how to make a computer to function as a router

[Paul Lussier]

Neil Joseph Schelly <neil at jenandneil.com> writes:

> The way to do this is with IPTables

s/The/One/

Technically, if all you want to do is turn a system into a router,
then IPTables is NOT what you want, but rather, something like routed.

IPTables is technically a sw firewall, which happens to pass (or not)
packets between multiple interfaces.  A router is a lot more than
that.

Given that the OP mentioned he had a cable modem, the advice to use
IPTables is prudent.  I mention that there is a difference between
firewall software and routing software for the sake of completeness,
since this same OP has also previously demonstrated a desire to learn
about different ways of doing things :)
-- 

Seeya,
Paul "Leaving the 'sake of pedantry' for Ben to provide"