Here is my instalation Public Ip ----> 3 Com 812 (192.168.1.1)-->Linux eth1 (192.168.1.2) Linux eth0 (10.0.0.49) ----> My lan (10.0.0.xxx) My linux is using firewall2 and squid and is running well But now i have a pc (10.0.0.14) with carbon copy My router (3com812) sends all traffic now in port 1650 to 192.168.1.2 (before to 10.0.0.14 port 1650) I want to anibody who connects from port 1650 goes to 10.0.0.14 to carbon copy and i trie FW_FORWARD_MASQ="0/0 10.0.0.14,tcp,1680,1680" and still not working FW_FORWARD="" Please help