Need help opening up Linux

I’m pulling my hair out here guys.

I have a Linux box (Red Hat 9) that I am installing a web app on. I have the app installed and when I open the browser on the local machine and input

http://localhost:8080/index.php

It launches fine and life is good. When I type the actual IP of the machine I get a message that the connection was refused. I’m guessing I have a problem with some blocked ports. I went into the GUI firewall and turned it off. That didn’t help. I set an entry in my iptables for my PC to allow connections from my PC on port 8080. Didn’t help. Am I missing something?