Is there a box I can build that would work across and network type and along with any platform that would work as a firewall, router, and antivirus scanner? I want to build two, one is for a friend with a dial-up connection and 2 Windows 2K computers and the other is for myself who has High-Speed cable and a variety of computers running different platforms.

I don't care what kind of OS or how much configuration is involved in this project, but I know it is possible and I would also be able to record everything I do and possible write my own guide on my experience to distribute.