iptables V1.4.13 Released.

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.
Release Notes Version 1.4.13 : This release added support for xt_addrtype rev 1, xt_nfacct, xt_rpfilter, IPv6-capable xt_ecn, and xt_recent’s reap feature

Download :  iptables-1.4.13.tar.bz2
Read more in here :  http://netfilter.org/projects/iptables/