From version 1.3.4 ebuild
* This package now includes an initscript which loads and saves * rules stored in /var/lib/iptables/rules-save * and /var/lib/ip6tables/rules-save * This location can be changed in /etc/conf.d/iptables * * If you are using the iptables initsscript you should save your * rules using the new iptables version before rebooting. * * If you are upgrading to a >=2.4.21 kernel you may need to rebuild * iptables. * * !!! ipforwarding is now not a part of the iptables initscripts. * * To enable ipforwarding at bootup: * /etc/sysctl.conf and set net.ipv4.ip_forward = 1 * and/or * net.ipv6.ip_forward = 1 * for ipv6.