[Users] node to engine connection

[Itamar Heim]

On 11/28/2012 11:10 PM, Cristian Falcas wrote:
> Hi all,
>
> I want to ask if the node is ever initiating connections to the engine,
> or if the communication is started by the engine only?

other than for registration, if needed/used - only engine --> host for 
ssh (bootstrap/upgrade) and xmlrpc.
but we are looking to move to AMQP based transport in the future, which 
will allow events.
not sure on the final topology of the message bug wrt communication 
channels.