Rules are very specific exceptions to the configured policies. Rules allow the forwarding of ports. Rules allow for traffic to move from particular ports or addresses in a manner that would normally be prevented by the policies.
To configure a new rule, select Rule Wizard from the options menu of the Firewall page and select the type of rule you wish to configure.
Each Rule type makes use of the same rules parameter sheet, with certain fields pre-configured depending on the type of rule.