High Availability Configuration Example

This recipe describes a simple three interface HA configuration. The three interfaces are LAN, WAN, and Sync.  This is functionally equivalent to a two interface LAN and WAN deployment, with the Sync interface being used to synchronize configuration and firewall states between the primary and secondary firewalls.

Note: This example only covers an IPv4 configuration. High Availability is compatible with IPv6, but it requires static addressing on the firewall interfaces. When preparing to configure HA, if static IPv6 assignments are not available, set IPv6 to None on all interfaces.