That would explain why using another port, different from 113 and outside of reserved ports didn't resolve the problem for me.
Yep, that was only half of the problem. But it was a problem. My router refuses to forward 113 by UPnP, with <errorDescription>
ConflictInMappingEntry</errorDescription>. I still have to forward that port manually.
The "127.0.0.1" problem was preventing it from even getting to the point of showing the ConflictInMappingEntry error. It was doing a <errorDescription>
Invalid Args</errorDescription> error instead.
