Hi. I've searched and searched and haven't found a definitive answer. Can two RVS4000s establish a VPN tunnel if they are both behind NAT gateways (e.g. a couple of WRT54Gs)? If so, what ports need to be forwarded at said gateways to enable this? I've heard talk of enabling the DMZ setting in at least one of the WRT54Gs, but I really would like to only forward the necessary ports for each. Is this even possible in any way? If not, can I at least do this if only one of them is behind said gateway, and which ports would I need to forward in that case? Thanks so much!