ZyXEL Communications ADSL 2+ Security Gateway, User Manual

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ZyWALL 2 Plus User’s Guide
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H A P T E R
12
Content Filtering Screens
This chapter provides an overview of content filtering.
12.1 Content Filtering Overview
Content filtering allows you to block certain web features, such as Cookies, and/or block
access to specific websites. With content filtering, you can do the following:
12.1.1 Restrict Web Features
The ZyWALL can block web features such as ActiveX controls, Java applets, cookies and
disable web proxies.
12.1.2 Create a Filter List
You can select categories, such as pornography or racial intolerance, to block from a pre-
defined list.
12.1.3 Customize Web Site Access
You can specify URLs to which the ZyWALL blocks access. You can alternatively block
access to all URLs except ones that you specify. You can also have the ZyWALL block access
to URLs that contain key words that you specify.
12.2 Content Filtering with an External Database
When you register for and enable external database content filtering, your ZyWALL accesses
an external database that has millions of web sites categorized based on content. You can have
the ZyWALL block, block and/or log access to web sites based on these categories. The
content filtering lookup process is described below.