High Availability

This document covers configuration of a High Availability cluster using the following features:

  • CARP for IP address redundancy
  • XMLRPC for configuration synchronization
  • pfsync for state table synchronization

With this configuration, two units act as an “active/passive” cluster with the primary node working as the master unit and the secondary node in a backup role, taking over as needed if the primary node fails.

See also

Customers with a subscription to pfSense Gold may access the Hangouts Archive which contains the June 2015 Hangout also covering High Availability.