POS P100, P133, 486 or similar, 2 NIC's, Smoothwall firewall, Mandrake Single Network Firewall or other similar linux/unix based firewall. Alot of them are free when used in accordance with the GNU licenses. set it up with 64mb - 128mb RAM and a 3gb drive and you've got yourself a basic and functional firewall.
For software firewall to protect a single PC: XP's built in firewall, ZoneAlarm, Norton's firewall, Sonic Guard, etc.
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Tecelote
~ Look at what you have; Look at what you want. Fix what you have in such a way as to get what you want. ~
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