AWS Config provides a detailed inventory of the AWS resources and their current configuration while continuously recording changes. This helps in evaluating these configurations and changes for compliance with ideal configurations defined by AWS Config Rules.
AWS Config offers AWS defined, pre-built templates and config rules along with user-defined customized rules. The account owner is immediately notified via Amazon SNS about all changes to the resources.
This AWS Config rule is currently only available in AWS N. Virginia region for now, but AWS Config as a service is available in all the regions.