ZyXEL Communications 2 Plus User Manual

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 Chapter 4 Tutorials
ZyWALL 2 Plus User’s Guide
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Click SECURITY > CONTENT FILTER
Enable the content filter and external database content filtering.
Click Apply.
Figure 78   SECURITY > CONTENT FILTER > General
4.5.2  Block Categories of Web Content
Here is how to block access to web pages by category of content. 
Click SECURITY > CONTENT FILTER > Policy and then the external database icon 
next to the default policy.