Content Filter General Screen; Figure 182 Content Filtering Lookup Procedure - ZyXEL Communications ZYWALL 35 User Manual

Chapter 16 Content Filtering Screens

Figure 182 Content Filtering Lookup Procedure

1 A computer behind the ZyWALL tries to access a web site.
2 The 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.
3 Use 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
340). All of the web site address records are also cleared from the local cache when the
ZyWALL restarts.
4 If 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.
5 The 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.

16.3 Content 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
account, register your device and activate the external content filtering service.
322
Chapter 5 on page 141) to create a myZyXEL.com
ZyWALL 5/35/70 Series User's Guide
Section 16.10 on page