Deep Dive: IAM (Identity and Access Management)

AWS Identity and Access Management (IAM) is a critical service for managing access to your AWS account. It enables you to securely control who can access your resources and what actions they can perform. This lecture provides an overview of IAM, its components, and best practices.

1. What is IAM?

• IAM (Identity and Access Management):
  • A global service used to manage user identities, groups, and permissions for your AWS account.
  • The root account is created by default when you set up AWS.
    • Important: Only use the root account for initial setup. Avoid sharing it or using it regularly.

2. IAM Key Concepts

a. Users

• Definition: A user represents an individual person or entity in your organization.
• Purpose: Each user gets unique credentials (e.g., username, password, and access keys) to interact with AWS.

b. Groups

• Definition: A group is a collection of users with similar responsibilities.
• Purpose: Assign permissions to a group rather than individual users for easier management.
• Key Rules:
  • Groups cannot contain other groups.
  • Users can belong to multiple groups.
  • Users can exist without being in a group (though this is not recommended).

Example:

Imagine an organization with the following structure:

• Developers Group: Alice, Bob, Charles.
• Operations Group: David, Edward.
• Audit Team: Charles, David (also part of their respective groups).

This flexible setup allows you to organize permissions efficiently.