Cisco Cisco Web Security Appliance S360 User Guide

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Figure 6-3 Defining Policy Group Membership by User Agent
On this page, you can select as many user agents as desired. The web interface includes some 
of the more common user agents that you can select using a check box. You can also type a 
regular expression to define any user agent necessary.
For each user agent you select in the Common User Agents section, AsyncOS for Web creates 
a regular expression to define the user agent. However, if you select the All Versions option 
for each browser type, AsyncOS for Web creates a single regular expression that represents all 
versions of that browser instead an expression for each version. Creating one regular 
expression instead of multiple increases performance. 
For example, when you select “Version 2.X” and “Version 1.X or earlier” for Firefox, AsyncOS 
for Web uses the following regular expressions:
Firefox/2
Firefox/1
 
However, when you select “All Versions” under Firefox, AsyncOS uses the following regular 
expression:
Firefox
 
Also, you can configure the policy group membership to either match the user agents you 
define, or matching all other user agents than the ones defined.