I have an app on my android phone that communicates over my local wifi network to control an eternet-connected device. To control it remotely ie over 3g,I need to set up port mapping. I can access the modem then go to Internet/Forwarding and then it all gets too complex.
I have to forward port 80
I know the external and internal IP addresses
I know the mac address of the device
Can anyone help from there?

