1. Linux Firewall and Proxy Server HOWTO
White paper outlining the basics of firewall systems and giving details on setting up both, a filtering and proxy firewall on a Linux based system.
http://www.grennan.com/Firewall-HOWTO.html http://www.grennan.com/Firewall-HOWTO.html [ , , Entireweb ]

2. Creating A Linux Firewall Using the TIS Firewall Toolkit | Linux
...explains very thoroughly how to build your own `bastion host' firewall with Linux using the Trusted Information Systems (TIS) Firewall Toolkit, by...
http://www.ssc.com/lj/issue25/1204.html http://www.ssc.com/lj/issue25/1204.html

3. Firewall and Network Security Software by Astaro
Firewall - Network Firewall Firewall and network security software from Astaro offers complete firewall and network security solutions in a variety of Linux ...
http://www.astaro.com http://www.astaro.com [ Entireweb, ]

4. Linux Firewall
Linux Solutions - Real Time Firewall Solution Real Time Firewall Solution Most firewalls are purchased with network security in ...
http://www.real-time.com/linuxsolutions/firewall.html http://www.real-time.com/linuxsolutions/firewall.html [ Entireweb, ]

5. firewall - What is firewall
Define firewall - from the Linux / Unix / Computing glossary at About.com.
http://linux.about.com/cs/linux101/g/firewall.htm http://linux.about.com/cs/linux101/g/firewall.htm [ About.com ]

6. Welcome! - SmoothWall
SmoothWall Express is an open source firewall distribution based on the GNU/Linux operating system. Linux is the ideal choice for security systems;
http://www.smoothwall.org http://www.smoothwall.org

7. Firewall Handbuch für Linux 2.0 und 2.2
Das Handbuch beschreibt detailliert den Aufbau von Linux Firewalls mit ipfwadm, ipchains und der SF Firewall. Zusätzlich eine Einführung zum Thema Firewall und Installation von Linux.
http://www.little-idiot.de/firewall http://www.little-idiot.de/firewall

8. IPCop Firewall - What is IPCop Firewall
Define IPCop Firewall - from the Linux / Unix / Computing glossary at About.com.
http://linux.about.com/cs/linux101/g/IPCop_Firewall.htm http://linux.about.com/cs/linux101/g/IPCop_Firewall.htm [ About.com ]

9. Firestarter Firewall
A complete firewall tool with graphical interface for Linux machines.
http://firestarter.sourceforge.net http://firestarter.sourceforge.net

10. Sentry Firewall - What is Sentry Firewall
Define Sentry Firewall - from the Linux / Unix / Computing glossary at About.com.
http://linux.about.com/cs/linux101/g/Sentry_Firewall.htm http://linux.about.com/cs/linux101/g/Sentry_Firewall.htm [ About.com ]

11. Firestarter Linux Firewall
A graphical interfaced Open Source firewall for Linux.
http://www.fs-security.com http://www.fs-security.com

12. Linux Firewall
Linux Firewall...
http://projectfiles.com/firewall http://projectfiles.com/firewall

13. Citrix Systems: Citrix Systems Inc
Provides access infrastructure for the on-demand enterprise, including SSL accelerators, VPN security, remote access, and authentication solutions.
http://www.citrix.com/lang/English/home.asp?sisearchengine=1 http://www.citrix.com/lang/English/home.asp?sisearchengine=1


14. Linux Firewall Howto
Firewall HOWTO collection, ids, nids, hardening, penetration testing, auditing
http://www.Linux-Sec.net http://www.Linux-Sec.net

15. Mason - the automated firewall builder for Linux
(Unsolicited) Reviews "If you have not checked out Mason, I highly recommend it. Mason is a Linux based firewall, but none like you've ever used.
http://users.dhp.com/~whisper/mason http://users.dhp.com/~whisper/mason