OK, if I use the single port router, my existing 8 port hub, nics and cable modem, I should be all set. Or do I need the 4 port or 8 port router?(If so I would go 8 port, as I already have 4 machines on now). How about firewalls. Right now, using ICS, I just use the firewall on the main machine. Will I need to use firewall protection on all machines with the router setup?