Chapter 12 Content Filtering Screens

Table 62 SECURITY > CONTENT FILTER > Object (continued)

LABEL

DESCRIPTION

Forbidden Web Site List

Sites that you want to block access to, regardless of their content

 

rating, can be allowed by adding them to this list. You can enter up to

 

32 entries.

 

 

Add Forbidden Web Site

Enter host names such as www.bad-site.com into this text field. Do not

 

enter the complete URL of the site – that is, do not include “http://”. All

 

subdomains are blocked. For example, entering “bad-site.com” also

 

blocks “www.bad-site.com”, “partner.bad-site.com”, “press.bad-

 

site.com”, etc.

 

 

Forbidden Web Sites

This list displays the forbidden web sites already added.

 

 

Add

Click this button when you have finished adding the host name in the

 

text field above.

 

 

Delete

Select a web site name from the Forbidden Web Site list, and then

 

click this button to delete it from that list.

 

 

Keyword Blocking

Keyword Blocking allows you to block websites with URLs that

 

contain certain keywords in the domain name or IP address.

 

See Section 12.10 on page 242 for how to set how much of the URL the

 

ZyWALL checks.

 

 

Add Keyword

Enter a keyword (up to 31 printable ASCII characters) to block. You can

 

also enter a numerical IP address.

 

 

Keyword List

This list displays the keywords already added.

 

 

Add

Click this button when you have finished adding the key words field

 

above.

 

 

Delete

Select a keyword from the Keyword List, and then click this button to

 

delete it from that list.

 

 

Apply

Click Apply to save your changes back to the ZyWALL.

 

 

Reset

Click Reset to begin configuring this screen afresh.

 

 

12.10 Customizing Keyword Blocking URL Checking

You can use commands to set how much of a website’s URL the content filter is to check for keyword blocking. See the appendices for information on how to access and use the command interpreter.

12.10.1 Domain Name or IP Address URL Checking

By default, the ZyWALL checks the URL’s domain name or IP address when performing keyword blocking.

This means that the ZyWALL checks the characters that come before the first slash in the URL.

For example, with the URL www.zyxel.com.tw/news/pressroom.php, content filtering only searches for keywords within www.zyxel.com.tw.

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ZyWALL 2 Plus User’s Guide