As we checked Apple Airport Extreme router there are 2 problems:
1 Port mapping may be added for a different port then requested [different public port]
in this case nxserver will not inform about new public port being used for port mapping.
That’s why even if we know external IP address, and GW port used by nxserver
we may not be able to connect to this machine, as router used different port then asked.
2 NXServer is not able to get external IP address, and because of that we do not see port mapping on nxplayer “welcome page”.
We’re working to fix this issues and patch will be soon.