By default, TCP/IP forwarding is turned off (disabled) in Windows Server 200x (2000/2003/2003 R2/2008/2008 R2 at the time of this writing). This article describes how to enable TCP/IP forwarding on a Windows Server 200x-based computer. Here is an example that you can reference: Step 1: Define the IP scheme for the two segmentsSegment 1 – 192.168.0.0/24Segment 2 – 192.168.1.0/24*** /24 is an alternate notation when representing the subnet mask of 255.255.255.0. Step 2: Configure the Windows Server’s network adapters with IP addresses and other TCP/IP settings. For example, one adapter’s address may be configured to 192.168.0.254/24 while the second adapter may be configured to 192.168.1.254/24. Step 3: Configure the computers on each segment to use the Server’s adapters as their default gateway address. Step 4: Enable IP Forwarding on the Windows Server via the registry. Start the Registry Editor (Regedit.exe). In Registry Editor, locate the following registry key: A value of 1 enables TCP/IP forwarding for all network connections that are installed and used by this computer. Step 5: Quit Registry Editor. Step 6: Restart the Windows Server.
