti Spam > Configuration > Configuration.
Screen
– Configure Parameters
Screen Elements
Bypass Spam Check
For
Authenticated
Connections
Verify
Reputation
SMTP
Sender’s IP
Description
Click “Bypass Spam check for SMTP Authenticated
Connections” to bypass the Spam scanning of the authenticated traffic.
If enabled, SMTP authenticated connections are bypassed from RBL and RPD based Spam checking.
By default, it is disabled.
Enable IP Reputation, if you want to verify the reputation of the sender IP Address. Cyberoam dynamically checks the sender IP Address and denies SMTP connection if IP
Address is found to be responsible for sending spam mails or malicious contents.
If enabled, specify action for confirmed Spam Emails and
Probable Spam Emails.
Accept
– all the spam Emails are forwarded to the recipient after scanning as per the configuration
Reject
– all the spam mails are rejected and notification is displayed to the user.
Drop
– all the spam mails are dropped.
If both “Bypass Spam check for SMTP authenticated
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SMTP Mails Greater
Than Size
SMTP Oversize Mail
Action
POP3 / IMAP Mails
Greater Than Size
Connections” and “Verify Sender’s IP reputation” are enabled, for the authenticated connections, spam scanning based on RBL and RPD will be given the precedence.
Specify maximum size (in KB) of the file to be scanned.
Files exceeding this size received through SMTP will not be scanned.
By default, SMTP mails exceeding 1024 KB in size are not scanned.
Specify 0 to increase default file size restriction for scanning to 51200 KB i.e. files exceeding 51200 KB will not be scanned if 0 is configured.
Note
For Cyberoam CR15i models:
Specify 0 for default size restriction of 1024 KB i.e. files exceeding 1024 KB will not be scanned if 0 is configured.
Specify the action to be taken on oversize files i.e. Accept,
Reject and Drop.
Accept
– all the oversize mails are forwarded to the recipient without scanning.
Reject
– all the oversize mails are rejected and notification is displayed to the user.
Drop
– all the oversize mails are dropped.
Specify maximum size (in KB) of the file to be scanned.
Files exceeding this size received through POP / IMAP will not be scanned and forwarded to the recipient without scanning.
By default, POP3/IMAP mails exceeding 1024 KB in size are not scanned.
Specify 0 to increase default file size restriction for scanning to 10240 KB i.e. files exceeding 10240 KB will not be scanned if 0 is configured.
Header To Detect
Recipient or POP3 /
IMAP
Note
For Cyberoam CR15i models:
Specify 0 for default size restriction of 1024 KB i.e. files exceeding 1024 KB will not be scanned if 0 is configured.
Specify Header value to detect recipient for POP3 / IMAP.
Click Add icon to add headers and Remove icon to delete the header which is used for detecting the recipi ent’s address.
Table
– Configure Parameters screen elements
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Address Group
Address Group is the group of Email Addresses, IP Addresses, or RBLs. An address can be member of multiple groups. To make configuration simpler you can group addresses when applying policy. Policy applied on the address group is applicable on all the group members.
To make it easier to add Anti Spam rules, create groups of Email Addresses or IP Addresses, or
RBLs and then add one Spam Rule to take action for all Address in the group. An Address can be member of multiple groups i.e. Address can be included in multiple Address Group.
Scanning rule can be defined for individual or group of
Email Address or Domain
IP Address
RBL (Real time black hole List) (applicable only for the spam mails)
RBL is a list of IP Addresses whose owners refuse to stop the proliferation of spam i.e. are responsible for spam or are hijacked for spam relay. This IP Addresses might also be used for spreading virus.
Cyberoam will check each RBL for the connecting IP Address. If the IP Address matches to the one on the list then the specified action in policy is taken.
Manage Address Group
To manage Address Groups, go to Anti Spam > Configuration > Address Group.
Screen
– Manage Address Group
Screen Elements
Add Button
Name
Type
Description
Import Icon
Edit Icon
Delete Button
Description
Add a new Address Group.
Name of the Address Group.
Type of Group: RBL, IP Address, Email Address/Domain.
Displays Address Group Description.
Click to import the Address Groups.
Edit the Address Group.
Delete the Address Group.
