So that Webjimbo can provide seamless access to your Mac from the internet, you need to enable your AirPort's NAT Port Mapping Protocol.
If you have another kind of router, you need UPnP enabled. It might well be on already - if you see a message in Webjimbo's main control panel window saying your router has been configured successfully, all is well. If it fails, you need to enable UPnP in your router's administration. Exact instructions will differ from one router to another and are not given here.

