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June 13, 2001 12:00 AM

Multihoming Win2K Pro

Windows IT Pro
InstantDoc ID #21106
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A multihomed system has two NICs so that it can route traffic between two networks. This configuration is possible on Windows 2000 Professional systems only if you've turned on IP forwarding. In Windows NT 4.0, you enable IP forwarding by selecting the Control Panel Network applet, highlighting TCP/IP Protocol on the Protocols tab, clicking Properties, then selecting the Enable IP Forwarding check box on the Routing tab.

This tab and the Enable IP Forwarding check box have disappeared in Win2K, but the functionality still exists. To turn on IP forwarding in Win2K, use a registry editor to open the registry. Under the HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\Tcpip\Parameters subkey, change the value of the IPEnableRouter entry from 0 (the default value) to 1 (enable IP forwarding), then exit the registry.

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Comments
  • Brian Schultz
    11 years ago
    Jul 16, 2001

    You are correct this will enable IP forwarding but to full route TCP/IP between two networks NAT also needs to running and the only way to do with Win2K Pro is to enable Internet Connection Sharing. Unfortunatly there is no way to turn off the Win2k Pro DHCP and IP adressing when ICS is enabled. Please feel free to correct me if I am wrong.
    Thanks,

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