IP Routing Requires two NICs By default, IP routing is disabled. To enable IP routing, you must allow the computer to forward IP packets it receives. This requires a change to the Windows 2000 system registry. When you enable the Routing and Remote Access service for IP routing, this registry entry is made automatically. HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\Tcpip\Parameters "IPEnableRouter"=1 It is required to reboot Windows 2000 for this change to take effect. I have used this in a configuration, where the Windows 2000 Professional system works as a router between an Ethernet network and a USB-network.