Configuring CARP on pfSense
Purpose
With any firewall and gateway, the issue of a single point of failure is always present. In order to mitigate this Common Address Redundancy Protocol was invented for the BSD world. For those of you coming from a Cisco or other network gear manufacturer, this functions at a high level the same as VRRP or HSRP. The main difference seen with pfSense is the ability to sync configurations using pfsync. This tutorial should provide an overview of configuring this setup within pfSense and showing effects of downtime on the system.
First of all we have the general layout of this sample setup.
