Listening Port

Overview

A listening port is used by a load balancer to receive requests from clients.

Listeners using different protocols of a load balancer cannot use the same port. However, UDP and QUIC listeners can use the same port as those using other protocols. For example, if there is a UDP listener that uses port 88, you can add a TCP listener that also uses port 88. UDP and QUIC listeners cannot use the same listening port.

The port ranges from 1 to 65535.

Common ports: TCP/80 and HTTPS/443

Single Port

Only requests over the port you specify are listened on.

Port Ranges

Port ranges is available only when you select TCP or UDP as the frontend protocol.

If port ranges are specified, the listener checks requests from all the ports in the port ranges and routes received packets to the corresponding ports on the backend servers.