Firewall

Firewall Builder

Firewall Builder is multi-platform firewall configuration and management tool. It consists of a GUI and set of policy compilers for various firewall platforms. Firewall Builder uses object-oriented approach, it helps administrator maintain a database of network objects and allows policy editing using simple drag-and-drop operations. Firewall Builder currently supports iptables, ipfilter, OpenBSD PF and Cisco PIX.

LEAF

LEAF (Linux Embedded Appliance Firewall) is an easy to use embedded Linux network appliance for use in small office, home office, and home automation environments. Although it can be used in other ways, it's primarily used as a gateway/router/firewall for Internet leaf sites.

floppyfw

floppyfw is a router with the advanced firewall-capabilities in Linux that fits on one single floppy disc.