Findings:

• Cisco Pix 515 Firewall
• FTP and firewalls
• firewall code
• firewall machine
• Firewalls and Internet Security
• Great Firewall of China
• Phoenix firewall appliance
• firewall myths
• firewall rules
• firewall (user)
• Configuring FreeBSD as a NAT router and firewall
• firewall
• Gauntlet firewall
• Firewall Toolkit
• Stix Nix Hix Pix
• Pix
• Kid Pix
• pix (user)
• Moon Pix
• Cisco 67x
• Cisco
• Cisco Networking Academy
• The World According to Cisco
• Cisco IOS
• Cisco router
• Password recovery on a Cisco 6xxx Switch
• Cisco Products Quick Reference Guide
• Using Hyperterminal to Configure a Cisco 67x Router
• Configuring a Cisco 67x DSL modem/router
• phone firewall
• Entering Debug Mode With a Cisco 67x mode/router
• Making a Management Cable for a Cisco 67x
• Re-programming a Cisco 67x from Debug Mode
• Re-programming a Cisco 67x from Enable Mode
• Cisco dialout utility
• Cisco three-layer hierarchial model
• cisco (user)
• Cisco CBAC

If you Log in you could create a "Cisco PIX firewall" node. If you don't already have an account, you can register here.