Any of the forum members experimented with NFS trough ssh tunnel?
I found that sshfs might be usefull for transferring data, but items depending on network latency are plain murder.
Ie. try to ger directory listing from a dir containing some 500 files using 3g connection and sshfs. It takes 10 minutes or so.
Apparently NFS tunneled trough ssh would provide better results. Just that I haven't found suitable examples that I could modify to suit DNS-325