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One of the primary purposes of pfSense® software is to act as a firewall, deciding which traffic to pass or block between networks.

Managing Firewall Rules

Firewall rules control traffic passing through the firewall. These topics describe how to create and manage rules, plus settings related to rules.


Aliases are collections of addresses that allow many hosts to be acted upon by a small number of firewall rules. They can greatly simplify a ruleset and make it easier to understand and manage.