Configuring an RDP firewall rule on a MI424WR-GEN2 Router
To configure an Actiontec MI424WR-GEN router/firewall to permit an
RDP connection through to a system behind the firewall, you can take
the steps listed here
to configure the device for connections on either the standard RDP port of
3389 or a non-standard port of your choosing.
You may want to choose a nonstandard port to reduce the number of
break-in attempts on the port from systems on the Internet or in cases where
you have one public IP address for the outside of the router, but multiple
systems behind the router that need to be accessed by users via RDP.