@richardogden @Andypandy is the issue preventing Xbox online gaming? I find both XBOX and Playstation gaming will work with and without UPNP. I have the same make and model of router - ZTE MC888. The UPNP on/off switch is found as follows
1. router login details are shown on a sticker on the side the router, usually all you need to do is open 192.168.0.1 on a browser with login "user" password as shown on the sticker
2. icon for the advance settings is on the bottom half of the first screen, click here then firewall then UPNP
try the reboot the router and then reboot the console. As @JonathanB says you might find enabling UPNP doesn't actually resolve online gaming issues, and you will need to manually set an IPv4 profile as per the link shared above.
More information that you probably don't need to know
UPNP helps to automatically open the required ports. These ports must be open to connect to the Xbox network:
- Port 88 (UDP)
- Port 3074 (UDP and TCP)
- Port 53 (UDP and TCP)
- Port 80 (TCP)
- Port 500 (UDP)
- Port 3544 (UDP)
- Port 4500 (UDP)
Instead of UPNP you can manually enable these ports for the Xbox using port forwarding (also found under firewall settings). When these ports are accessible your Xbox will report NAT type is open. However, as I say at the beginning, none of these settings should be needed!
