The Content Categories - D-Link NetDefend SOHO DFL-160 User Manual

4.6.2. The Content Categories

It is possible to explicitly allow or explicitly block certain URLs by adding one or more Static URL
Filters. This is also referred to as whitelisting and blacklisting and the URLs specified in such filters
are not looked up by the WCF subsystem.
When defining a URL filter it is important to note that wildcarding can be used when specifying the
URL. The wildcard character "*" can represent any sequence of characters in the URL.
For example, the URL filter blacklist *.blocked_site.com will block all pages with URLs that end
with blocked_site.com.
If we want to now explicitly allow one particular page in this domain then this can be done using a
whitelist URL filter of the form ok_page.blocked_site.com. The blacklisting URL filter above will
not prevent this page from being reachable since the whitelist has precedence.
Monitoring WCF
The log messages generated by WCF can be viewed through the Status menu and this is described in
Section 6.4, "Web Content Filtering Status". A graphical summary of WCF activity, shown below,
can be found in the initial display screen which is described in Section 6.1, "System Status".
4.6.2. The Content Categories
Below is a list of all the categories used with WCF and with a description of the purpose of each
category.
Category 1: Adult Content
A web site may be classified under the Adult Content category if its content includes the description
or depiction of erotic or sexual acts or sexually oriented material such as pornography. Exceptions to
this are web sites that contain information relating to sexuality and sexual health, which may be
classified under the Health Sites Category (21). Examples might be:
• www.naughtychix.com
• www.fullonxxx.com
Category 2: News
A web site may be classified under the News category if its content includes information articles on
recent events pertaining to topics surrounding a locality (for example, town, city or nation) or
culture, including weather forecasting information. Typically this would include most real-time
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Chapter 4. The Firewall Menu