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Chapter 12 Content Filtering Screens
ZyWALL 2 Plus User’s Guide
216
The following table describes the labels in this screen.
Table 59 SECURITY > CONTENT FILTER > Categories
LABEL DESCRIPTION
Auto Category Setup
Enable External Database
Content Filtering
Enable external database content filtering to have the ZyWALL check an
external database to find to which category a requested web page
belongs. The ZyWALL then blocks or forwards access to the web page
depending on the configuration of the rest of this page.
Matched Web Pages Select Block to prevent users from accessing web pages that match the
categories that you select below.
When external database content filtering blocks access to a web page, it
displays the denied access message that you configured in the
CONTENT FILTER General screen along with the category of the
blocked web page.
Select Log to record attempts to access prohibited web pages.
Unrated Web Pages Select Block to prevent users from accessing web pages that the
external database content filtering has not categorized.
When the external database content filtering blocks access to a web
page, it displays the denied access message that you configured in the
CONTENT FILTER General screen along with the category of the
blocked web page.
Select Log to record attempts to access web pages that are not
categorized.
When Content Filter
Server Is Unavailable
Select Block to block access to any requested web page if the external
content filtering database is unavailable. The following are possible
causes:
There is no response from the external content filtering server within the
time period specified in the Content Filter Server Unavailable Timeout
field.
The ZyWALL is not able to resolve the domain name of the external
content filtering database.
There is an error response from the external content filtering database.
This can be caused by an expired content filtering registration (External
content filtering’s license key is invalid”).
Select Log to record attempts to access web pages that occur when the
external content filtering database is unavailable.
Content Filter Server
Unavailable Timeout
Specify a number of seconds (1 to 30) for the ZyWALL to wait for a
response from the external content filtering server. If there is still no
response by the time this period expires, the ZyWALL blocks or allows
access to the requested web page based on the setting in the Block
When Content Filter Server Is Unavailable field.
Select Categories
Select All Categories Select this check box to restrict access to all site categories listed below.
Clear All Categories Select this check box to clear the selected categories below.
Adult/Mature Content Selecting this category excludes pages that contain material of adult
nature that does not necessarily contain excessive violence, sexual
content, or nudity. These pages include very profane or vulgar content
and pages that are not appropriate for children.
Pornography Selecting this category excludes pages that contain sexually explicit
material for the purpose of arousing a sexual or prurient interest.