If this IS back-to-back NAT, it's a science project (AKA too hard). All this DMZ and port forwarding/DNAT and ALG crap isn't worth it. Just use OpenVPN. -- Alex Balashov Evariste Systems Web : http://www.evaristesys.com/ Tel : (+1) (678) 954-0670 Direct : (+1) (678) 954-0671 Mobile : (+1) (678) 237-1775