Rule: S3 Bucket Cross-Region Replication Enabled
Ensure S3 bucket cross-region replication is enabled to meet critical system and communications protection standards.
| Rule | S3 bucket cross-region replication should be enabled |
| Framework | NIST 800-53 Revision 5 |
| Severity | ✔ Critical |
Rule Description:
S3 bucket cross-region replication should be enabled to comply with the security controls outlined in NIST 800-53 Revision 5. This control ensures that data stored in an Amazon S3 bucket is replicated to a different region for improved data durability and availability.
Troubleshooting Steps:
If cross-region replication is not already enabled for an S3 bucket, follow the steps below to troubleshoot and enable it:
- 1.
Verify IAM Permissions: Ensure that you have the necessary IAM permissions to enable cross-region replication. You should have permissions to modify S3 bucket policies and bucket replication configuration.
- 2.
Check S3 Bucket Settings:
- Open the Amazon S3 console and navigate to the desired bucket.
- Click on the "Properties" tab and check if "Replication" is listed. If not, cross-region replication is not enabled for the bucket.
- 3.
Review Bucket Replication Configuration:
- If cross-region replication is not enabled for the bucket, click on the "Management" tab and select "Replication".
- Click on "Add Rule" or "Create Rule" to configure cross-region replication.
- Choose a source bucket and destination bucket in different regions.
- Configure replication options such as replication rule name, storage class, and IAM role for replication.
- Save the configuration settings.
- 4.
Verify Replication Status:
- After configuring cross-region replication, monitor the replication status in the S3 console.
- View the "Replication Status" column to confirm if the replication is working correctly.
- If there are any errors or delays, review AWS CloudTrail logs and S3 bucket logs for troubleshooting.
Necessary Codes:
If you prefer to use AWS CLI to enable cross-region replication, use the following code snippets:
- 1.To start replication for an S3 bucket:
aws s3api put-bucket-replication --bucket <source-bucket-name> --replication-configuration '{ "Role": "<arn-of-destination-bucket-role>", "Rules": [ { "Status": "Enabled", "Destination": { "Bucket": "arn:aws:s3:::<destination-bucket-name>" }, "Prefix": "" } ] }'
- 1.To confirm the replication status of an S3 bucket:
aws s3api get-bucket-replication --bucket <source-bucket-name>
Step-by-Step Guide for Remediation:
- 1.
Log in to the AWS Management Console and open the Amazon S3 service.
- 2.
Find and select the S3 bucket that needs cross-region replication enabled.
- 3.
Click on the "Properties" tab.
- 4.
If "Replication" is not listed, click on the "Management" tab and select "Replication".
- 5.
Click on "Add Rule" or "Create Rule" to configure cross-region replication.
- 6.
Choose a source bucket and destination bucket in different regions. Ensure you have the necessary IAM permissions.
- 7.
Configure replication options such as replication rule name, storage class, and IAM role for replication.
- 8.
Save the configuration settings.
- 9.
Monitor the replication status in the S3 console.
- 10.
Verify that the "Replication Status" column shows "Enabled" for successful replication.
- 11.
If there are any errors or delays, review AWS CloudTrail logs and S3 bucket logs for troubleshooting.
- 12.
If preferred, you can use the provided AWS CLI commands for enabling and checking replication status.
By following these steps, you will enable cross-region replication for your S3 bucket, aligning with the NIST 800-53 Revision 5 security controls.