CODEWITHSUNDEEP
amazon-web-servicesamazon-ec2load-balancing
David Williams
David Williams

Reputation: 8664

EC2 Load Balancer: What is the Difference Between LB and Instance Protocol

I am setting up a load balancer for my ec2 instances. I'm a little confused about the difference between the options

Load Balancer Protocol
Load Balancer Port
Instance Protocol
Instance Port

In particular what is the difference between the "Load Balancer Protocol" and the "Instance Protocol"? If I want to do SSL offloading on the LB but send through decrypted traffic to an instances web head listening on port 80, shoudl I use, 

HTTPS 443 HTTP 80

or 

HTTPS 443 HTTPS 443

What if I dont want to do SSL offloading at the LB? What if I wanted to do it on an NGINX web head behind the LB? In that case how would I configure this?

Upvotes: 3

Views: 2056

Answers (1)

datasage
datasage

Reputation: 19573

If you want to offload SSL to the ELB, you would configure an HTTPS listener on the ELB and forward it to an HTTP listener (Often port 80).

If you want SSL to pass through to your instances, then you would just configure a TCP pass through listener.

Upvotes: 2

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