AWS IAM Summary – Key Concepts and Best Practices

AWS Identity and Access Management (IAM) is a fundamental service that helps manage access to AWS resources securely. Here’s a concise summary of its key components and best practices.

1. IAM Users

• Represents an actual physical person within your organization.
• Users sign in using a password for the AWS Management Console.

2. IAM Groups

• Groups help manage multiple users by applying permissions collectively.
• Policies (JSON documents defining permissions) can be attached to groups instead of individual users.

3. IAM Roles

• Roles are temporary identities assigned to AWS services (e.g., EC2 instances, Lambda, etc.).
• They follow the principle of least privilege and do not require long-term credentials.

4. IAM Security Best Practices

• Enable Multi-Factor Authentication (MFA) to add an extra layer of security.
• Set a strong password policy to enforce complexity and expiration rules.
• Use IAM policies to grant permissions based on the least privilege principle.

5. IAM Access Methods

• AWS CLI – Manage AWS services via the command line.