I have a dynamic dns entry for my Internet connection (e.g. doogle.no-ip.info). This resolves to the actual IP address of my Router. However, attempting to Ping either the IP Address or the DNS fails (100% loss). I can ping the local IP address with no problems. (e.g. 192.168.1.88)

I've turned off windows firewall and avg virus which makes no difference. Has anyone got any ideas?