I have two pfsense servers and only only external IP on a DSL modem. Currently the modem is bridge and my primppary pfsense server has the extenal IP. Is there a way to configure it so if I have one server fail the other will take over, I guess in a way like a clustered configuration.
CARPDEV does this, but it is not yet working on FreeBSD. For now, you will need at least three public IPs for a CARP cluster.