By default, InterScan™ Messaging Security Appliance (IMSA) includes a Global Antivirus rule to help protect your network from viruses and related Internet threats. Because an antivirus rule addresses the most critical and potentially damaging types of messages, you should always keep it in the first position on the rule list so IMSA can analyze traffic for virus content first.
The antivirus rule does not protect against spam. For the best protection against spam, configure a custom rule that includes spam in the scanning conditions, and activate the IP Filtering product (sold separately).
You can create the following two (2) types of policies in IMSA to protect your network against various threats:
Antivirus—Scans messages for viruses and other malware such as spyware and worms.
Others—Scans spam or phishing messages, message content, and other attachment criteria.
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Before creating a new policy, ensure that you have defined the internal addresses. |
There are four steps to creating an IMSA policy:
Specifying a route.
Specifying scanning conditions.
Specifying actions.
Specifying priority.
To go to the Policy screen, choose Policy > Policy List from the menu. Use the Policy screen to do the following:
To quickly create a new rule with settings very similar to an existing rule, use the copy feature.
To copy a rule:
Next to the rule to copy, select the check box.
Click Copy.
Next to the rule to delete, select the check box.
Click Delete.
The policy screen shows all the rules that you configured in the order that IMSA uses them to filter traffic. Note the following symbols that may appear on the Status column:
Green check mark represents active rules.
Red X symbol represents rules that are saved but inactive.
Gray check mark represents enabled rule but inactive AC.
Gray X symbol represents rules and AC that are inactive.
If too many rules appear in the list, you can filter the list according to the following:
Routes—Incoming, Outgoing, Both directions, POP3, or All routes
Types—Viruses and malware, Spam/phishing emails, Attachments, Content, Size, or Other
Groups—Any user or any group you created. You can also search for a user or group.
To filter the list:
Next to Filter by, select the routes, rule types, and users or groups from the drop down lists.
Click OK.
See also: