NashTech Insights

How to strengthen Your Infrastructure Security with Terraform: Best Practices

Rahul Miglani
Rahul Miglani
Table of Contents
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In today’s digital landscape, ensuring the security of your infrastructure is paramount. As organizations embrace infrastructure as code (IaC) practices, it becomes essential to integrate security into every layer of the development and deployment process. Terraform, a popular infrastructure provisioning tool, offers robust features to enhance the sec posture of your infrastructure. In this blog post, we will explore best practices for securing your infrastructure using Terraform and provide an example Terraform code snippet to demonstrate these practices.

Use Parameterised Input Variables:

Hardcoding sensitive information such as passwords, access keys, or tokens within your Terraform configuration files poses a sec risk. Instead, leverage parameterised input variables to pass these values securely. Store sensitive data in a secrets management system or environment variables and reference them within your Terraform code.

Example code snippet:

Implement Least Privilege:

Adopt the principle of least privilege to restrict access to your infrastructure resources. When defining roles and permissions within your Terraform code, grant only the necessary privileges to each component. Avoid using overly permissive permissions and regularly review and update access controls.

Enable Encryption at Rest and in Transit:

Ensure that your data is protected both at rest and in transit. Utilize encryption mechanisms provided by your cloud provider or service. Enable encryption for storage volumes, databases, and communication channels, such as TLS/SSL, within your Terraform configurations.

Leverage Security Groups and Network Access Controls:

Implement sec groups and network access controls to restrict network traffic to and within your infrastructure. Define granular rules that allow only necessary communication and block unauthorized access. Regularly review and update these rules to align with your evolving sec requirements.

Example code snippet :

Regularly Update Terraform Versions:

Stay updated with the latest Terraform versions to leverage security patches and bug fixes. Keeping your Terraform installation current helps mitigate potential security vulnerabilities and ensures you have access to the latest security features.

Implement Infrastructure Auditing and Monitoring:

Integrate infrastructure auditing and monitoring tools into your Terraform workflows. Continuously monitor your infrastructure for any security breaches, unauthorized access attempts, or configuration drift. Leverage tools like AWS CloudTrail, Azure Monitor, or third-party solutions to gain insights into the security state of your infrastructure.


Securing your infrastructure is a critical aspect of modern IT operations. By following best practices such as using parameterized input variables, implementing least privilege, enabling encryption, leveraging security groups, and regularly updating Terraform versions, you can significantly enhance your infrastructure security posture.

In this blog post, we explored key security practices for Terraform and provided an example Terraform code snippet to demonstrate their implementation. By integrating security considerations into your infrastructure-as-code workflows, you can build a robust and resilient infrastructure while ensuring the confidentiality, integrity, and availability of your systems.

Embrace these best practices, stay vigilant, and continue to adapt to emerging security threats to protect your infrastructure effectively.

Rahul Miglani

Rahul Miglani

Rahul Miglani is Vice President at NashTech and Heads the DevOps Competency and also Heads the Cloud Engineering Practice. He is a DevOps evangelist with a keen focus to build deep relationships with senior technical individuals as well as pre-sales from customers all over the globe to enable them to be DevOps and cloud advocates and help them achieve their automation journey. He also acts as a technical liaison between customers, service engineering teams, and the DevOps community as a whole. Rahul works with customers with the goal of making them solid references on the Cloud container services platforms and also participates as a thought leader in the docker, Kubernetes, container, cloud, and DevOps community. His proficiency includes rich experience in highly optimized, highly available architectural decision-making with an inclination towards logging, monitoring, security, governance, and visualization.

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