Restrict Public Access to DMS Replication Instances
Ensures DMS replication instances are not publicly accessible, maintaining secure network configuration.
| Rule | Database Migration Service replication instances should not be public |
| Framework | AWS Foundational Security Best Practices |
| Severity | ✔ Critical |
Description
Replication instances of the Database Migration Service should not be set to public in order to adhere to the AWS Foundational Security Best Practices. Allowing public access to replication instances can expose sensitive data and make them vulnerable to unauthorized access, potentially leading to security breaches. It is essential to ensure that replication instances are kept private to maintain the confidentiality and integrity of the data being migrated.
Troubleshooting Steps
If a replication instance is mistakenly set to public, follow the below steps to rectify the issue:
- 1.Check Instance Settings: Verify the security group settings of the replication instance to confirm if it is publicly accessible.
- 2.Security Group Configuration: Update the associated security group to restrict access to the replication instance.
- 3.Network Access Control Lists (ACLs): Ensure that the network ACLs are correctly configured to prevent public access.
- 4.VPC Configuration: Review the VPC settings to confirm that the replication instance is not publicly accessible.
- 5.Encryption: Secure the replication instance by enabling encryption at rest and in transit for added security.
Remediation Steps
To remediate the issue of a public replication instance, follow the given steps:
- 1.Access AWS Console: Log in to the AWS Management Console.
- 2.Navigate to DMS Service: Go to the Database Migration Service dashboard.
- 3.Select Replication Instance: Choose the replication instance that is set to public.
- 4.Update Security Group: Modify the associated security group to restrict access.
- 5.Update VPC Settings: Ensure that the VPC configuration does not allow public access to the instance.
- 6.Encryption Configuration: Enable encryption at rest and in transit for enhanced security.
- 7.Test Connectivity: Validate connectivity to confirm that required services can still communicate with the replication instance.
- 8.Monitor Security Groups: Regularly monitor and review security group settings to prevent misconfigurations.
Conclusion
Maintaining the Database Migration Service replication instances as private is crucial for ensuring the security and protection of data during migration processes. By following the recommended remediation steps, organizations can prevent unauthorized access and potential security risks associated with public replication instances.