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 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.

• High Availability Prerequisites
• Configuring a HA Cluster
• Components of a High Availability Cluster
• Testing High Availability
• Troubleshooting High Availability
• Upgrading a High Availability Cluster

See also

The documentation for pfSense software contains additional details:

• High Availability

• High Availability Configuration Recipes

• High Availability Troubleshooting