Does anyone know how to setup linux box as a network router. I have looked around for source, but seems like there is no lead. Can anyone help?

Try freesco.

Screw that, use BSD. OpenBSD is probably the best of them, because default install, only has about 10 - 15 procs running. You don't need about 3 or 4 of them, all you need for services, is SSH. You can run dhclient, if u don't have a static ip.. and lets see, thats about it, take you maybe 2 hours to setup completely... including adding PF and NAT rules, which is about all ya gotta do. Anyways, good luck if you stick with the linux way.

Zebra is excellent, and provides you with all the routing capabilities you need. www.zebra.org That and 2.4's adv.routing capabilities and iptables make linux a logical choice as an internet router. The BSD/*nix clowns may know their platforms well, but they obviously know very little about what linux can do and how it can be done. It is typical of these kinds of folks to point out the scarcity of "processes" as proof of their platforms superiority and security. Please be aware that these are opinions from people who are as biased in their way as diehard windows NT fanatics. Yes, I have used FreeBsd and found it very reliable, but NO MORE so than an equally configured linux machine. There are no in- surmountable barriers between securing and configuring a linux machine as a router and there are distributions that specialize in this. I recommend trustix secure linux for this type of work, but any distro will do. I will go so far sa to say that I prefer the flexibility of linux in this role to any of the berkeley distros. YMMV