Is Xbox 360 servers been switched of mine and many friends can't connect to the internet or...

Hello Kevin, this is Manuela!. I'm an Independent Advisor and community user like you

I'm sorry to hear you're not able to play online or connect to the Xbox live network on your Xbox 360.

When this started to happen?
May I know if you're seeing an error code when you try to do it?
And, may I know if you tried using a different Wi-Fi connection to see if the issue persist? (You can enable a mobile hotspot for this purpose)

Use whatever you want , when it comes to xboxs I have personally fixed many MANY connection problems with mine , my friends and my sons friends simply by switching to netgear routers I'm a "whatever works " guy and when it comes to xbox , netgear works when
others cant , wont or don't....

MANY problems solved

I've used wifi hotspots with my laptop many times.

Just connect the 360 to the laptop using ethernet connection and switch on internet connection sharing on PC.

Then sign into the hotspot on your laptop and xbox live should then work.

Problem is that an open NAT is not guaranteed.

I assumed it was the modem since if I plug directly into the wall (the complimentary apt internet) I have strict NAT and can't connect to any friends' parties. When I switched to time warner they gave me their own modem and I have my own router. I tried
using two different routers, both with ports forwarded specifically for Xbox One, and connected via ethernet and wifi, and both do not allow either my Xbox One or 360 to connect to the internet. Both don't even recognize the internet for that matter whenever
it is through my private TWC modem, but both do connect with the complex internet.

I can't, it says that it's not connected to the internet. My xbox one is connected to the internet but when I try to play a 360 game on the xbox one it says that it can't connect to the internet.