Ok enabled must be checked, description is just what it says.
inbound port and private port must be the same (inbound is what comes in from the internet and private is the port used at your pc and unless in some special cases is always the same)
Type: Put on both
And private ip adress is the ip of your computer, you can get it by opening command prompt (Start Menu\Programs\Accessories\command prompt) and typing "ipconfig" (without "")
Do that for all ports you want to forward and you should be able to host a game.