What firewall ports do I need to open?

Access has been working great when I'm on the same WiFi network. But I want to be able to access my Mac over the internet when I'm out. I'm getting a message about required ports being closed. What ports do I need to open up on the firewall to allow the iPad to get to the Mac?
Help me plz

 

Hi Ali,

Please refer to http://kb.parallels.com/117017 for ports to be opened.