Firewalling a network

[Douglas Alves]

On another thread somebody suggested looking at http://www.IPcop.org/

Could I get the same result of FIREWALLING A NETWORK by using
Firestarter?

What is the difference between IPcop and other firewall software?

I read IPcop must be on a PC physically between the DSL modem and the
router or switch. I guess this would be the same physical configuration
even if I were to use Firestarter, right?