InterScanTM Messaging Security Virtual Appliance - Online Help ...

Trend Micro InterScan Messaging Security Virtual Appliance Administrator’s Guide
16-20
3. Click Next to continue configuring the policy.
To configure Web Reputation settings:
1. Create or modify an "Other" (not an Antivirus) policy.
• For information on creating a new rule, see Adding Policies on page 16-2.
• For information on modifying an existing rule, see Modifying Existing Policies
on page 19-2.
2. Under Web Reputation on the Scanning Conditions screen, click Web Reputation
settings. The Web Reputation Settings screen appears.
3. Select one of the following catch rates or specify a detection threshold.
• High: Blocks more websites embedded in email messages. Select a high
sensitivity level if your clients are visiting too many malicious websites.
• Medium: Blocks an average amount of websites (the default selection).
• Low: Blocks fewer websites embedded in email messages. Select a low
sensitivity level if IMSVA is blocking too many legitimate websites embedded in
email messages.
4. Select the Enable the use of the Web Reputation Approved List check box to
bypass scanning and blocking of domains in the Web Reputation Approved List.
5. Click Save to continue selecting scanning conditions.
Selecting Scanning Conditions for Attachments
IMSVA can filter email traffic based on the files attached to messages.
To specify scanning conditions for attachment names or extensions:
1. Under Attachment on the scanning conditions selection screen, select the check
box next to Name or extension.
2. Click Name or extension. The Attachment Name or Extension screen appears.
3. Next to Select, select one of the following:
• Selected attachment names: IMSVA takes action on email messages with
attachments of the selected names.
• Not the selected attachment names: IMSVA takes action on email messages
with attachments that are not of the selected names.
4. Select the check boxes next to the attachments to scan or not scan.