The following list contains the ports that are used by HA for communication. If your environment contains firewalls ensure these ports are opened for HA to function correctly.
High Availability port settings:
8042 – UDP – Used for host-to-hosts “backbone” (message bus) communication
. 8042 – TCP – Used by AAM agents to communicate with a remote backbone
. 8043 – TCP – Used to locate a backbone at bootstrap time
. 8044 – UDP – Used by HA to send heartbeats
. 2050 – 2250 – Used by AAM agent process to communicate with the backbone.