Chapter 27 Content Filter
ZyWALL ATP Series User’s Guide
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The following table describes the managed categories.
Action When Category
Server Is Unavailable
Select
Pass
to allow users to access any requested web page if the external
content filtering database is unavailable.
Select
Block
to block access to any requested web page if the external content
filtering database is unavailable.
Select
Warn
to display a warning message before allowing users to access any
requested web page if the external content filtering database is unavailable.
The following are possible causes for the external content filtering server not being
available:
• There is no response from the external content filtering server within the time
period specified in the
Content Filter Server Unavailable Timeout
field.
• The Zyxel Device 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.
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.
Managed Categories
These are categories of web pages based on their content. Select categories in
this section to control access to specific types of Internet content.
You must have the Category Service content filtering license to filter these
categories. See the next table for category details.
Test Web Site Category
URL to test
You can check which category a web page belongs to. Enter a web site URL in
the text box.
When the content filter is active, you should see the web page’s category. The
query fails if the content filter is not active.
Content Filtering can query a category by full URL string (for example, http://
www.google.com/picture/index.htm), but HTTPS Domain Filter can only query a
category by domain name ('www.google.com'), so the category may be
different in the query result.
URL to test
displays both results in the test.
If you think the category is
incorrect
Click this link to see the category recorded in the Zyxel Device’s content filtering
database for the web page you specified (if the database has an entry for it).
Test Against Content Filter
Category Server
Click this button to see the category recorded in the external content filter server’s
database for the web page you specified.
OK
Click
OK
to
save your changes back to the Zyxel Device.
Cancel
Click
Cancel
to exit this screen without saving your changes.
Table 208 Managed Category Descriptions
CATEGORY
DESCRIPTION
Advertisements & Pop-Ups
Sites that provide advertising graphics or other ad content files such as banners
and pop-ups. For example, pagead2.googlesyndication.com,
ad.yieldmanager.com.
Alcohol & Tobacco
Sites that promote or sell alcohol- or tobacco-related products or services. For
example, www.drinks.com.tw, www.p9.com.tw, beer.ttl.com.tw.
Table 207 Configuration > Security Service > Content Filter > Profile > Add > Category Service
LABEL
DESCRIPTION
