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Comment on Cannot bind to local UDP socket - address already in use
I am on macOS, doing point-to-point communication. I believe I found the error. This site gave a list of ports that may be blocked. I saw that X11 is using port 6000 and I recently installed X11 for some docker work I was doing. The port was no longer in use after uninstalling X11. It seems that the port was being reserved, rather than being open. Should I have used a tool other than lsof?
Feb ’22