Does version 2.0.x use the same port number (TCP 8000) to communicate with the listener as previous versions?

Yes, by default, version 2.0.x uses the same port (TCP 8000) to communicate with the listener.  With version 2.0.x we have also added the ability to specify a custom port for those interested in writing their own listeners or changing the port number for other reason, such as port forwarding through a firewall.

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