Guide: AWS IAM Multi-Factor Authentication (MFA)

What is IAM MFA:
AWS Identity and Access Management (IAM) multi-factor authentication (MFA) is a security feature that requires users to provide two or more forms of identification to access AWS resources. It combines a 'something you know' factor (like a password) and a 'something you have' factor (like a hardware MFA device).

Why is it Important:
IAM MFA is crucial because it adds an additional layer of security to the AWS Management Console, AWS CLI and AWS API operations. It protects your AWS resources by requiring users to validate their identities via multiple verification methods.

How It Works:
When a user signs in, they first enter their username and password. They're then prompted to enter an authentication code from their configured MFA device. To authenticate successfully, they must provide both the valid password and a valid MFA code.

Exam Tips:
Remember the following when answering questions about IAM MFA in an exam:

• MFA is mandatory for root accounts.
• Virtual MFA devices use software applications to generate MFA codes.
• Hardware MFA devices are available from AWS.
• MFA can be enabled for IAM users and root users.
• By activating MFA delete, you can protect your S3 buckets.