Securing AWS RDS with Fine-Grained Access Control using IAM Authentication, Terraform and Serverless

Alan Tai
10 min readMay 31, 2024

Banking on security: Fine-grained RDS access control with IAM Authentication

In the high-stakes world of enterprise software development, especially for organisations like banks, safeguarding sensitive data is critical. Traditional database user management with static credentials can become a security nightmare in complex environments. Imagine a bustling bank with a multitude of microservices — card payments, loan processing, fraud detection, and customer portals — all requiring access to the central customer database. Managing individual employees and services accounts and permissions across these services can be a logical tangled web, fraught with the risk of human error and potential breaches.

Here’s where IAM Authentication for AWS RDS emerges as a game-changer. By leveraging the power of IAM, you can achieve fine-grained access control for your RDS databases, ensuring only authorised services and users can access specific data within the database. This not only simplifies management but also bolsters security by minimising the attack surface.

This article delves into the world of IAM Authentication for RDS, guiding you through the process of implementing robust access…

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