Chapter 37 Content Filtering
ZyWALL USG Series User’s Guide
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The following table describes the managed categories.
Security Threat Thees are the categories of web pages that are known to pose a security threat to
users or their computers.
Anonymizers Sites and proxies that act as an intermediary for surfing to other Web sites in an
anonymous fashion, whether to circumvent Web filtering or for other reasons. For
example, blog.go2.tw, anonymizer.com, www.qu365.com.
Compromised Sites that have been compromised by someone other than the site owner in order
to install malicious programs without the user's knowledge. Includes sites that may
be vulnerable to a particular high-risk attack. For example, www.wokoo.net,
movie.sx.zj.cn.
Network Errors Sites that do not resolve to any IP address. A site may not be able to resolve to an
IP address if, for example, the site is no longer available, the site is temporarily
offline, network access to the site is down, the DNS server address record is wrong,
the DNS server has another problem, the site has maintenance/repair work going
on, or the site has been hacked.
Parked Domains Sites that are inactive, typically reserved for later use. They most often do not
contain their own content, may simply say "under construction," "purchase this
domain," or display advertisements. For example, www.moemoon.com, artlin.net,
img.sedoparking.com.
Phishing & Fraud Sites that are used for deceptive or fraudulent purposes (e.g. phishing), such as
stealing financial or other user account information. These sites are most often
designed to appear as legitimate sites in order to mislead users into entering their
credentials. For example, optimizedby.rmxads.com, 218.1.71.226/.../e3b.
Spam Sites Sites that have been promoted through spam techniques. For example,
img.tongji.linezing.com, banner.chinesegamer.net.
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 254 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.
Table 253 Configuration > UTM Profile> Content Filter > Profile > Add > Category Service (continued)
LABEL DESCRIPTION
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