Redirecting Specific URLs and Protocols with Server to Client Content Redirection.


This article contains information about Redirecting Specific URLs and Protocols with Server to Client Content Redirection.


When using the server-to-client function, Independent Computing Architecture (ICA) users click a URL within an ICA session to start Internet Explorer locally on the workstation.

By default, server-to-client content redirection redirects all or none of the following file types:

  • http

  • https

  • rtsp

  • rtspu

  • pnm

  • mms

There are enhancements available from MetaFrame Presentation Server 3.0 Hotfix Rollup Pack 2, Hotfix MPSE300W2K3R02, which allows the administrators to limit the list of protocols to be redirected from server to client.

A registry key is specified to enable certain file types to be excluded from content redirection. If the HKEY_LOCAL_MACHINE \SOFTWARE\Citrix\SFTA \DisableServerFTA registry key is set, the multi-string registry value of the HKEY_LOCAL_MACHINE\SOFTWARE \Citrix\SFTA\NoRedirectClasses registry key specifies which file types are excluded from redirection. If the protocol is not in the list, it is redirected.

Note: For 64 bit platforms, you must use the HKLM\Software\Wow6432Node\Citrix\SFTA registry key.


To implement this enhancement, make the following value changes to the registry key using regedt32:

Caution! Refer to the Disclaimer at the end of this article before using Registry Editor.

    Name: DisableServerFTA
    Type: REG_DWORD
    Data: 1

  • Name: NoRedirectClasses
    Type: REG_MULTI_SZ
    Data: Specify any combination of the following values: http, https, rtsp, rtspu, pnm, or mms

Note: The values must be line-delimited, for example:

  • http

  • https

  • rtsp

There is another enhancement that enables you to redirect specific URLs from server to client, without redirecting other URLs. Using the following registry key, you can specify URLs to be redirected from server to client:


Note: When using the valid site enhancement, do not use the disableserverfta and noredirectclasses registry keys. These two enhancements do not work together. When specifying sites with the valid sites registry key, all the URLs that are not in the list, open in the server.

To implement this enhancement, make the following value changes in the registry key by using the Registry Editor Window:

Name: ValidSites
Data: <Specify_any_Combination_of_URLs>

Note: The values for the Data field must be line-delimited.

The following is a same value for the Data field:


Note: The asterisk (*) is supported as a wildcard character. Additionally, when adding the ValidSites registry key to redirect specific URLs from server to client, ensure that you specify the URLs without http://, as specified in the preceding example.


Caution! Using Registry Editor incorrectly can cause serious problems that might require you to reinstall your operating system. Citrix cannot guarantee that problems resulting from the incorrect use of Registry Editor can be solved. Use Registry Editor at your own risk. Be sure to back up the registry before you edit it.

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