Connecting directly to ONU

Hey

I can connect to my wireless network and i can connect with my router via ethernet. But the thing is that my router doesn't have a gigabit port so i get low download speeds. I want to connect my xbox directly with my modem in which my optical fiber is connected.
My modem/ONU connects to my router. I want to connect to my modem directly as it has a gigabit port. If i am using a computer i can connect directly to my modem via ethernet by usind Dial Up and entering my username and password. But Xbox doesnt have dial
up so i dont know what to do. Anyways thank you for taking your time to reply.

God above the amount of people in there who think the onus is on MS to fix Treyarch's game.

You may need to make your Xbox's mac address the same as your computers so you wont have this issue. Yes it is possible to have a direct connection from your modem to your Xbox by simply plugging the Ethernet cable into your Xbox from the back of the modem.
I have the same thing.

Yeah you can absolutely connect your modem directly to your Xbox. So your Network checks out fine. If the Internet or Xbox Live test fails, trying resetting your modem by power cycling (unplugging) it for 30 seconds. While it's unplugged go to Settings ->
System -> Network Settings -> Choose your Network which would be the Wired Network in this case -> Go to Configure Network -> Additional Settings and in there I would try Restoring the Factory Defaults. Let me know if this works. It's my process if my Network
is being difficult.

Hi it depends on the modem really if its a cable modem yes no problem at all, although you may need to restart the modem when you swap connections over or do a work around so you don't need to power off:-

www.unofficialguidetolive.co.uk/.../67-direct-connection-to-cable-modem