I have a laptop which occasionally uses Ethernet and most of the time WiFi. Now I want to forward a port in the router so that it always points to my current IP. I'm likely to get different IPs from time to time and I can't really use a dedicated IP for the machine since the IPs are assigned by MAC address and the wireless card has a different MAC address than the Ethernet port. I'm using a NetGear CG3100 router.