| hnsg.net | Routing/Firewalls with Linux |
| benzedrine.cx | Packet filter (pf) mailing list |
| grc.com | Shields Up: Personal Firewalls |
| acm.org | Network Security, Filters and Firewalls |
| firewall-1.org | Network Presence FW-1 Mailing List Archive |
| samspade.org | "Personal Firewalls" are Mostly Snake-oil |
| outpostfirewall.com | Outpost Firewall - The Webhiker's Guide |
| geocities.com | Personal Firewalls - what they can do and what they can't |
| sourceforge.net | Seattle Firewall (seawall) |
| geocities.com | Internet Protection and Security by Firewalls Paper |
| securepoint.com | msgs.securepoint.com/ |
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