Alternately, click the Delete icon against the address group to be deleted.
Table
– Manage Address Group screen elements
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Import Email Address into an existing Address Group
Instead of adding addresses again in Cyberoam, if you already have address detail in a file, you can upload file. If the file has multiple addresses then each address must be on the new line. File with comma-separated address will give error at the uploading.
Click the Import Button to import CSV or text file. Select the complete path of information file.
Address Group Parameters
To add or edit an Address Group, go to Anti Spam > Configuration > Address Group.
Click Add Button to add a new group or Edit Icon to modify the details.
Screen
– Add Address Group
Screen Elements
Name
Group Type
Description
Specify a name to identify the Group.
Select the Group Type.
Available Options:
RBL
– RBL is a list of IP Addresses whose owners refuse to stop the proliferation of spam i.e. are responsible for spam or are hijacked for spam relay.
Cyberoam will check each RBL for the connecting IP
Address. If the IP Address matches to the one on the list then the specified action in policy is taken.
Specify Domain Name to be added as RBLs to the
Address Group.
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Description
Cyberoam Anti Spam Configuration Guide
IPv4 Address
– Specify IP Addresses or Network address that you want to group.
Email Address / Domain
– Specify Email Address or
Domain Name to be added to the Address Group.
On selecting “Email Address/Domain” select the type of Address Group from the available options:
Available Options:
Import
– Select to browse and import a CSV file or a text file to add the Email Address/Domain to address group.
Manual
– Select to manually add the Email
Address/Domain to address group.
Use Add button to add value to the list and to delete value to the list.
Provide description for Address Group.
Table
– Add Address Group screen elements
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Email Archiver
If you want Administrator or any other person in the organization to know about incoming mails into the organization, you can specify Email Address to which you want to forward the copy of such mails.
By using Email Archiver, the administrator can archive almost all the Emails coming into the organization and thereby keep a close watch over data leakage. Emails of a specific recipient or a group of recipients can be archived using Email Archiver. Create multiple archivers to send a copy of Emails to more than one administrator.
Cyberoam can archive all Emails intended for a single or multiple recipients and can be forwarded to the single administrator or multiple administrators from Anti Spam > Configuration >
Email Archiver.
Screen
– Manage Email Archives
Screen Elements
Add Button
Name
Recipient
Send Copy To
Edit Icon
Delete Button
Description
Add a new Email Archive.
Email Archiver name.
Email Address of the recipient whose emails are archived.
Email Address to which the Email copy is sent.
This option can be applied to SMTP protocol only.
Edit the Email Archiver.
Delete the Email Archiver.
Alternately, click the Delete icon against the Email
Archiver to be deleted.
Table
– Manage Email Archivers screen elements
Add Email Archiver
To add or edit Email Archiver, go to Anti Spam > Configuration > Email Archiver. Click the Add button to add an Email Archiver. To update the details, click on the Email Archiver or Edit icon in the Manage column against the Archivers you want to modify.
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Screen Elements
Name
Recipient
Screen
– Add Email Archiver
Description
Specify a name for the Email Archiver.
Select Email Address of the recipient whose Emails are to be archived.
You can also add a new Email Address or domain from the Email Archiver page itself.
Send Copy Of Email To
Specify Email Address to which the Email copy is to be sent.
This option can be applied to SMTP protocol only.
Table
– Add Email Archiver screen elements
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Spam Rules
As soon as you subscribe Cyberoam Gateway Anti Spam, Spam Rules can be configured for particular sender and recipients.
Spam Rule defines what action is to be taken if the mail is identified as a spam and to which Email
Address the copy of mail is to be sent. These rules can be applied directly to Email Addresses now and thus, traffic can be directly scanned for Spam mails.
To reduce the risk of losing the legitimate messages, spam quarantine repository - a storage location, provides administrators a way to automatically quarantine and remediate messages that are identified as spam.
This will help in managing spam and probable spam quarantined mails and you can take appropriate actions on such mails.
Detection of Spam attributes
Cyberoam uses content filtering and three RBLs - Real time Blackhole Lists
– to check for the spam attributes in SMTP as well as POP3 / IMAP mails:
Premium
Standard
RBL is a list of IP Addresses whose owners refuse to stop the proliferation of spam i.e. are responsible for spam or are hijacked for Spam Relay.
