
Chapter 22 Content Filtering
ZyWALL (ZLD) CLI Reference Guide
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Figure 24 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 . 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 . The ZyWALL
blocks, blocks and logs or just logs the request based on your configuration.
3 Use the Anti-X > Content Filter screen to configure how long a web site address
remains in the as well as view those web site addresses. All of the web site address
records are also cleared from the local when the ZyWALL restarts.
4 If the ZyWALL has no record of the web site, it queries the external content filtering
database and simultaneously sends the request to the web server.
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 based on the settings in
the content filtering profile. The web site’s address and category are then stored in the
ZyWALL’s content filtering .
22.4 Content Filtering Reports
See the web configurator User’s Guide to see how to view content filtering reports after you
have activated the category-based content filtering subscription service.
22.5 Content Filter Command Input Values
The following table explains the values you can input with the content-filter commands.
Table 107 Content Filter Command Input Values
LABEL DESCRIPTION
policy_number The number of the policy <0 - X > where X depends on the number of content
filtering policies the ZyWALL model supports. See the CLI help for details.
address The name (up to 63 characters) of an existing address object or group to
which the policy should be applied.
schedule The name (up to 63 characters) of an existing schedule to control when the
policy should be applied.
filtering_profile The filtering profile defines how to filter web URLs or content. You may use 1-
31 alphanumeric characters, underscores(
_), or dashes (-), but the first
character cannot be a number. This value is case-sensitive.
category_number The number of a web category <0…60>. Each number corresponds to a
category name.
category_name The name of a web category (see Table 108 on page 204).
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