Help me solve a year long networking problem [Cannot get a teredo IP]

I've just enabled AP mode on the router, and have managed to get the internet working. Last time, I left the ethernet cable from the wall plugged into the WAN section, now it's in a LAN port.

I'm about to test the xbox.
 
I've tested the Xbox and it's working! New problem - I cannot connect any additional devices. I'm getting IP configuration issues. However, connecting over ethernet works.

I don't understand, since the Xbox is connected over WiFi?

:(
 
Every device needs it's own IP address.

The port on your wall is probably configured to only issue a single IP address.

With a wireless access point connected your client devices will all be trying to get an IP address from the wall port. Only one of them can succeed.

When a router is connected you expand the number of available IP addresses using Network Address Translation (NAT). Unfortunately in your situation this puts you into a double NAT situation (the wall port will already be connected back to a NAT device).

It's the same situation you get when you connect your own router behind an ISP supplied router. In a home situation where you have control over both routers you can usually mitigate most of the problems. If you don't have access to the upstream router you're stuck with what you've got.
 
Let's backtrack a bit to basics: do you get a public or private IP address from the wall port? Specifically, is your IP address 10.x.y.z, 172.x.y.z, or 192.168.x.y? If so, you're already subject to NAT.

Here is some detail about double NAT and some suggestions on how to deal with a double NAT. Another way is to set up your router to connect to a VPN service which gives you a public IP address.
 
My IPv4 address is in the form of 131.x.y.z

When connecting my computer directly to the wall, I'm still getting the issues through Windows 10 Xbox app.
 
MrRockliffe said:
My IPv4 address is in the form of 131.x.y.z
Click to expand...

That's a public IP address so double NAT does not apply. You should be able to enable NAT on your router without issues.

Hmm... does your router have a DHCP server? Is it enabled? Is a VLAN tag necessary on the WAN side of your router?
 
It does sound like they're only allowing one device through the ethernet port. Having your router in AP mode pretty much means the IP is coming from the university's end of the connection instead of your router, so no double NAT issues. But then you're stuck with having no control over the connection (in this case, a device limit).

It does seem the Xbox has issues with double NAT looking around the web, but no one has yet to find a good fix. The basic fix being the host/university opening ports to your IP, but then that will lock out those ports from everyone else on the network.
 
If that's the case then surely @Quartz he's getting a private IP? His university is probably using that IP range due to being used by students so possibly functions similarly to public hotspots.
 
Orcvader said:
If that's the case then surely @Quartz he's getting a private IP?
Click to expand...

No, that's a public IP address, much the same as the one you get from your ISP. The university probably owns the whole 131.x/16 range. This does not preclude the university from restricting things. For example, with BT, I have to use a VLAN tag to get my VDSL router to work. The OP should speak to the IT department of the university.
 
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