Sentry Firewall CD-Rom - A Linux-based bootable CD-Rom suitable for use as an easy to maintain firewall. Guarddog - A firewall configuration utility for Linux. It is aimed at novice to intermediate users who are not experts in TCP/IP networking and security, and those users who don't want the hastle of dealing with cryptic shell scripts and ipchains parameters. GuardDog is designed to be easy to use for those who don't have a full understanding of IP packets, ports and protocols. SmoothWall - A secure operating system that converts a redundant PC into a firewall and VPN gateway. It is webmanaged so no keyboard, monitor, or mouse on the device is needed. It supports Internal ISDN, all popular NICs, all popular connection types (Modem / ISDN / Cable / ADSL / USB ADSL / Ethernet) and also features a fully logging firewall, DHCP server, IPSEC VPN. IPCop Firewall - A secure Linux distribution managed through a web-interface. It turns an old PC into a firewall and VPN gateway. Features an Intrusion Detection System. FloppyGate - On a floppy linux distribution ready to be used as an ip masquerade firewall. Includes basic h323 support. BBIagent.Net - Provides a suite of applications to create the software for booting a computer as a broadband router and firewall. Features a Java-based administration GUI and flexible access control. BrazilFW Firewall and Router - Single floppy disk firewall (forked from Coyote Linux) with many optional features including tiny proxy, dhcp server, traffic shaping, and is controller via an HTTP interface. Runs entirely in RAM without the need for any type of disk drive, but can boot off a floppy, hardisk or cdrom. Turtle Firewall Home Page - Software which can configure a firewall based on netfilter, so it's compatible with the Linux Kernel versions 2.4.x and 2.5.x. Zeroshell - Linux Network Appliance for servers and embedded devices, distributed as Live CD or Compact Flash image, configured through a Web-Interface.