Cyberoam will check each RBL for the connecting IP Address. If the IP Address matches to the one on the list then the specified action in policy is taken.
Manage Spam Rules
To manage Spam Rules, go to Anti Spam > Spam Rules > Spam Rules.
Screen Elements
Name
Sender
Recipient
Rules
Action
Screen
– Manage Spam Rules
Description
Displays name of the Spam Rule.
Sender Email ID.
Recipient Email ID.
Conditional Rule for restricting spam mails.
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Cyberoam Anti Spam Configuration Guide
SMTP
POP3/IMAP
Spam Rule Parameters
Conditions applied for the SMTP mails.
Conditions applied for the POP3 mails.
Table
– Manage Spam Rules screen elements
To add or edit a Spam Rule, go to Anti Spam > Spam Rules > Spam Rules. Click the
Add button to add a Spam Rule. To update the rules, click on the Spam Rule or Edit icon in the
Manage column against the rule to be modified.
Note
On subscribing Outbound Spam, parameter “Anti Spam Module Has Identified Mail As” is renamed as
“Inbound Anti Spam Module Has Identified Mail As” is displayed.
Screen Elements
Name
Recipient Email
Screen
– Add Spam Rule
Description
Specify a name for Anti Spam Rule.
Select Recipient Email Address. You can also add a list of
Email Address using
“Add Email Address” link.
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Sender Email
Cyberoam Anti Spam Configuration Guide
Select Sender Email Address. You can also add a list of
Email Add ress using ‘Add Email Address’ link.
IF Conditions
Anti Spam / Inbound
Anti Spam Module Has
Identified Mail As
(Parameter “Inbound
Anti Spam Module Has
Identified Mail As” is displayed on Outbound
Spam subscription)
Outbound Anti Spam
Module Has Identified
From
As subscription)
IP
Belongs To
(Option available only on
Address
All the Email messages that are received by the users those are in a network protected by Appliance are referred as Inbound.
On configuring Appliance Inbound Spam, all the messages received by the users are scanned for spam and Email virus outbreak by the Appliance.
Specified action will be taken if the Anti Spam module has identified the Inbound Email to be one of the following:
Spam
Probable Spam
Virus Outbreak
Probable Virus Outbreak
You can set different actions for SMTP and POP mails.
Messages that are sent by the user from network protected by the Appliance to a remote user on other mail system are referred as Outbound.
On configuring Appliance Outbound Spam, all the messages sent by the users are scanned before being delivered to other users on internet for spam and Email virus outbreak.
Specified action will be taken if the Anti Spam module has identified the Outbound Email to be one of the following:
Spam
Probable Spam
Virus Outbreak
Probable Virus Outbreak
Note
Outbound Spam is a subscription module.
You can set different actions only for SMTP.
This feature is not available in Cyberoam Models CRi series, CRwi series, CR15iNG, CR15wiNG, CR25ia and
CR500i-8P.
Specified action will be taken if the mail sender IP
Address matches the specified IP Address.
You can set different actions for SMTP and POP mails.
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Cyberoam Anti Spam Configuration Guide
Sender IP Address
Blacklisted by RBL
Message Size Is
Select Message Header
None
Specified action will be taken if the sender is listed in the specified RBL Group.
You can set different actions for SMTP and POP mails.
Specified action will be taken if the mail size matches the specified size.
You can set different actions for SMTP and POP mails.
Specified action will be taken if the message header contains the specified text or is equal to the specified text.
You can set different actions for SMTP and POP mails.
You can scan message header for spam in:
Subject
– Specified action will be taken when the matching text is found in the headers configured as per the matching criteria.
From
– Specified action will be taken when the matching address is found in the headers configured as per the matching criteria.
To
– Specified action will be taken when the matching address is found in the headers configured as per the matching criteria.
Others
– Specified action will be taken when the matching text is found in the headers configured as per the matching criteria.
Select ‘None’ when you want to create a rule between specific sender and recipient without any conditions. You can set actions for SMTP and POP3/IMAP mails only on the basis of sender and recipient.
