LeeBkr311,
I don't know if you noticed or not, but the guy is a newbie and he is using Windows boxes. Can you imagine what would happen with a misconfigured *nix box set up as a firewall on his network. Many people who think they know what they are doing with *nix firewalls still misconfigure them. It is basically like asking someone to own you.

I agree with the others, get a linksys router. They are cheap and easy to configure. I would definately not recommend it for a company, but for home use it is fine.