Скачать или смотреть Manage Firewall with Puppet

A firewall is a system designed to prevent unauthorized access to or from a private network. Firewalls are frequently used to prevent unauthorized Internet users from accessing private networks connected to the Internet, especially intranets. All messages entering or leaving the intranet pass through the firewall, which examines each message and allows, proxys, or denies the traffic based on specified security criteria.

Iptables is an extremely flexible firewall utility built for Linux operating systems

Managing firewall on huge environment (complex) or a single server becomes very convenient with puppet. Let's see how?