If you want to connect, you're probably going to have to do the UPnP thing or use port forwarding. It all looks confusing, I know (nearly had a panic attack the first time I had to port forward!), but if you just take it slow & go through step by step it's not so scarey

It's up to you whether you want to go through it or not. I can't find any info to say that your ISP is definitely blocking, or even shaping, p2p - so it's likely that your modem's what's stopping you from connecting.