Rule: S3 Bucket Cross-Region Replication Should be Enabled
This rule ensures that S3 buckets have cross-region replication enabled for better data protection.
| Rule | S3 bucket cross-region replication should be enabled |
| Framework | NIST 800-171 Revision 2 |
| Severity | ✔ Critical |
Rule Description
S3 bucket cross-region replication refers to the process of automatically replicating data from one S3 bucket to another in a different region. This rule ensures that cross-region replication is enabled for S3 buckets in compliance with the NIST 800-171 Revision 2 guidelines.
Enabling cross-region replication provides data redundancy and facilitates disaster recovery by creating a copy of data in a separate region. This helps to protect against regional outages, data loss, and improves data availability.
Troubleshooting Steps
If cross-region replication is not enabled for an S3 bucket, follow these troubleshooting steps:
- 1.Make sure you have the necessary permissions to configure cross-region replication for S3 buckets.
- 2.Check if the bucket policy allows cross-region replication. Evaluate the bucket policy to ensure it contains the necessary configuration to enable replication.
- 3.Verify that both the source and destination regions are correctly configured in your AWS environment.
- 4.Ensure that the S3 bucket versioning is enabled for both the source and destination buckets.
Necessary Codes
To enable cross-region replication for an S3 bucket, you will need to configure the necessary settings. Here is an example of the minimal configuration required in the bucket's replication configuration:
{
"Role": "arn:aws:iam::ACCOUNT-ID:role/CrossRegionReplicationRole",
"Rules": [
{
"Status": "Enabled",
"Destination": {
"Bucket": "arn:aws:s3:::destination-bucket-name",
"Account": "ACCOUNT-ID",
"Region": "us-west-2"
},
"SourceSelectionCriteria": {
"SseKmsEncryptedObjects": {
"Enabled": false
}
}
}
]
}
Please note that you need to replace
ACCOUNT-IDdestination-bucket-nameus-west-2Step-by-Step Guide for Remediation
To enable cross-region replication for an S3 bucket, follow these step-by-step instructions:
- 1.
Open the AWS Management Console and navigate to the Amazon S3 service.
- 2.
Select the source S3 bucket for which you want to enable cross-region replication.
- 3.
Click on the "Management" tab and scroll down to the "Replication" section.
- 4.
Click on the "Add rule" button to configure replication for the bucket.
- 5.
In the "Add rule" dialog, specify the destination for cross-region replication.
- Select the destination bucket by entering its name in the "Bucket name" field or selecting it from the dropdown.
- Enter the AWS account ID of the destination bucket owner in the "Account ID" field.
- Choose the desired destination region from the "Region" dropdown menu.
- 6.
Optionally, configure the source selection criteria. This allows you to filter which objects should be replicated based on their properties.
- For example, you can enable replication only for SSE-KMS encrypted objects by checking the "Enable SSE-KMS encrypted objects" box.
- 7.
Click on the "Save" button to enable cross-region replication for the bucket.
It may take some time for the replication to complete, depending on the size and number of objects in the bucket. Once enabled, any new objects added to the source bucket will be automatically replicated to the specified destination region.
Ensure that you regularly monitor the replication status and troubleshoot any issues that may arise to maintain the integrity of the cross-region replication process.