ZyWALL 5/35/70 Series User’s Guide
327
CHAPTER 17
Content Filtering Screens
17.1 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:
• Restrict web features. The ZyWALL can block web features such as ActiveX controls,
Java applets, cookies and disable web proxies.
• Create a filter list. You can select categories, such as pornography or racial intolerance, to
block from a pre-defined list.
• 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.
17.1.1 What You Can Do in the Content Filtering Screens
• Use the General screen (Section 17.2 on page 328) to enable content filtering and
configure external database settings.
• Use the Policy screen (Section 17.2 on page 328) to configure content filtering policies on
your ZyWALL.
• Use the Object screen (Section 17.2 on page 328) to configure lists of allowed and
restricted web sites, and to block web sites based on keywords
• Use the Cache screen (Section 17.2 on page 328) to view and configure caching of URLs
and their categorization.
17.1.2 What You Need to Know About Content Filtering
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.
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