by   May 18 2011   
TCP / IP Forwarding for Windows XP

TCP / IP Forwarding for Windows XP

Always backup your System Registry before making changes to your registry. How to Backup your Registry.

Clip from Microsoft KB: KB 315236

OpenVPN KB
(If setting up OpenVPN)

START:
To enable TCP/IP forwarding, follow these steps:

1. Start Registry Editor (Regedit.exe).
2. In Registry Editor, locate the following registry key:
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\Tcpip\Parameters
3. Set the following registry value:
Value Name: IPEnableRouter
Value type: REG_DWORD
Value Data: 1
A value of 1 enables TCP/IP forwarding for all network connections that are installed and used by this computer.
4. Quit Registry Editor.

TCP / IP Forwarding for Windows XP