Can't connect to any game servers.

Open NAT type is always going to give you best connection to servers/games.

The number of people using the router can also affect it as the router could possibly be getting overloaded.

And the firewalls in place could also be stopping you. you will need access to the router to check firewall settings.

some games require certain ports to be open so checking with the game website could help you get some more information.

maybe speaking with I.T/TECH department at your uni/college might help as they will know more on the setups they have in place.

if you have moved from one i.p to another clearing your alternate mac address could help you significantly, go to settings-network settings-advanced-alternate mac-clear (your xbox will restart)

Too bad to hear this friend, see if this link helps you, the ideal to play smoothly is open NAT. Good osrte, I hope for sure !!

https://support.xbox.com/pt-BR/xbox-one/networking/nat-error-solution

Hi SYN DemonWolf,

Thanks for reaching out to us in the forums for this issue. As you've indicated that you're in a dorm, you'll need to get in touch with your person in charge of the network hardware to get yourself set up in a situation in order to have the server
connectivity dedicated. As there are likely others trying to get squared away with getting multiplayer connection for their consoles, you may also need to set up a static IP and port forward to accomplish this. Regarding the UPnP issue, that is part of the
router settings for your internet source.

Here are a couple of handy support articles that can help you with asking for assistance from your RA or IT advocate:

UPnP not successful in your network settings

Network ports used by Xbox Live on Xbox One

Xbox One Multiplayer Game Solution

I hope that this helps out!

Let us know if you have any further questions.

If the previous suggestions are not working, you can try to have Instant On turned off and Power Saving turned on. This makes your console take longer to start when you want to play it but refreshes the UPnP when it is starting up to help certain routers
setup your NAT. I know it is not ideal but I have seen people use it as a work around for routers that may be hosting multiple Xbox systems and may not have the latest UPnP technology.

First Things First: Register Your Device

Most colleges have a system where you can just register your device using its MAC address to get it on the network. Check with your college's IT helpdesk to see if they have such a system in place.

Hopefully it'll be that easy, and you'll be done.

If not, continue reading.

College WiFi

Most colleges have a similar system deployed, where if you want to connect over WiFi, you need to log in using your student username and password. The XBO, unfortunately, isn't prepared for this, so you don't get the right prompt, and thus, can't connect.

A quick way to get around this, is to spoof your XBO's MAC address. There's two easy ways to go about this. The first is easier and more straightforward, but doesn't always work for every network adapter, so you may have to go to the second, slightly more
annoying method.

Method 1 - Easy Mode

1. Disconnect your wireless device from the college's WiFi network, and turn off your XBO(unplug it).
   
2. Open the Device Manager in Windows
   
3. Go into "Network adapters", find your WiFi adapter, right-click it, and click Properties
   
4. Under the "Advanced" tab, you'll see a list of properties. Find "Network Address". If it's there, you're fine; if not, you'll have to go to Method 2.
   
5. Click "Network Address", and you'll see a "Value" field on the right. Enter the XBO's WiFi adapter MAC address(not the wired MAC address), which can be found under its network settings, then click OK to confirm.
   
6. With the MAC address now changed, connect to your college's WiFi network, and log in like you normally would.
   
7. Go back to the adapters properties, and find that "Network Address" property again. Switch it to "Not Present", and click OK. You should now be able to connect to the college's WiFi with your XBO.
   

Method 2 - Slightly More Annoying Mode

1. Disconnect your wireless device from the college's WiFi network, and turn off your XBO(unplug it).
   
2. Open the Registry Editor(search for regedit)
   
3. Click File > Export... and make a backup of your registry. Make sure to save it somewhere safe, that you can remember, because we might need it in a minute or two.
   
4. We need to navigate to the registry entry for your network adapter that you connect to the WiFi with, so go to
   HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Class{4D36E972-E325-11CE-BFC1-08002BE10318}, and expand it. You'll see a bunch of sequentially numbered folders, each representing a single adapter. Click on each folder, and check the values
   on the right to find "DriverDesc" to see the name of it, so you can find the one that's for your WiFi adapter.
   
5. When you've found the folder that corresponds to your WiFi adapter, check if there is a value labeled "NetworkAddress". If there is, right-click it, and select "Modify". If not, right-click in the empty space
   below the values, and click New > String Value. Give the new value the name of "NetworkAddress", then right-click it, and select "`Modify'".
   
6. In this field, enter the wireless MAC address of your XBO, which can be found in the network settings.
   
7. Go to the Device Manager, find your WiFi adapter, disable it, wait a second or two, then re-enable it.
   
8. Connect to the network, and log in.
   
9. Go back to the registry, and delete the "NetworkAdapter" value if you had to make it, or simply delete the value data you assigned to it.
   
10. Go back to the Device Manager, disable, then re-enable the adapter.
    
11. You should now be able to connect to your college's WiFi
    

Why would this work?

Your college is likely using a system that ties MAC address to your student credentials to determine if a device is allowed on the network or not. If you successfully logged into the system on a device, they remember the MAC address you did it with, and
the next time you connect with that device, you won't have to log in because they can see the MAC address and know it successfully logged in before.

Why wouldn't this work?

This is not a guaranteed solution, but it's a really safe bet. It might not work because your college may be using a different system. If that's the case, contact the college's IT helpdesk and see what's up.

College Wired Network

It's likely that all you'll have to do is the same steps as before, except using your devices
ethernet adapter, and the XBO's wired MAC address.

Give that a shot, and that should hopefully do the trick if you couldn't just register it.

And if these methods don't work?

Contact your college's IT helpdesk. They'll know more about the system than I would, and likely have some pre-canned solution ready to go.