RDS instances should be deployed inside of a VPC

rds
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Description

This validation verifies if an Amazon RDS instance is set up in an EC2-VPC.

VPCs offer various network security measures to protect RDS resources, such as VPC Endpoints, network ACLs, and security groups. To utilize these security measures effectively, it is advisable to deploy your RDS instances within an EC2-VPC.

Remediation

For details on deploying RDS instances to a VPC, please refer to the Updating the VPC for a DB instance section in the Amazon RDS User Guide.