Fix Broken C++ Distributed File System (Possible NAT Traversal Bug)

I am attempting to revive the following project: [login to view URL] It is a distributed file system for large files over wide-area networks. Right now, the project works when the client and master/slave nodes are running on the same machine, but the client doesn't appear to be able to upload/download files from the master/slave nodes when running on machines in different networks (WAN). I suspect that there is an issue with traversing firewalls or some sort of asymmetric network problem, and I'm not familiar enough with ICE/STUN/TURN or other various hole-punching techniques to fix it myself. If someone has some experience with this and is willing to help, that would be great. Thank you!