AWS, Cloud Computing

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AWS Config Rules and Remediation with AWS CloudFormation


In the dynamic world of cloud computing, maintaining optimal configurations for your AWS resources is crucial for security, compliance, and performance. AWS Config provides a powerful toolset for continuously monitoring and evaluating your AWS resource configurations against desired guidelines. AWS Config Rules take this a step further by enabling automated evaluations and, when needed, remediation of non-compliant configurations. This blog delves into the concepts of AWS Config Rules, remediation, and how you can implement them using AWS CloudFormation.

AWS Config Rules

AWS Config Rules allow you to define guidelines for your AWS resources, ensuring they adhere to best practices, compliance standards, or internal policies. These rules continuously monitor your resources and provide insights into compliance status. When a rule identifies a non-compliance issue, it triggers an evaluation, generating Config Rule reports and notifications.

AWS Config Rules play a pivotal role in ensuring the compliance and security of AWS resources. Combining AWS Config Rules with AWS Security Hub (Sechub) and Amazon GuardDuty enhances security by providing continuous monitoring, automated compliance checks, and threat detection.

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AWS Config Rule Components

  1. Rule Definition: Defines the conditions resources must meet to be compliant.
  2. Scope: Specifies the AWS resource types to which the rule applies.
  3. Source: Identifies the source of the rule, whether it’s an AWS managed rule, a custom rule, or a third-party rule.
  4. Remediation: Optionally, AWS Config Rules can include automated remediation actions to correct non-compliant resources.

Understanding Remediation

Remediation involves automatically correcting non-compliant configurations identified by AWS Config Rules. It ensures that your AWS resources align with the desired state, reducing manual intervention and enhancing operational efficiency.

Benefits of Remediation

  1. Automated Corrections: Remediation automates bringing non-compliant resources back into compliance, reducing the risk of misconfigurations.
  2. Continuous Compliance: Enables continuous monitoring and enforcement of compliance standards, ensuring resources stay compliant over time.
  3. Operational Efficiency: Reduces the manual effort required to identify and rectify non-compliant configurations, allowing teams to focus on higher-value tasks.

Implementing Config Rules and Remediation with AWS CloudFormation

AWS CloudFormation simplifies the deployment and management of AWS resources, including Config Rules and remediation components.

  1. Config Rule Deployment:
  • Define the AWS Config Rule within your AWS CloudFormation template, specifying rule parameters, scope, and source.
  • Deploy the AWS CloudFormation stack to create the AWS Config Rule.

2. Remediation Lambda Function:

  • Create an AWS Lambda function that performs the necessary remediation actions.
  • Define an AWS IAM role granting the Lambda function permissions to modify resources.

3. Remediation Role and Permissions:

  • Create an AWS IAM role for AWS Config to assume when executing remediation actions.
  • Grant the AWS IAM role permissions to invoke the Lambda function and modify resources.

4. Config Rule Remediation Configuration:

  • Configure the Config Rule to include remediation actions, referencing the AWS Lambda function and associated AWS IAM role.

5. Continuous Monitoring and Remediation:

  • AWS Config continuously monitors resources for compliance.
  • When non-compliance is detected, the configured remediation actions are automatically triggered.

Key Features

  • Continuous Compliance Monitoring:

AWS Config Rules enable organizations to continuously define and enforce compliance standards for their AWS resources.

  • Automated Remediation Actions:

AWS Config Rules can be configured to include automated remediation actions that correct non-compliant configurations.

  • Integration with AWS Security Hub:

Integration with AWS Security Hub centralizes security findings and compliance data, offering a unified view of the overall security posture.

  • Support for Custom Rules:

AWS Config allows users to create custom rules tailored to their specific requirements and compliance standards.


AWS Config Rules and automated remediation through AWS CloudFormation offer an enhanced solution for maintaining compliant AWS resource configurations. This integrated approach enhances operational efficiency, reduces manual intervention, and ensures continuous compliance with organizational standards. By leveraging the power of AWS Config and AWS CloudFormation, organizations can establish a proactive and automated governance framework for their AWS environments.

Drop a query if you have any questions regarding AWS Config Rules and we will get back to you quickly.

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1. What is the primary purpose of AWS Config Rules?

ANS: – AWS Config Rules allow users to define and enforce guidelines for AWS resource configurations. They provide a mechanism for continuous monitoring and automated evaluations to ensure resources adhere to compliance standards and best practices.

2. How does an AWS Config Rule differ from a remediation action, and why are both necessary?

ANS: – The AWS Config Rule defines conditions for resource compliance and triggers evaluations. Remediation actions, on the other hand, automatically correct non-compliant configurations identified by AWS Config Rules. Both are essential for maintaining continuous compliance and reducing manual intervention.




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