I tried to access the firewall web page that is linked to from the FAQ page but I got a missing page error with tons of advertising popups so I'm asking my question here.

I am behind a small home Router with private IPs and a single public IP. Does this setup benefit from any Port Forwarding or such?

I have a significant number of attempts to download that fail after a Connect with the resulting Requerying not successful. Is this because both I and the other side both being behind routers? I do know that two people behind routers can prevent connections and am wondering whether I can increase my connection success rate by making a change in my setup.