Then
SMTP Action
Select the Action to be taken for SMTP traffic.
Available Options:
Reject
Drop
Accept (only for Inbound Spam)
Change Recipient
Prefix Subject (only for Inbound Spam)
POP3/IMAP Action (Only for
Inbound Spam)
Select the Action to be taken for POP3 / IMAP traffic.
Available Options:
Accept
Prefix Subject
Table
– Add Spam Rule screen elements
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Cyberoam Anti Spam Configuration Guide
Following actions can be taken on the mail identified as the SPAM, Probable SPAM, VIRUS
OUTBREAK or Probable VIRUS OUTBREAK.
Protocol
SMTP
SMTP
SMTP, POP3
SMTP
SMTP, POP3
SMTP
Action
Reject
Drop
Accept
Meaning
Mail is rejected and rejection notification is sent to the mail sender.
Mail is rejected but rejection notification is not sent to the mail sender.
Mail is accepted and delivered to the intended receiver.
Change
Recipient
Prefix Subject
Quarantine
Mail is accepted but is not delivered to the receiver for whom the message was originally sent.
Mail is sent to the receiver specified in the spam policy.
Mail is accepted and delivered to the intended receiver but after tagging the subject line.
Tagging content is specified in spam policy.
You can customize subject tagging in such a way that the receiver knows that the mail is a spam mail.
For Example
Contents to be prefixed to the original subject:
‘Spam notification from Cyberoam – ‘
Original subject: ‘This is a test’
Receiver will receive mail with subject line as:
‘Spam notification from Cyberoam - This is a test’
Mail is quarantined and can be viewed or downloaded from the Quarantine Area.
Table
– Manage Actions screen elements
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Cyberoam Anti Spam Configuration Guide
Quarantine
Quarantine Digest is an Email and contains a list of quarantined messages filtered by Cyberoam and held in the user Quarantine Area. If configured, Cyberoam mails the Quarantine Digest as per the configured frequency to the user. Digest provides a link to User My Account from where user can access his quarantined messages and take the required action.
Note
Entire Quarantine menu is not available for Cyberoam CR15i models.
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Cyberoam Anti Spam Configuration Guide
Quarantine Digest Settings
Digest service can be configured globally for all the users or for individual users.
User receives Quarantine Digest as per the configured frequency.
The Quarantine Digest provides following information for each quarantined message:
Date and time: Date and time when message was received
Sender: Email Address of the sender
Recipient: Email Address of the receiver
Subject: Subject of the message
To manage Spam Digest, go to Anti Spam > Quarantine > Quarantine Digest
Settings. You can:
Change User’s Quarantine Digest Settings
Manage User’s Quarantine Digest Settings
Configure Quarantine Digest
Screen
– Spam Digest Settings
Screen Elements Description
Quarantine Digest Settings (Spam Digest Settings will be applicable only after you
subscribe for "Gateway Anti Spam" module.)
Enable
Digest
Quarantine
Email Frequency
From Email Address
Enable Quarantine Digest to configure digest service for all the users.
Specify the Quarantine Digest mail frequency.
Digest can be mailed every hour, every day at configured time or every week on the configured day and time.
Specify Email Address from which the mail should be sent.
Digest mail will be sent from the configured mail address.
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Display Name
Send Test Email
Cyberoam Anti Spam Configuration Guide
Specify mail sender name. Digest mail will be sent with the configured name.
Click “Send Test Email” button and provide Email Address to which the message is to be sent for Email Address verification i.e. Email Address is valid or not.
Reference “My Account
IP”
Allow Override
Change
Quarantine
Settings
User’s
Digest
Select Interface/Port IP from the ‘Reference “MyAccount”
IP dropdown list.
User My Account link in Digest mail will point to this IP
Address. User can click the link to access his quarantined messages and take the required action. The users not falling under the specified Interface will have to access the quarantined mail directly from their MyAccount.
Enable “Allow User To Override Digest Settings”; if you want each user to override the digest setting i.e. user can disable the digest service so that they do not receive the
Quarantine Digest.
Click
“Change User’s Quarantine Digest Settings” button to change the digest setting of the individual users. It allows selecting group and updating the Quarantine Digest
Setting of group members.
