In case of TCP load balancer, the headers are sent unmodified and backend instances receive the ELB's IP as the client IP. This is described in the AWS docs - h

In case of TCP load balancer, the headers are sent unmodified and backend instances receive the ELB's IP as the client IP. This is described in the AWS docs - http://docs.aws.amazon.com/elasticloadbalancing/latest/classic/elb-listener-config.html#elb-listener-protocols http://docs.aws.amazon.com/elasticloadbalancing/latest/class...