Anyone know if the docos are incomplete regarding firewalls?

Got a MAG across the firewall and all the ports have apparently been opened as per the documentation. However, during import, when the activemq service is started on the MAG, then the AC reports:

Error in sending request to Device.<!-- Connection timed out (Connection timed out) -->

and the MAG reports:

java.rmi.ConnectException: Connection refused to host: x.x.x.x; nested exception is