Record and govern S3 bucket configurations with AWS Config

You can now record configuration changes to your S3 buckets with AWS Config. The detailed bucket configuration recorded by AWS Config includes the bucket policy, Access Control List (ACL), lifecycle configuration, Cross-Origin Resource Sharing (CORS) configuration and more. Review our documentation to get a full list of bucket attributes recorded by AWS Config. AWS Config provides a complete history of configuration changes for your bucket. With AWS Config, you can dive deep into how your bucket was configured at any point in time. For example, you can use the configuration history provided by AWS Config to determine how your bucket’s policy or ACL changed over time. 
Quelle: aws.amazon.com