Yes, I tried on both the HTPC and my PC, I've not tried on my laptop as of yet, but so far the results are similar. The only hotspot is from my ISP, this is a very small town. When I moved here the only broadband was setup via wireless nodes to a tower. It's quite nice since the phone company barely has DSL here. I've had similar problems with a few other software go buggy on me, I tried and tried to get setup to stream to the net.... The problem lies in each node is part of a NAT, there is only one or two actual IP's outside our network, not sure... may be much more than that, since I know they are doing upgrades and running it on a 5 ghz signal now, and it is faster, but the IP isn't and can't be exposed easily, according to their tech, who also lived in my apartment in town, and same after we bought our house. He told me the only way to get a streraming server set up was use a server in Eugene, at their server farm. Of course I'd have to buy the server, and bandwidth. I guess they co-locate here and Eugene, and have a fast network between the two.
The odd thing is I didn't expect to see this happen with a port of 21. I mean really, that's a common open port almost anywhere. I'll check a few other things and see if I can't get it working.