Re: Regarding Port forwarding ( IPv6 )
Hi (again),
If you are running into issues with the port forwarding itself then you can always try enabling UPnP instead (you cannot enable both at the same time). Below you can find a picture of where you can find this option on your router:
http://screenshots.portforward.com/routers/Technicolor/TC7200/Advanced_Options.jpg
On that same picture you will see a Firewall menu option. Make sure that the firewall is disabled.
Note: I actually think that I've got the same router on my home connection. My ISP is Virgin (previously UPC). I am at a loss as to why you would still be experiencing frequent disconnects if your settings are correct. Are you perhaps using a wireless connection? This type of connection can be unstable depending interference from other devices in your environment. Or, if you are using a wired connection then you could try testing another ethernet cable.
If the above tips don't help you then I can check my settings at home to see if they differ from mine. And lastly, are you getting any error messages when you get disconnected? Does the game crash? Perhaps it is hardware related in which case I would like to investigate a dxdiag if you would be so kind to upload that with your reply.