Dynamic Content Filtering Flow - D-Link NetDefend DFL-210 User Manual

6.3.4. Dynamic Web Content Filtering
community, such as a group of university students, often surfs to a limited range of websites.
Figure 6.7. Dynamic Content Filtering Flow
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 dynamic filtering 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 parts of websites 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
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