Unreal Pixel Streaming

Documentation from Epic Games

You can specify the port you use for signalling server

Default port from Unreal is 80, you can update this by modifying cirrus.js file : Line 79 var httpPort = 8080;
: When the server has started and is ready to accept connections, you'll see the following lines in the console window:

Listening to proxy connections on: 8888 
Http listening on *: 8080