Used this howto: NAT Gateway, Iptables, Port Forwarding, DNS And DHCP Setup - Ubuntu 8.10 Server but I have a problem. I have added to this iSCSI and SAMBA. iSCSI seems to be working, but SAMBA doesn't. If I turn off the firewall it works, so I guess the NAT is messing things up? smbclient says timeout connecting... I have 3 Nic's eth0 is external eth1 is internal 10.10.0.1 eth2 is not used So, what do I have to do to the firewall rules you list to make it work? Thanks.