High Availability

This document covers configuration of a High Availability cluster in pfSense® Plus software using the following features:

  • CARP for IP address redundancy

  • XMLRPC for configuration synchronization

  • pfsync for state table synchronization

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

See also

The documentation for pfSense software contains additional details: