Exam AWS Certified Solutions Architect - Associate SAA-C03 topic 1 question 3 discussion

aws:PrincipalOrgID Validates if the principal accessing the resource belongs to an account in your organization.

Condition keys: AWS provides condition keys that you can query to provide more granular control over certain actions. The following condition keys are especially useful with AWS Organizations: aws:PrincipalOrgID – Simplifies specifying the Principal element in a resource-based policy. This global key provides an alternative to listing all the account IDs for all AWS accounts in an organization. Instead of listing all of the accounts that are members of an organization, you can specify the organization ID in the Condition element. aws:PrincipalOrgPaths – Use this condition key to match members of a specific organization root, an OU, or its children. The aws:PrincipalOrgPaths condition key returns true when the principal (root user, IAM user, or role) making the request is in the specified organization path. A path is a text representation of the structure of an AWS Organizations entity.

Answer a for sure

Add the aws:PrincipalOrgID global condition key with a reference to the organization ID to the S3 bucket policy. This is the most efficient and low-overhead solution. The aws:PrincipalOrgID condition key directly checks if the AWS account making the request belongs to the specified AWS Organization. This means you set the policy once, and it automatically applies to any account that joins or leaves your organization. It directly addresses the requirement of limiting access to users of accounts within the organization.

Use aws:PrincipalOrgID in the bucket policy for a clean, scalable, and low-maintenance solution to restrict access to AWS Organization members.

A: use aws PrincipalOrgID global condition key with a with a reference to the organization ID to the S3 bucket policy is the correct answer because the company wants to limit access to only user within the organization. B: is also be considered since the company wanted to limit access to s3 bucket within organization not mention to specific Organizational unit. if you or the company wanted to restrict access to S3 bucket by specific OU consider option B C: use AWS cloudtrail to monitor action of users within organization, which is more complex and high operational overhead D: tag each user and use aws:PrincipalTag global condition key to the S3 bucket policy. You would have to tag each user manually, which is required more work overhead

This solution es the most simple comparing to other alternatives, just modify one parameter. aws:PrincipalOrgID

aws:PrincipalOrgID - global key provides an alternative to listing all the account IDs for all AWS accounts in an organization.

Not B because: aws:PrincipalOrgPaths require you change the OU path when the user switch to another OU Not C because: you need to put effort to update policy which introduces operational overhead. Not D because: require a good tag management across multiple accounts. Like team "HR", team "QA", team "Security" and so forth. Also need to update if the user is moved to another team with different tag.

PrincipalOrgID is used to validate that the iam user accesing data is from the organisation only

aws:PrincipalOrgID is the most efficient and straightforward way to restrict access to resources to entities within an AWS Organization. It reduces the need for constant monitoring, tagging, or OU management, making it the optimal solution for scenarios requiring minimal operational overhead.

use a new condition key, aws:PrincipalOrgID, in these policies to require all principals accessing the resource to be from an account (including the master account) in the organization. For example, let’s say you have an Amazon S3 bucket policy and you want to restrict access to only principals from AWS accounts inside of your organization. To accomplish this, you can define the aws:PrincipalOrgID condition and set the value to your organization ID in the bucket policy. Your organization ID is what sets the access control on the S3 bucket. Additionally, when you use this condition, policy permissions apply when you add new accounts to this organization without requiring an update to the policy.

Answered by ChatGPT with an explanation. The correct solution that meets these requirements with the least amount of operational overhead is Option A: Add the aws PrincipalOrgID global condition key with a reference to the organization ID to the S3 bucket policy. Option A involves adding the aws:PrincipalOrgID global condition key to the S3 bucket policy, which allows you to specify the organization ID of the accounts that you want to grant access to the bucket. By adding this condition to the policy, you can limit access to the bucket to only users of accounts within the organization.

This is the least operationally overhead solution because it requires only a single configuration change to the S3 bucket policy, which will allow access to the bucket for all users within the organization. The other options require ongoing management and maintenance. Option B requires the creation and maintenance of organizational units for each department. Option C requires monitoring of specific CloudTrail events and updates to the S3 bucket policy based on those events. Option D requires the creation and maintenance of tags for each user that needs access to the bucket.

Option A proposes adding the aws PrincipalOrgID global condition key with a reference to the organization ID to the S3 bucket policy. This would limit access to the S3 bucket to only users of accounts within the organization in AWS Organizations, as the aws PrincipalOrgID condition key can check if the request is coming from within the organization.

B. Create an organizational unit (OU) for each department. Add the AWS: Principal Org Paths global condition key to the S3 bucket policy. This solution allows for the S3 bucket to only be accessed by users within the organization in AWS Organizations while minimizing operational overhead by organizing users into OUs and using a single global condition key in the bucket policy. Option A, adding the Principal ID global condition key, would require frequent updates to the policy as new users are added or removed from the organization. Option C, using CloudTrail to monitor events, would require manual updating of the policy based on the events. Option D, tagging each user, would also require manual tagging updates and may not be scalable for larger organizations with many users.

Keywords: - Company uses AWS Organizations - Limit access to this S3 bucket to only users of accounts within the organization in AWS Organizations - LEAST amount of operational overhead A: Correct - We just add PrincipalOrgID global condition key with a reference to the organization ID to the S3 bucket policy B: Incorrect - We can limit access by this way but this will take more amount of operational overhead C: Incorrect - AWS CloudTrail only log API events, we can not prevent user access to S3 bucket. For update S3 bucket policy to make it work you should manually add each account -> this way will not be cover in case of new user is added to Organization. D: Incorrect - We can limit access by this way but this will take most amount of operational overhead