JFwadmin is a Java 2 high-level X11 tool for ipchains. The GUI displays easy-to-understand services. Features include scripts generation, firewall save and restore, automatic interface and IP address and routes detection, current firewall configuration display, and handling of masq-modules and port-forwarding.
Coyote Linux is a mini distribution designed for setting up network utility services such as Internet connection sharing, firewalling, or wireless access points. The goal is to make it as quick and easy as possible to set up a Linux system with only a minimal amount of Linux knowledge.
PMFirewall is an Ipchains Firewall and Masquerading Configuration Utility for Linux. It is designed to allow a beginner to build a custom firewall with little or no ipchains experience. This firewall should work for most Workstations, Servers, and Dual NIC routers using either a dialup, DSL, Cable, or LAN setup. It is restrictive to outside attacks while still being as transparent as possible to those inside.
IP Filter is a TCP/IP packet filter suitable for use in a firewall environment. To use, it can either be run as a loadable kernel module (recommended) or incorporated into your kernel. Scripts are provided to install and patch system files as required. IP Filter also supports transparent proxying via packet forwarding, including round-robin forwarding to achieve load-balanced proxy.
nstreams is a program that analyzes the networks streams occuring on a network and prints them in a human readable form. This is useful when you want to set up a firewall but do not know your needs/the needs of your customers. nstreams can read tcpdump output files or directly listen on a given interface, and may even produce ipchains (Linux) or ipfw (BSD) firewall rules instead of printing the streams, letting you build your firewall automagically.