IAM Best Practices and Security Audit

This final lesson brings together everything we have covered and provides a comprehensive set of best practices for IAM security, along with tools and techniques for auditing your AWS environment.

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IAM Best Practices Checklist

1. Protect the Root User

The root user has unrestricted access to everything in your account. Treat it like the master key to a building:

• Enable MFA on the root user immediately after account creation.
• Do not create access keys for the root user.
• Never use the root user for day-to-day tasks.
• Use a strong, unique password and store it in a secure password manager.
• Set up account-level alternative contacts (billing, operations, security) so the root email is not needed for routine communications.

2. Create Individual IAM Users

Every person who needs access to your AWS account should have their own IAM user. This ensures:

• Accountability — CloudTrail logs show exactly who performed each action.
• Credential independence — disabling one user does not affect others.
• Tailored permissions — each user gets only what they need.

3. Use Groups for Permissions