The Override List

You can create an override list of URLs that should be either always vended or never vended. The override list always takes precedence over any conditions specified in your filtering services, but it does not affect requests from IP addresses in the bypass list.


Creating an Override List

To add entries to the override list, do the following:

  1. In the browser-based management tool, click Cache > Filtering > Insert under Override List.

  2. Enter the URL or IP address mask you want to add to the list.

    Use the asterisk (*) wildcard character to limit or broaden the effect. See Critical Information about Wildcards in the Override List below for help.

  3. Click the Allow drop-down list > select Always or Never.

    Always will always vend the page; Never will never vend the page.


Critical Information about Wildcards in the Override List

An asterisk (*) wildcard in the override URL mask causes the appliance to interpret everything between the asterisk and the following delimiter as a wildcard.

Delimiters include the forward slash (/), the period (.), and the colon (:).

The appliance automatically appends http:// at the beginning of the URL mask. For example, the mask *.*.edu would instruct the appliance to allow URLs such as the following to bypass filtering.

http://www.*.edu
http://ww1.*.edu
http://*.*.edu/*

Asterisks must be used with caution. Otherwise, you could allow undesirable content to bypass filtering. For example, some education sites contain personal pages which would be undesirable in certain environments.

When defining override URL masks, be specific and include as much of the complete path as possible.

IMPORTANT:  Do not include asterisks in the protocol indicator (scheme) of override list URLs.

For example, the protocol indicator http*:// is invalid.

If you include an asterisk in the protocol indicator, you can only remove the entry by clearing the entire override list.