I'm having trouble configuring the iPhone app. I am able to connect to my Arduino webserver from another computer inside my home network using the private IP address and get current status. I can also access the public IP address of my home router and get the current status returned to me. What I'm having difficulty with is the iPhone app. No matter how I enter the public IP address (I've tried numeric IP address, and I did a reverse lookup and entered the full URL) the app returns an error message of "unsupported URL".
What am I doing wrong?