I’m working on Windows 10 with a Universal Windows (UWP) app. I’m using a StreamSocketListener in the UWP app to listen as a server. I enabled “Internet (Client)” and “Private Networks (Client & Server) in the app manifest. I used CheckNetIsolation.exe tool to enable loopback for my UWP app. This works: sending TCP messages to the UWP app from remote machines. This fails, but I NEED IT TO WORK: sending TCP messages to the StreamSocketListener in the UWP app from the local machine. The CheckNetIsolation.exe tool seems to have no effect for UWP app as a server. I need to have the UWP app as a server in order to send messages to the app from a local service. Some bad choices I could make as workaround: I could have the app poll the service, but that's very poor and expensive architecture choice. I could message the app from a remote machine, but that complicates things and (for complicated reasons) is very undesirable solution.
Can I fix the UWP as TCP server with a registry edit?