iptables is built on top of netfilter, the packet alteration framework for Linux 2.4.x and 2.6.x. It is a major rewrite of its predecessor ipchains, and is used to control packet filtering, Network Address Translation (masquerading, portforwarding, transparent proxying), and special effects such as packet mangling. License: GNU General Public License (GPL) Changes: This release contains lots of bugfixes and improvements for the previous release candidate which strongly improves IPv6 support.

	Read more at FreshMeat
	www.pheedo.com/click.phdo?i=31707684d053feca259930a9db754ff4