Each port that listens for traffic on a particular load balancer is configured separately and tied to the load balancer. Multiple listeners can be associated with the same load balancer but each must use a unique port.

Protocol: The protocol for which the front end listens. The TERMINATED_HTTPS protocol is only available if the key-manager service is enabled and you have authority to list certificate containers and secrets.

Port: The port on which the front end listens. Must be an integer from 1 to 65535.