Simple Notification Service (SNS)
Kinesis + MQ
Databases & Analytics
Classic Load Balancer (CLB)


  • It makes routing decisions at either the transport layer (TCP/SSL) or the application layer (HTTP/HTTPS).
  • It requires a fixed relationship between the load balancer port and the container instance port.


  • To start using using CLBs, you must configure one or more listeners.
  • Listener:
    • A process that checks for connection requests.
    • It is configured with a protocol and a port for front-end (client to load balancer) connections, and a protocol and a port for back-end (load balancer to back-end instance) connections.
  • It supports the following protocols:
    • HTTP
    • HTTPS (secure HTTP)
    • TCP
    • SSL (secure TCP)
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