"Maybe you can help. I want to set up y Mandrake 7.2 machine as
a router and proxy with a 3Com 56K Message Modem (serial) as
dialup-on-demand and a 3Com 3c509 Ethernet card."
"Setting up a router and proxy is a huge subject, but I will
give you the basics and soe pointers to get you started. There are
a couple of technical terms that you have to be familiar with. The
first is "IP Masquerading...."
"Here are the basic steps that you will need to create an IP
Masq gateway. I warn you, though, that these steps are basic and
will do the job, but you will need to secure the firewall machine.
I am not going to talk about how to make the PPP connection. If you
are unsure about how to do this, take a look at the PPP-HOWTO. I
suggest using kppp or LinuxConf to set up the machine. Nor am I
going to talk about setting up a basic network. If you are looking
for information on that, you can refer to the Linux Networking