Security-Groups

Update September 2010: AWS has added support for tagging instances, volumes, snapshots, and many other EC2 resource types via the API and the AWS Management Console. The techniques described here are no longer necessary. So you have a bunch of instances running in Amazon EC2 and you want to be able to tell them apart easily. The way to do this is to “tag” each instance with a descriptive tag, such as “database”, “web server”, “memcached”, etc. The easy, human-friendly way to tag your instances is to use ElasticFox, and the robust, programming-friendly way is to use Security Groups. ...