S3 Bucket Cross-Region Replication Enabled Rule
This rule mandates enabling cross-region replication for S3 buckets to ensure data redundancy and disaster recovery.
| Rule | S3 bucket cross-region replication should be enabled |
| Framework | CISA-cyber-essentials |
| Severity | ✔ Critical |
S3 Bucket Cross-Region Replication for CISA Cyber Essentials
Description:
Cross-Region Replication is a feature in Amazon S3 that automatically replicates objects from one S3 bucket to another bucket in a different region. Enabling Cross-Region Replication for the S3 bucket used for CISA Cyber Essentials ensures the availability and durability of the stored data, improves disaster recovery capability, and complies with the data replication and backup requirements.
Troubleshooting Steps:
If there are any issues with enabling Cross-Region Replication for the S3 bucket, consider following these troubleshooting steps:
- 1.
Verify IAM Permissions:
- Ensure that the IAM user or role used has sufficient permissions to enable Cross-Region Replication. Required IAM permissions include
,s3:GetBucketReplication
, ands3:PutReplicationConfiguration
for both source and destination buckets.s3:ListBucket
- 2.
Check Bucket Ownership:
- Make sure that you have the necessary permissions and ownership of both the source and destination buckets.
- 3.
Verify S3 Bucket Versioning:
- Cross-Region Replication requires versioning to be enabled for both the source and destination buckets. Confirm that bucket versioning is enabled in both buckets.
- 4.
Check Bucket Lifecycle Policies:
- If there are active lifecycle policies defined on either the source or destination bucket, ensure that they do not interfere with Cross-Region Replication.
- 5.
Verify Bucket Names:
- Confirm that the bucket names provided as the source and destination are correctly entered with the correct region.
- 6.
Review Replication Configuration:
- Double-check the replication configuration settings, such as prefix filters, storage class settings, or replication rules, to ensure they are correctly set according to your requirements.
- 7.
Check Region Availability:
- Ensure that the selected destination region is available and accessible by the IAM user or role used for enabling Cross-Region Replication.
Necessary Codes:
There are no specific codes required to enable Cross-Region Replication for S3 buckets. Instead, the configuration is done using the S3 Management Console or programmatically through the AWS Management Console, AWS SDKs, or AWS CLI.
Step-by-Step Guide for Enabling Cross-Region Replication:
- 1.
Log in to the AWS Management Console.
- 2.
Navigate to the S3 service.
- 3.
Select the source S3 bucket that contains the CISA Cyber Essentials data.
- 4.
Click on the "Management" tab.
- 5.
Under "Replication," click on "Add rule."
- 6.
On the "Add rule" page, configure the following settings:
- Source: Select the source bucket and region.
- Destination: Select the destination bucket and region.
- Storage class and encryption settings (optional).
- Replication rule name (optional).
- Filters (optional), such as prefix or tag filters.
- 7.
Click "Next."
- 8.
Review the replication configuration summary.
- 9.
Click "Save."
- 10.
The Cross-Region Replication configuration will be applied, and objects in the source bucket will be automatically replicated to the destination bucket in the specified region.
Note: The time it takes to replicate objects from the source to the destination bucket depends on the size and number of objects. Large objects or high object counts might take some time to replicate fully.
Ensure to monitor the replication progress and regularly check the S3 Management Console for any errors or delays in the replication process.
Remember to have sufficient storage capacity and consider the costs associated with data transfer and storage in the destination region.
By enabling Cross-Region Replication for the S3 bucket used for CISA Cyber Essentials, you ensure data redundancy, availability, and compliance with best practices for disaster recovery and regulatory requirements.