Xbox Live NAT and UPNP issues

I have a GL-AR750 and I was able to solve my wifi disconnection issues (used a power supply to connect to ac instead of the USB port on pc), now my issue is because the new WebGUI doesn’t have how to enable NAT and UPNP from scratch I had to download and install some packages and plugins to make this work and so far nothing. My actual issue is to play Xbox live (multiplayer) you need to have your NAT and UPNP opened. I used port forward as well for the ports needed to play online using Xbox live but it always has the same issue my NAT is moderate and UPnP is not reaching the destination. I need help please it is annoying playing online and after 5 minutes my Xbox live connection drops

thanks in advance guys

You can try configuring port forwarding manually.