AWS Certified CloudOps Engineer Associate SOA-C03 Practice Question
A compliance mandate requires that no member account in the company's AWS Organization can provision resources outside the us-east-1 or us-west-2 Regions and that Amazon Redshift is completely blocked. The CloudOps team needs a centrally managed, preventive control that applies to existing and future accounts without modifying individual IAM roles. Which solution meets these requirements?
Create an IAM permission boundary in each account that allows only approved Regions and excludes Redshift actions, then attach it to every user and role.
Enable an AWS Config rule that detects resources created in unauthorized Regions or any Redshift cluster and invokes Systems Manager Automation to delete them.
Deploy AWS Control Tower and enable guardrails to disable unsupported Regions and block the Redshift service across the organization.
Attach a Service Control Policy to the organization root that denies all actions when aws:RequestedRegion is anything other than us-east-1 or us-west-2 and denies redshift:* for all principals.
Service Control Policies (SCPs) are organization-level guardrails that apply to every principal in every account, including the root user. An SCP attached to the organization's root can include two explicit Deny statements: one that denies all actions if the aws:RequestedRegion condition is not us-east-1 or us-west-2, and another that denies redshift: actions everywhere. Because SCPs are evaluated before IAM policies, the restrictions are preventive and automatically apply to all current and newly created accounts.
IAM permission boundaries (or account-level IAM policies) must be attached to each role or user and can be removed by administrators, making them harder to enforce consistently. AWS Config with remediation is detective; resources are created before they are deleted, which does not satisfy the preventive requirement. AWS Control Tower guardrails cannot currently disable individual services such as Redshift in every account and introduce additional overhead that is unnecessary for this narrow requirement.
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What are Service Control Policies (SCPs) in AWS Organizations?
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Why are SCPs considered a preventive control, while AWS Config rules are detective?
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AWS Certified CloudOps Engineer Associate SOA-C03
Security and Compliance
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