What is the advantage of internal only elbs over secured public elbs? : <p>I'm a little unclear on the advantage of internal only ELBs. I could restrict access to my public ELBs with security groups and I have the advantage of allowing public traffic by merely adjusting the security group.</p>

<p>Is the advantage just being absolutely sure no public traffic can hit the ELB? Is it purely for that fail safe kind of thing or is there something here I am missing that I can do with internal ELB but not external ELB?</p>
