How To Enable TCP/IP Forwarding in Windows Server 2003 (323339)

For a Microsoft Windows XP version of this article, see 315236.
For a Microsoft Windows 2000 version of this article, see 230082.

IMPORTANT: This article contains information about modifying the registry. Before you modify the registry, make sure to back it up and make sure that you understand how to restore the registry if a problem occurs. For information about how to back up, restore, and edit the registry, click the following article number to view the article in the Microsoft Knowledge Base:

256986 Description of the Microsoft Windows Registry

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SUMMARY
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- Enabling TCP/IP Forwarding

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

WARNING: If you use Registry Editor incorrectly, you may cause serious problems that may require you to reinstall your operating system. Microsoft cannot guarantee that you can solve problems that result from using Registry Editor incorrectly. Use Registry Editor at your own risk.

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.

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