Using Elastic IP to Identify Internal Instances on Amazon EC2 · Alestic.com - A Personal AWS Blog by Eric HammondElastic IP Amazon EC2 supports Elastic IP Addresses to implement the effect of having a static IP address for public servers running on EC2. You can point the Elastic IP at any of your EC2 instances, changing the active instance at any time, without changing the IP address seen by the public outside of EC2. This is a valuable feature for things like web and email servers, especially if you need to
