User Manual Part 2

Overview
Chapter 16: Using Web Content Filtering 527
Chapter 16
This chapter explains how to use Web content filtering.
This chapter includes the following topics:
Overview..................................................................................................527
Using Web Rules......................................................................................529
Using Web Filtering.................................................................................537
Customizing the Access Denied Page ......................................................543
Overview
You can allow or block users from accessing Web content, by configuring Web rules
and/or the Web Filtering service. The following table describes the main differences
between Web rules and the Web Filtering service:
Table 115: Comparison of Web Content Filtering Methods
Web Rules Web Filtering
Filtering Action
Web rules allow and block
specific URLs.
The Web Filtering service is category
based; that is, it filters Web sites based
on the category to which they belong.
Point of Enforcement
HTTP requests are analyzed in
the gateway, by comparing each
request against a list of rules.
HTTP requests are analyzed in the
gateway, by extracting each request's URL
and then sending the URL to the Service
Center, to determine to which categories
the URL belongs. The request is then
allowed or denied according to the
configured list of allowed categories.
Using Web Content Filtering