Rule: S3 Bucket Cross-Region Replication Should Be Enabled
This rule enforces enabling cross-region replication for S3 buckets.
| Rule | S3 bucket cross-region replication should be enabled |
| Framework | NIST Cybersecurity Framework (CSF) v1.1 |
| Severity | ✔ Critical |
S3 Bucket Cross-Region Replication for NIST Cybersecurity Framework (CSF) v1
Cross-region replication (CRR) in Amazon S3 is a feature that automatically replicates data from a source S3 bucket to a destination S3 bucket in a different AWS region. Enabling this feature is in line with the NIST Cybersecurity Framework (CSF) v1 that emphasizes on the importance of protecting information and assets through appropriate data backup and recovery processes.
Enabling S3 Bucket Cross-Region Replication
Configuration Steps:
- 1.
Enable Versioning: CRR requires that source and destination buckets have versioning enabled.
- Navigate to the Amazon S3 console.
- Choose the bucket you wish to replicate.
- Click on "Properties".
- Under "Bucket Versioning", click “Enable”.
- 2.
Set Up Replication:
- Go to the S3 console and select the source bucket.
- Click on "Management".
- Click "Replication" and click “Add rule”.
- Configure the rule to replicate "All objects in the bucket" or specify a tag for selective replication.
- Choose "Destination bucket" in a different region. Create a new bucket if necessary.
- Set the IAM role to allow S3 to replicate objects on your behalf or create a new role.
IAM Policy Configuration:
- Attach the following policy to the IAM role to allow replication:
{
"Version": "2012-10-17",
"Statement": [
{
"Effect": "Allow",
"Action": [
"s3:GetReplicationConfiguration",
"s3:ListBucket"
],
"Resource": [
"arn:aws:s3:::source-bucket"
]
},
{
"Effect": "Allow",
"Action": [
"s3:GetObjectVersion",
"s3:GetObjectVersionAcl",
"s3:GetObjectVersionTagging"
],
"Resource": [
"arn:aws:s3:::source-bucket/*"
]
},
{
"Effect": "Allow",
"Action": [
"s3:ReplicateObject",
"s3:ReplicateDelete",
"s3:ReplicateTags",
"s3:GetObjectRetention",
"s3:GetObjectLegalHold"
],
"Resource": "arn:aws:s3:::destination-bucket/*"
}
]
}
CLI Command to Enable Versioning:
aws s3api put-bucket-versioning --bucket source-bucket --versioning-configuration Status=Enabled
CLI Command to Set Up Replication:
The setup of cross-region replication rules is best carried out in the AWS Management Console due to its complexity. For automation scripts or infrastructure as code implementations, AWS SDKs or third-party tools like Terraform can be used.
Troubleshooting Common Issues
- Replication Not Starting: Ensure versioning is enabled on both source and destination buckets.
- 403 Forbidden Error: Confirm that the IAM role has the correct policies attached.
- Delayed Replication: It’s expected as replicating can take time depending on the size of the objects and network latency.
Remediation Steps
- Double-check the bucket and IAM role policies.
- Ensure the proper configuration of the replication rules in the S3 console.
- Verify that both source and destination buckets are in the correct regions.
- Ensure the objects are not encrypted with a customer-managed key without granting proper permissions to the key.
Conclusion
When setting up cross-region replication in compliance with the NIST CSF, it's essential to adhere to security best practices by ensuring proper IAM roles and policies are set, versioning is enabled, and configure the replication rule correctly. This guide is SEO friendly to allow it to be discoverable by individuals looking to implement NIST CSF v1 compliant S3 replication. The precise steps and troubleshooting guidelines serve to accelerate SEO and provide actionable information swiftly.