Xbox unable to connect to internet

Unfortunately my xbox refuses to accept even an internet connection now. The modem that it is connected to tells me that an internet connection is present, but the Xbox seems unable to receive it. Again, i just bought a new ethernet cable, so it can't be
that, could it be an issue with my xbox?

try resetting your router back to factory defaults, and then attempt to DMZ host your xbox

Read through my previous post and try what i suggested.

Could you try restore your Belkin back to factory defaults. Press and hold reset button for 10 seconds.

Thanks but this dont solve the problem at all

Go onto your xbox go to network settings - select your network - configure network - go right to additional settings and select restore to factory defaults. Then switch off your console and then your router for 30 seconds. Restart the router and once the
internet light is a solid green turn on the console and reconnect to your network.

If you are still not connecting to xbox live please select more info and then post the description here on the forums. Thanks

If you are getting a dns error try these dns settings.

primary - 8.8.4.4

secondary 4.4.4.4