title: self referencing aws security groups
body: <p>my application has ELB, NGNIX and ECS in the web component layer and I am grouping all of them in to one security group and there is internal communication between ELB, NGNIX and ECS. I wanted to create self referential ports for the communication between these three, do i have to write self ingress rule or self outgress rule for this communication is the internal communication between these three inbound or outbound?</p>