ZyXEL Communications 2 Plus 12.3Content Filter General Screen

Chapter 12 Content Filtering Screens

Figure 150 Content Filtering Lookup Procedure

1A computer behind the ZyWALL tries to access a web site.

2The ZyWALL 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 ZyWALL’s cache. The ZyWALL blocks, blocks and logs or just logs the request based on your configuration.

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 12.11 on page 243). 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 will query the external content filtering database and simultaneously send the request to the web server.

The external content filtering database may change a web site’s category or categorize a previously uncategorized web site.

5The external content filtering server sends the category information back to the ZyWALL, which then blocks and/or logs access to the web site. The web site’s address and category are then stored in the ZyWALL’s content filtering cache.

12.3Content Filter General Screen

Click SECURITY > CONTENT FILTER to open the CONTENT FILTER General screen.

Use this screen to enable content filtering and configure general settings. You must register for external content filtering before you can use it. Use the REGISTRATION screens (see Chapter 5 on page 127) to create a myZyXEL.com account, register your device and activate the external content filtering service.

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	ZyWALL 2 Plus User’s Guide