ZyXEL Communications 100 Series, 200 Series manual 549

Chapter 31 Content Filtering

3Use the Content Filter Cache screen to configure how long a web site address remains in the cache as well as view those web site addresses (see Section 31.7 on page 546). All of the web site address records are also cleared from the local cache when the ZyWALL restarts.

4If the ZyWALL has no record of the web site, it queries the external content filter database and simultaneously sends the request to the web server.

5The external content filter server sends the category information back to the ZyWALL, 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 ZyWALL’s content filter cache.

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ZyWALL USG 100/200 Series User’s Guide