Puppet script to show how to open port 80 (HTTP) for incoming Apacahe Web requests via Puppet and iptables command on CentOS

firewall-provision.pp

### FIRE WALL ##########

exec { "open-port-80":
	 command  => "sudo iptables -I INPUT 5 -m state --state NEW -p tcp --dport 80 -j ACCEPT",
	 path     => "${os_path}",
	 unless   => "sudo iptables-save | grep 80 | grep INPUT | grep ACCEPT | grep NEW | wc -l | xargs test 1 -eq",
	 notify   => Exec["ip-tables-save"]
}

exec { "ip-tables-save":
	 command     => "sudo service iptables save",
	 refreshonly => true,
	 path        => "${os_path}",
}

I wrote a detailed explanation on this on my blog here: http://techie-notebook.blogspot.in/2014/05/using-puppet-to-open-port-80-through.html