If you install multiple network cards (NICs) in a computer running Windows 2000 Professional there is no really convenient way to enable routing. Yet, if you want the computers on the different networks to be able to talk to each other you need to enable routing on the computer where the multiple network cards are installed. Routing between networks using a software router only works when routing Ethernet networks or Ethernet - USB networks. To route a 802.11b Wireless network you must use an Access Point with a router. To enable TCP/IP Forwarding use the following registry hack: