Firewalld

• Firewall rules can be modified from GUI:
  
  yast2 firewall

  1	yast2 firewall

• Assign internal interfaces to “Internal zone”

• Add SSH service to “External zone”

RabbitMQ

In order to allow to access rabbitmq from a remote (and local) host to rabbitmq server before starting rabbitmq-server add in /etc/rabbitmq/rabbitmq.config: