Thanks for the info. & that is an I. Yes it would be wise to do what's known as port forwarding. This opens a port to allow LW full & not just partial access to LW. You'll need to set up a static ip 1st for it to work properly. A guide is in a link at the top of the following page followed by Port Forwarding instructions for the Dlink DI-604 & use Port 6346 read the instructions carefully.

You will also need to force ip within LW: Force IP instructions & sample image