on portforwarding i get the option to put in my external start port which is 3071
and my external end port whuch is 3072

but i only get the option to put in one internal port number
ive seen that if your external ports are the same you can put that as your internal port but obviously i cant don that because i dont know which one to put in???

just to make it clear i have only 1 internal port option, no 2
so dont say just write your external port numbers