This tutorial is intended to supply enough information to set up a relatively simple WAN or Internet-connected LAN using WANPIPE® router cards or other routers. Explanations of IP addresses, classes, Netmask asks, subnetting, and routing are provided, and several example networks are considered. Example address and routing configurations are provided for running WANPIPE® router cards under the following protocol stacks and platforms: Unix and Linux., Microsoft TCP/IP on Windows NT Workstation/Server and Windows 95, and others. A basic explanation of IPX routing is also included.
http://www.sangoma.com/main/support/tutorials/tcpip
