Misunderstanding, how it works

[Andor]

Hello, Alessandro!
I have little problem with your module.
Example:

  firewall { "rabbitmq-5672":
      protocol    => 'tcp',
      port        => 5672,
      destination => '192.168.21.16',
      tool        => 'iptables',
  }

Creates rule for iptables without specification of destination:

-A INPUT   -p tcp --dport 5672 -j ACCEPT -m comment --comment "rabbitmq-5672"

[Andor]

But at the same time, call for firewall from your modules like puppet-nrpe works fine:

-A INPUT   -p tcp --dport 25 -s 0.0.0.0/0 -d 192.168.21.16 -j ACCEPT -m comment --comment "postfix_tcp_25"