When making a NAT rule you select for port mapping type ports to port where you can set external start port e.g. 49142 and external end port e.g. 65535 to internal port e.g. 80
thanks for your request.
Can you maybe explain more detailled a scenario where such a port forwarding would be required?
Say you have a server that is on one port but you want many ports a range to connect to that one port.
Currently I'm using a Edge router with USG40 to run a server that needs many ports to one port which only the Edge router can do and would like to have the USG40 do this type of port mapping.