I was having the no incoming connections problem. I opened the modem and selected allow network ping and set it to ip forwarding. I also set the deluge program to use random ports. Things are working now without the error. I am running ubuntu 12.4.

I was having the no incoming connections problem. I opened the modem and selected allow network ping and set it to ip forwarding. I also set the deluge program to use random ports. Things are working now without the error.