Port 56565
In live entertainment systems, port 56565 is used by PosiStageNet.
udp/56565
PosiStageNet — PSN_INFO and PSN_DATA packets
An open multicast UDP protocol for streaming live 3D position, orientation, speed and acceleration of tracked objects on stage. It is how a tracking system tells lighting consoles, media servers and audio renderers where a performer or a piece of scenery actually is, right now.
Check it from the command line
npx showstack port 56565
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