Since my last question, something ... weird ... happened to my computer, requiring me to reload the prtg program.
When it was loaded it gave me a message "Please wait for prtg server to start". Reading through other threads, I went to make sure that the port I had was 80. In PRTG Administration, it showed the port as 8080. So I changed it to 80. The program stopped and started the services, and after re-opening the PRTG admin Program, the port was still 8080. I have run the program as Administrator in Windows to make sure it wasn't a privileges thing. The same happened.
So I tried opening my web browser (Brave) and entered the external IP for my machine to port 8080 i.e. http://<the ip address>:8080 and I get a request timeout.
In the PRTG administration tool, I figured I had to add the external ip address for my computer in the Core Tab, but it doesn't let me do this. I see the loopback and internal addresses and they are checked off.
Anyone have any ideas?