Transmission

Yes, I always tried to restart after changing the port. Never worked. Though I never followed rigorously the routine 1-6 you mentioned; I would just change the port without worrying whether or not the transfers were paused, and then load Transmission again, then try to resume the download. But if th...

I always had the same problem. It is a problem with Transmission. Firewall has nothing to do with it; just use uTorrent with the same port and you can verify that it will connect without any issues. This is UDP-specific. If another tracker is added with a HTTP protocol, it will work, even when the U...