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Cisco IronPort AsyncOS 7.5.7 for Web User Guide
Chapter 18      URL Filters
Filtering Transactions Using URL Categories
Note
If you want to block a particular URL category for HTTPS requests, choose to decrypt that URL 
category in the Decryption Policy group and then choose to block the same URL category in the 
Access Policy group.
Step 5
In the Uncategorized URLs section, choose the action to take for client requests to web sites that do not 
fall into a predefined or custom URL category. 
This setting also determines the default action for new and merged categories resulting from URL 
category set updates. For details, see 
You can choose any action listed in 
Step 6
Submit and commit your changes.
Configuring URL Filters for Data Security Policy Groups
You can configure URL filtering for user defined Data Security Policy groups and the Global Policy 
Group.
To configure URL filtering in a Data Security Policy group:
Step 1
Navigate to the Web Security Manager > Cisco IronPort Data Security page.
Step 2
Click the link in the policies table under the URL Categories column for the policy group you want to 
edit.
The Cisco IronPort Data Security Policies: URL Categories: policyname page appears.
Decrypt
Allows the connection, but inspects the traffic content. The appliance decrypts the 
traffic and applies Access Policies to the decrypted traffic as if it were a plaintext 
HTTP connection. By decrypting the connection and applying Access Policies, you 
can scan the traffic for malware. You might want to decrypt connections to third 
party email providers, such as gmail or hotmail. 
For more information about how the appliance decrypts HTTPS traffic, see 
.
Drop
Drops the connection and does not pass the connection request to the server. The 
appliance does not notify the user that it dropped the connection. You might want to 
drop connections to third party proxies that allow users on the network bypass the 
organization’s acceptable use policies.
Table 18-4
URL Category Filtering for Decryption Policies (continued)
Action
Description