Multi-Factor Authentication with Terraform

Multi-Factor Authentication with Terraform should be fast, predictable, and enforced everywhere. Weak access controls are a breach waiting to happen. With Terraform, you can define MFA policies as code and guarantee they apply across every environment, every time.

MFA requires users to verify identity with more than one factor — something they know, something they have, or something they are. By encoding these requirements into Terraform, you remove manual steps and human error. You declare the rules once, version-control them, and deploy them automatically.

Why Combine MFA and Terraform

Terraform offers immutable infrastructure. MFA provides hardened login gates. Together they give you audit-ready compliance and real security at scale. You use provider resources to define identity platforms, set MFA enforcement on user accounts, and prevent non-compliant configurations from being provisioned.

Example: Enforcing MFA in AWS with Terraform

resource "aws_iam_user" "secure_user" {
 name = "secure-user"
}

resource "aws_iam_user_login_profile" "secure_user_login" {
 user = aws_iam_user.secure_user.name
 pgp_key = file("keybase.txt")
}

resource "aws_iam_user_policy" "mfa_policy" {
 name = "EnforceMFA"
 user = aws_iam_user.secure_user.name
 policy = <<EOT
{
 "Version": "2012-10-17",
 "Statement": [
 {
 "Effect": "Deny",
 "Action": "*",
 "Resource": "*",
 "Condition": {
 "BoolIfExists": {
 "aws:MultiFactorAuthPresent": "false"
 }
 }
 }
 ]
}
EOT
}

This configuration ensures the user cannot perform actions unless MFA is active, locking down every API call until the second factor is verified.

Best Practices

• Enforce MFA for all privileged accounts.
• Set MFA requirements in Terraform for every new user or role.
• Use Terraform plan and apply to confirm changes and prevent drift.
• Integrate state management with secure backends to protect sensitive variables.

By codifying MFA rules in Terraform, you get instant security validation in every deployment. No bypass. No excuses. Just enforced policy, reproducible anywhere you deploy.

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