nat добавлено пользователем komar. permanent link
iptables -t nat -A POSTROUTING -s 192.168.0.0/16 --out-interface eth1 -j SNAT --to-source $REAL_IP || ipv6-nat http://goo.gl/Mx9vzV || http://aoz.com.ua/2009/01/26/nat-types/ || http://www.dd-wrt.com/wiki/index.php/One-to-one_NAT
CalcScript v. 1.1
Author: mdma special for #linux channel on RusNet. 2011