Web Content Filtering Flow - D-Link NetDefendOS User Manual

If the requested web page URL is not present in the databases, then the webpage content at the
URL will automatically be downloaded to D-Link's central data warehouse and automatically
analyzed using a combination of software techniques. Once categorized, the URL is distributed
to the global databases and NetDefendOS receives the category for the URL. Dynamic WCF
therefore requires a minimum of administration effort.
Categorizing Pages and Not Sites
NetDefendOS WCF categorizes web pages and not sites. In other words, a web site may contain
particular pages that should be blocked without blocking the entire site. NetDefendOS provides
blocking down to the page level so that users may still access those pages of a website that are
not blocked by the filtering policy.
WCF and Whitelisting
If a particular URL is whitelisted then it will bypass the WCF subsystem. No classification will be
done on the URL and it will always be allowed. This applies if the URL has an exact match with an
entry on the whitelist or if it matches an entry that makes use of wildcarding.
6.3.4.2. Setting Up WCF
Figure 6.9. Web Content Filtering Flow
Note: New URL submissions are done anonymously
New, uncategorized URLs sent to the D-Link network are treated as anonymous
submissions and no record of the source of new submissions is kept.
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Chapter 6: Security Mechanisms