Hi...

Have you ever seen Incoming connections in the network tab? Or only Outgoing? If you see Incoming connections then clients are able to reach you and you should also be able to upload.

Usually Phex is able to determine your external IP from other hosts on the network. We you connect to a host the host informs Phex about its external IP. Sometime this can be inaccurate. Just compare the IP Phex uses after connection to the network with your current Internet IP. If they dont match you must export your IP.
But what you need to use on your router or switch is port forwarding. If Phex runs on port 2222 you need to tell your router that incoming request on port 2222 should be forwarded to your local ip on port 2222.

Also you can read this for some more information:
http://phex.kouk.de/exportip.htm

Gregor

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