I'm also intersted this topic.
When I set Agent up, I got an error as bellow.
>What port should HQ use to contact the agent [default=2144]:
>- Received temporary auth token from agent
>- Registering agent with HQ
>- Unable to register agent: Failed to connect to agent: Unable to connect to 123.456.789.0ab: connect timed out
When registering an Agent, Manager seems to connect to the Agent through 2144 port.
Do I have no choice to use port forwarding on the Agent?
mtbtaizo