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Content Filtering – Web Filters
12.1 Demands
1.
Someone (PC1_1) is browsing the web pages at the WebServer3. The contents of the web pages may include cookies, Java
applets, Javascripts, or Active-X objects that may contain malicious program of users' information.
2.
Someone (PC1_1) is browsing forbidden web pages on office hours. The contents of the web pages may include stock
markets, violence, or sex that will waste the bandwidth of the Internet access link while degrading the efficiency of normal
working hours.
Figure 12-1 Use web filter functionality to avoid users view the forbidden pages or web site
12.2 Objectives
1.
Remove the cookies, Java applet, Javascripts, Active-X objects from the web pages.
2.
Prevent users from connecting to the forbidden sites.
12.3 Methods
1. Setup content filtering for web objects such as cookies and Java applets.
2.
Setup content filtering for URL requests. For each URL, check the pre-defined upgradeable URL database, self-entered
forbidden domains, and self-entered keywords to check if the URL is allowed.
Content Filtering – Web Filters
This chapter introduces web content filters and explains how to implement it.
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DFL-900 User Manual
Chapter 12
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