Need help with router issue!!!!! Please help!!!?

[john]

I have a Netgear N600 router. I am not using the wireless feature. I have all devices hard wired. For some reason the router stopped detecting my Xbox one in the living room and the 360 in my room. I did not change anything, it just stopped detecting online for those devices. Currently my computer is the only thing with internet. I tried messing with the router settings and I don't know what to do! Xbox live network according to the internet is working fine and not down. Please help me people!! Thanx in advance!!

P.S. I have tried resetting ALL devices, computer, Xboxes, router, modem, unplugging cable connection (I have high speed comcast) and even asking God for help!!

Anybody familiar with Netgear settings and what should they be on?! I just want the wired settings. thank you