Routing between subnets is disabled by default for the TCP/IP protocol in Windows NT. To enable routing, following these steps:

WARNING: Using Registry Editor incorrectly can cause serious, system-wide problems that may require you to reinstall Windows NT to correct them. Microsoft cannot guarantee that any problems resulting from the use of Registry Editor can be solved. Use this tool at your own risk.

  1. Start Registry Editor (REGEDT32.EXE) and go to the following subkey:

    HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\Tcpip
    \Parameters

  2. From the Edit menu, choose Add Value.
  3. Enter the following values:

    Value Name: IpEnableRouter
    Data Type: REG_DWORD
    Value: 1

  4. Exit Registry Editor and restart Windows NT.