All [EC2] nodes are internet addressable. They all have internet routable ips/hostanames. Proper use of security groups would address most of the concerns des

All [EC2] nodes are internet addressable. They all have internet routable ips/hostanames. Proper use of security groups would address most of the concerns described in the post. nodes in security group A (load balancer) can access nodes in security group B (app server)