Cisco Cisco Web Security Appliance S170 사용자 가이드
17-9
Cisco IronPort AsyncOS 7.7.5 for Web User Guide
Chapter 17 URL Filters
Filtering Transactions Using URL Categories
Look at the “Cisco IronPort Web Usage Controls - Web Categorization Categories List” item in the
Acceptable Use Controls Engine Updates table.
Acceptable Use Controls Engine Updates table.
Step 3
To update, click Update Now.
Choosing Default Settings for New and Changed Categories
URL category set updates may change the behavior of your existing policies. You should specify default
settings for certain changes when you configure your policies, so that they are ready when URL category
set updates occur.
settings for certain changes when you configure your policies, so that they are ready when URL category
set updates occur.
When new categories are added, or existing categories merge into a new category, the default action for
these categories for each policy are affected by the Uncategorized URLs setting in that policy. To choose
settings that will meet your needs, review the information for new and merged categories in the
these categories for each policy are affected by the Uncategorized URLs setting in that policy. To choose
settings that will meet your needs, review the information for new and merged categories in the
To verify existing settings and/or make changes, click the URL Filtering link for each Access Policy,
Decryption Policy, and Cisco IronPort Data Security policy, and check the selected setting for
Uncategorized URLs.
Decryption Policy, and Cisco IronPort Data Security policy, and check the selected setting for
Uncategorized URLs.
Ensuring that You Receive Alerts About Category and Policy Changes
Category set updates trigger two types of alerts: Alerts about category changes and alerts about policies
that have changed or been disabled as a result of category set changes.
that have changed or been disabled as a result of category set changes.
To verify that you will receive alerts about URL category set updates, go to System Administration >
Alerts and make sure you will receive Warning-level alerts in the System category. More information
about alerts is in
Alerts and make sure you will receive Warning-level alerts in the System category. More information
about alerts is in
.
Responding to Alerts about URL Category Set Updates
When you receive an alert about category set changes, you should do the following:
•
Check policies and identities to be sure that they still meet your policy goals after category merges,
additions, and deletions, and
additions, and deletions, and
•
Consider modifying policies and identities to benefit from new categories and the added granularity
of split categories.
of split categories.
to guide
your review of your policies and identities.
Filtering Transactions Using URL Categories
The URL filtering engine configured allows you to filter transactions in Access, Decryption, and Data
Security Policies. To configure URL filtering in a policy group, click the link in the policies table under
the URL Categories column for the policy group you want to edit. For more information about the
policies table, see
Security Policies. To configure URL filtering in a policy group, click the link in the policies table under
the URL Categories column for the policy group you want to edit. For more information about the
policies table, see