You can download Jaadu Connect
HERE which is an automatic setup program that works pretty well. Or you can do it the manual way,
INSTRUCTIONS HERE. Which involves setting static IP's and port forwarding. I personally prefer the manual way as I have seen a lot less connectivity issues, but if you are not comfortable with the port forwarding and IP issues go the Jaadu Connect route. Or feel free to ask if you have any questions.
Try the automatic Jaadu Connect first, personally I think I had to go the manual route because I have five PC's and three Mac's on my network all running Jaadu VNC servers and the port forwarding was too complicated for the Jaadu Connect utility.