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How To Enable TCP/IP Forwarding in Windows Server 2003

Article ID: 323339 - View products that this article applies to.

This article was previously published under Q323339

SUMMARY

By default, TCP/IP forwarding is turned off (disabled) in Windows Server 2003. This article describes how to enable TCP/IP forwarding on a Windows Server 2003-based computer.

More Information

Enabling TCP/IP Forwarding

Important This section, method, or task contains steps that tell you how to modify the registry. However, serious problems might occur if you modify the registry incorrectly. Therefore, make sure that you follow these steps carefully. For added protection, back up the registry before you modify it. Then, you can restore the registry if a problem occurs. For more information about how to back up and restore the registry, click the following article number to view the article in the Microsoft Knowledge Base:

322756

(http://support.microsoft.com/kb/322756/ )

How to back up and restore the registry in Windows

Start Registry Editor (Regedit.exe).
Locate and click the following key in the registry:

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\Tcpip\Parameters
Set the following registry values:

Value Name: IPEnableRouter
Value type: REG_DWORD
Value Data: 1

NOTE: A value of 1 turns on (enables) TCP/IP forwarding for all network connections installed and used by this computer.
Quit Registry Editor.