I have a buffalo Airstation WHR-G300N_V2-EU, I cannot seem to get port forwarding set up, I have spoken to Buffalo about it and they said it all looks OK so I should check with my provider to see if the port is blocked.
I have tried port 80 and 88 and cannot get any response, I have a QNAP NAS drive that I need to access.
I cannot get anything with either the IP address or the DNS name.
I think I have this resolved now but not sure what the issue was, in the setup page of the router, there is an option to check connection, when I was having trouble it would show the connection OK and a very short time later would show no DHCP found, I think due to that I then made setting changes so when the connection was OK I had messed it up.
I am not sure if the connection refers to the DHCP server at VirginMedia or the DNS server at DynDNS? but it seems to be OK now.