Hi, David - It turns out that it was a user interface issue. I knew that I needed to set up a target IP Address for where the port forwarding to go to, but it wasn't clear for me from the app's user interface how I was supposed to enter the target IP Address. The whole app's user interface could be significantly better. One suggestion would be to highlight in red (or another color) any field that requires a user entry so that the user knows to tap or select a field to enter missing data. I eventually figured it out with the help of one of the (very patient) TP-Link tech support staff. Thanks, Alan Additional Note: The user interface on this forum web page reply field is driving me crazy! I've never seen anything like this, and it doesn't reflect well on TP-Link's technical prowess. Maybe you can hire a summer intern to modify this forum's reply field so that unbroken words that extend past the end of the line get displayed unbroken onto the next line instead of just wrapped around with hanging letters? Every other forum I have seen in the last few decades seems to be able to handle this, it can't be that difficult to fix!