I am using a wired connection to the router and my Xbox but every so often i disconnect from the the online services but i am still connected to the internet. I do not think its a broadband issue more so a firewall issue / block.
I will be in an Xbox party and i cannot hear anyone but a few seconds later i can hear everyone again. But i do not drop from the internet it just says connecting.....
Same with playing GTA online i will be in a full session but everyone else leaves and im on my own still connected to online. My friends will still be in the full session together.
I have opened the IPs and Ports on the router, even put the device into DMZ to allow all access but i still get issues.
My thought is that there might be a limit on gaming ports or the firewall on the modem?