We assume here that you can only get connected to internet through a serial modem connection and that you want to share that connection with other (internal) computers in your home or office. What follows describe the configuration of this dial-up modem router. Your external interface (to the internet) will be ppp0, your internal interface (to your internal network) is supposed to be done through an ethernet network card (eth0).

What follows has been tested with Bering v1.0-rc1 on a Pentium 133 machine and a US Robotics external modem connected to com1 (ttyS0).

The PPP-Howto is a useful reference for this section.

Comments on this section should be addressed to its maintainer: Jacques Nilo <jnilo at users.sourceforge.net>. Thanks to Lee who provided useful additions to this section.