Web Gateway 7.1.5 Product Guide - McAfee

Modify a filtering rule to block uncategorized URLs
You can modify a filtering rule that allows uncategorized URLs to let it block these URLs.
1 Go to Policy | Rule Sets.
Web filtering
URL filtering 6
2 On the rule sets tree, select the rule set that contains rules for URL filtering, for example, the default
URL Filtering rule set. The rules appear on the settings pane.
3 Select the rule Allow uncategorized URLs and click Edit. The Edit Rule window opens.
4 Select Action and from the list of actions, select Block.
5 Select Name and in the Name field type Block in the place of the word Allow.
6 Click Finish. The window closes and the modified rule appears on the settings pane.
7 Click Save Changes.
The modifed rule uses the same criteria as the default rule to detect uncategorized URLs. However,
instead of allowing them, it blocks them. It also stops the processing of all other rules and sends a
block message to the user who requested access to the URL. Processing continues when the next user
request is received on the appliance.
If you want to keep the default rule (in disabled state), use the Copy and Paste buttons above the list of
rules to copy the default rule and apply your modifications to the copied rule.
The Move up and Move down buttons allow you to move the additional rule to the appropriate position,
which should be immediately before or after the old rule.
By selecting or deselecting the Enabled checkbox in each rule line, you can easily switch between the
rules if a change in your web security policy should require it.
Whitelist and blocking lists for URL filtering
You can maintain different lists for use by the URL filtering rules. This section provides information on
how this is done and describes some sample lists.
The URL filtering rules use the following types of lists:
• URL whitelist — List of wildcard expressions
URLs that match these expressions are allowed by a whitelisting rule to skip URL filtering.
• URL category blocking list — List of URL categories
URLs that belong to these categories are blocked by a blocking rule.
• URL blocking list — Lists of wildcard expressions
URLs that match these expressions are blocked by a blocking rule.
The procedures used to maintain URL filter lists differ according to the list type. For example, to add
URL categories to a category blocking list, you select them from category folders.
Adding entries to a whitelist for individual URLs is done in the same way as for a virus and malware
filtering whitelist. You enter wildcard expressions onto the list that URLs will eventually match or not.
Adding entries to a blocking list for individual URLs is also done in this way.
For more information on these lists, see Sample lists for URL filtering.
For information on adding entries to blocking lists and whitelists, see Add a URL category to a blocking
list and Add a wildcard expression to a virus and malware filtering whitelist for URLs.
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