Citrix Systems 9.2 Benutzerhandbuch

With the rewrite feature, you can modify any part of an HTTP header, and, for 
responses, you can modify the HTTP body. You can use this feature to 
accomplish a number of useful tasks, such as removing unnecessary HTTP 
headers, masking internal URLs, redirecting Web pages, and redirecting queries 
or keywords.

In the following examples, you first create a rewrite action and a rewrite policy. 
Then you bind the policy globally.

This example describes how to create a Rewrite action and Rewrite policy that 
redirects an external URL to an internal URL. You create an action, called 
act_external_to_internal, that performs the rewrite. Then you create a policy 
called pol_external_to_internal

To create the rewrite action, at the NetScaler command prompt, type: