I am hoping that someone can answer a question for me. I would like to know if it is possible to use a linux machine to both act as node on the network AND pull double duty as a firewall appliance for the ENTIRE network? If so, please provide me with the specifics to accomplish this request. Any and all help is GREATLY appreciated!:confused:
Yes it can. You probably want to google 'iptables' to do the firewalling, 'squid' too for proxying (which is another kind of firewall and makes more efficient use of your bandwidth). You'd need two network cards for your Linux machine, one connected to the LAN and one connected to the internet. Your Linux machine would become the network gateway.
This is a GOOD Tutorial for IPTABLES setup