I feel like I keep writing the same answer..
It's not hardware but it's really good. All you is a lil' PC (maybe a 486 DX4-100,500 MB hdd, 32MB RAM, two NICs)
Go to www.clarkconnect.org and check out the gateway. it's simple, effective, and quite nice. Very little, if any administration.
It's a 100 MB install, so it's small. It's got NAT, firewall, webcache, etc. plus they have a cool DNS service.
P.S. It's free!!
my 2 cents.
