Chapter 33 Content Filtering
UAG Series User’s Guide
394
Figure 266 Content Filter Lookup Procedure
1 A computer behind the UAG tries to access a web site.
2 The UAG looks up the web site in its cache. If an attempt to access the web site was made in the
past, a record of that web site’s category will be in the UAG’s cache. The UAG blocks, blocks and
logs or just logs the request based on your configuration.
3 If the UAG has no record of the web site, it queries the external content filter database and
simultaneously sends the request to the web server.
4 The external content filter server sends the category information back to the UAG, which then
blocks and/or logs access to the web site based on the settings in the content filter profile. The web
site’s address and category are then stored in the UAG’s content filter cache.
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