Listener configurations for Classic Load Balancers

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The following table describes possible configurations for HTTP and HTTPS listeners for a Classic Load Balancer.

Use case	Front-end protocol	Front-end options	Back-end protocol	Back-end options	Notes
Basic HTTP load balancer	HTTP	NA	HTTP	NA	Supports the X-Forwarded headers
Secure website or application using Elastic Load Balancing to offload SSL decryption	HTTPS	SSL negotiation	HTTP	NA	Supports the X-Forwarded headers Requires an SSL certificate deployed on the load balancer
Secure website or application using end-to-end encryption	HTTPS	SSL negotiation	HTTPS	Back-end authentication	Supports the X-Forwarded headers Requires SSL certificates deployed on the load balancer and the registered instances

The following table describes possible configurations for TCP and SSL listeners for a Classic Load Balancer.

Use case	Front-end protocol	Front-end options	Back-end protocol	Back-end options	Notes
Basic TCP load balancer	TCP	NA	TCP	NA	Supports the proxy protocol header
Secure website or application using Elastic Load Balancing to offload SSL decryption	SSL	SSL negotiation	TCP	NA	Requires an SSL certificate deployed on the load balancer Supports the proxy protocol header
Secure website or application using end-to-end encryption with Elastic Load Balancing	SSL	SSL negotiation	SSL	Back-end authentication	Requires SSL certificates deployed on the load balancer and the registered instances Does not insert SNI headers on back-end SSL connections Does not support the proxy protocol header