I'm setting up a few logstash-forwarder agents which will send logs to a central Logstash server, and need to choose a port for Logstash to listen on. After doing some searching, there doesn't seem to be a consensus about what this port number should be. The lumberjack protocol doesn't have a well-known port assignment as far as I can see.
The closest I was able to find as a convention was port 5000 (for example, here) but that strikes me as more of a tutorial, get-it-working-fast port.
Are there any established conventions for choosing this port number?