I recently got a Sprog 3 to program and speed match my locomotives, and today, I'm trying to set up WiThrottle. I started the server from DecoderPro, and it gives an IP address with the 5-digit port number. When I go to the app and use 'configure manually' I can type in the IP address and the port, but the device does not appear on the laptop. The 'set' buttons and all that on the app are greyed out. I can use the throttle on the computer, but not on the phone, so I know the Sprog is connected. Most people say it is a firewall issue, but what am I supposed to allow through the firewall? Do I allow a port? A program? (JMRI) A Device? (The iPhone) I don't really want to screw up my firewall and accidentally allow in viruses, but everything online has been 'JMRI connects automatically' which is obviously not the case for me. My modular club has an MRC WiThrottle modem which works differently because I connect my phone to its network in the Wi-Fi settings. But my phone and laptop are already both on my home Wi-Fi network, so I somehow need to get my computer to recognize that my phone is trying to reach the Wi-Throttle server.