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Old 12-17-2008, 02:13 AM   #1
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How to turn my ethernet card into a router?

I have a computer(A) running bt3 that has two ethernet cards, X and Y. I have an ethernet card(X) that connects to a router(G), which is my gateway to the internet. I have another ethernet card(Y) that runs a crossover ethernet cable to another router(H), which in turn has a regular ethernet cable to another computer(B).

How do I turn my ethernet card(Y) into a router, where it just forwards everything, so that computer (B) can access the internet?

Do I need to use pointtopoint option from ifconfig?

Should I have used regular ethernet cable from ethernet card (Y) to router(H)?

Last edited by trist007; 12-17-2008 at 02:22 AM.
Old 12-17-2008, 02:22 AM   #2
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your system will route if you run "echo 1 > /proc/sys/net/ipv4/ip_forwarding" but that won't really get your job done as you;ll have different subnets needing to added to routing tables all over the place. from here you'd either use IP Masquerading to hide to real address of the computer on B or *bridge* the cards instead of routing them, which is what i'd suggest. (actually i'd suggest just buying a $10 switch and not doing this at all) but if you do want to bridge, you'd want to check out the first half of


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