Table
– Quarantine Digest screen elements
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Cyberoam Anti Spam Configuration Guide
Change User’s Quarantine Digest Settings
Click “Change User’s Quarantine Digest Settings” button to change the digest settings of the individual users. It opens a new page which allows you to search groups and users for updating the Quarantine Digest Settings of group members.
You can individually search for user and user groups.
Select the checkbox against the user to enable the Quarantine Digest. If enabled, configured
Quarantine Digest Settings are applicable for the user.
Screen
– Change User’s Spam Digest Settings
Manage User’s Quarantine Digest Settings
Screen Elements
User Name
Name
Group
Edit Icon
Description
Displays username.
Displays a name for the User.
Displays Group name.
Displays Email Address.
Edit Quarantine Digest.
To save the modifications done for Email Address, click
Save icon and to cancel the modifications done click
Cancel icon .
Table
– Manage Change User’s Spam Digest
Select the checkbox against the user to enable the Spam Digest. If enabled, configured Spam
Digest Settings are applicable for the user.
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Cyberoam Anti Spam Configuration Guide
Quarantine Area
Under Quarantine Area, Quarantined Mails can be searched based on sender Email Address, receiver Email Address, and subject.
Use
“Filter” section to search for mails from the list of Quarantined Mails. To view and release the
Quarantined Mails go to, Anti Spam > Quarantine > Quarantine Area.
Cyberoam reserves 5GB for Quarantine Area. Once the quarantine repository is full, older Emails are purged.
Screen
– Manage Quarantine Mails
Screen Elements
Filter Result
Start Date
End Date
Sender
Receiver
Filter
Clear
Subject
Sender
Recipient
Subject
Time Stamp
Rule Name
Release Icon
Description
Select the starting date from Calendar by clicking on
Calendar icon
Select the ending date from Calendar by clicking on
Calendar icon
Specify a name for the Sender.
Specify a name for the Receiver.
Click “Filter” to search mails from the list of Quarantined
Mails.
Click “Clear” to reset the details of Filter Result.
Specify a Subject.
Displays the Sender of the Mail.
Displays the Recipient of the Mail.
Displays the Mail Subject.
Timestamp when the mail was received.
Displays a Rule name based on which the Quarantine
Mail is considered as Spam.
Click on the Release Icon to move the mails from
Quarantine A rea to recipient’s inbox. Log color will change when the selected mail is released to the recipient’s inbox.
Table
– Manage Quarantine Mails screen elements
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Cyberoam Anti Spam Configuration Guide
Release Quarantined Mails
Either Administrator or user himself can release the Quarantined Mails. Administrator can release the Quarantined Spam Mails from Quarantine Area while user can release from his
‘My Account’.
Released Quarantined M ails are delivered to the intended recipient’s inbox.
Screen
– Before Releasing Quarantine Mails
When the selected mail is released to the recipient’s inbox, the log color will change from Violet color to black color as shown in the Screen below.
Screen
– After Releasing Quarantine Mails
Administrator can access Quarantine Area from Anti Spam > Quarantine > Quarantine
Area, while user can logon to My Account and access Quarantine Area from Quarantine
Mails > Spam > Quarantine Emails.
If Quarantine Digest is configured, user will be mailed Digest everyday which consists of all the
Quarantined Mails.
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Cyberoam Anti Spam Configuration Guide
Trusted Domain
Cyberoam also allows bypassing RBL scanning of mails from the certain domains. For this, you have to define the domains as the trusted domains. FQDN can also be configured as trusted domain.
To manage local domains, go to Anti Spam > Trusted Domain > Trusted Domain. You can:
Add
– Specify the Domain name and click the Add Button. Mails from the specified domains will not be scanned.
Delete
– Click the Delete icon
in the Manage column against a Domain to be deleted. A dialog box is displayed asking you to confirm the deletion. Click OK to delete the Domain. To delete multiple domains, select them and click the Delete button.
Screen
– Add/Remove Trusted Domain
View the list of Trusted Domains
Screen Element
Add Button
Domain Name
Delete Button
Description
Add a new Trusted Domain.
Displays a name for the Trusted Domain.
Delete the Trusted Domain.
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