Can Both the Listener and Backend Server Group Use HTTPS?

Dedicated load balancers support this function.

You can select HTTPS as the protocol of both the listener and the backend server group.

To use HTTPS at the frontend only, you can create a dedicated load balancer, add an HTTPS listener to the load balancer, and set the backend protocol to HTTP.

Using HTTPS at both the frontend and backend only allows you to enable mutual authentication on the load balancer and backend servers.