Firewall
Checks are needed for a firewall and ports that might need opening, for example:
# start rabbitmq rules
-A INPUT -p tcp -m tcp --dport 25672 -j ACCEPT
-A INPUT -p tcp -m tcp --dport 4369 -j ACCEPT
-A INPUT -p tcp -m tcp --dport 5672 -j ACCEPT
# end rabbitmq rules