Hi,
I have the same problem as you. I have posted here the same problem.... but nobody has reply me a solution. I don't know how to do it. But I want to transfer txt file from computer A placed in my local network to computer B placed on a remote NAT network, in other words, all the computer that belongs to remote NAT network depends on a host (computer). I can connect from computer B to computer A but not from computer A to computer B because of the topology of the remote network.
ToNi.