RabbitMQ connect to remote cloud9 workspace


I’m trying to connect a consumer app hosted in let’s say workspace A to a RabbitMQ message broker running in workpace B.

I have stopped apache2 and configured rabbitmq to listen to port 8082. inside workspace B all works fine and test consumers inside workspace B are able connect locally at $IP:8082.

But I can’t connect from workspace A to ‘workspace-B.c9users.io:8082’.
so, any advice? thanks in advance.