Reply To: How to tell if VLAN is not NAT’d › Forums › Network Management › Networking › How to tell if VLAN is not NAT’d › Reply To: How to tell if VLAN is not NAT’d February 12, 2010 at 3:31 pm #49642 wifiguyMember @ppalias wrote: 1) Make sure eth1 is the wan interface. 2) Print here the output of iptables -t nat -L -v Does Eth1 have to be the WAN port? Can it be Eth0?