What are AWS IAM permission boundaries?

What are AWS IAM permission boundaries?

AWS IAM permission boundaries are advanced features that define the maximum permissions a user or role can have. They act as a guardrail, ensuring that even if a user has permissions to perform certain actions, they cannot exceed the limits set by the permission boundary.

How do I set up permission boundaries in AWS?

To set up permission boundaries, you first create a policy that defines the permissions. Then, when creating or updating a user or role, you can attach this policy as a permission boundary.

Can permission boundaries be used with service control policies?

Yes, permission boundaries can be used alongside service control policies (SCPs) in AWS Organizations. While SCPs set the maximum permissions for accounts, permission boundaries limit the permissions for individual IAM roles or users.

What happens if a permission boundary denies a permission?

If a permission boundary denies a permission, the user or role cannot perform that action, even if they have been granted that permission through other policies.