- A
AWS Config
Why wrong: AWS Config evaluates resource configurations against desired policies and can detect non-compliant security groups. However, it does not provide centralized enforcement across multiple accounts or automatic remediation of the rules themselves. It is a detective control, not a preventive or centralized management service for security groups.
- B
AWS Firewall Manager
AWS Firewall Manager is designed to centrally configure and manage firewall rules across accounts and resources in AWS Organizations. It can enforce a common security group policy, automatically apply it to new VPCs and security groups, and remediate existing non-compliant resources, meeting all the stated requirements.
- C
Amazon GuardDuty
Why wrong: Amazon GuardDuty is a threat detection service that continuously monitors for malicious activity and unauthorized behavior. It does not enforce or manage security group rules; it only alerts on suspicious network traffic.
- D
AWS Identity and Access Management (IAM)
Why wrong: IAM is used to manage access permissions for users, groups, and roles. It controls who can perform actions on AWS resources but does not manage network firewall rules such as security group configurations.
Quick Answer
The answer is AWS Firewall Manager, as it is the only service designed to centrally enforce security group rules across all accounts in AWS Organizations. Firewall Manager allows you to define a common security policy—such as denying SSH access from 0.0.0.0/0—and automatically apply it to all existing and newly created VPCs and security groups, while also remediating non-compliant resources by removing violating rules. On the AWS Certified Cloud Practitioner CLF-C02 exam, this question tests your understanding of centralized governance versus individual account management; a common trap is confusing Firewall Manager with Security Groups (which are per-resource) or AWS Config (which detects but does not automatically remediate). Remember that Firewall Manager is the “enforcer” for security policies across your entire organization, making it the go-to for proactive, scalable compliance. A helpful memory tip: think “Firewall Manager = Firewall Manager across accounts,” where the “Manager” implies centralized control and automatic rule enforcement.
CLF-C02 Security and Compliance Practice Question
This CLF-C02 practice question tests your understanding of security and compliance. Match the stated requirement to the specific cloud service, access model, or configuration option — many options are valid in isolation but not for this scenario. A key principle to apply: aWS Firewall Manager centrally manages firewall rules across AWS Organizations.. Once you have made your selection, read the full explanation to reinforce the concept and understand why each distractor is designed to mislead on exam day.
A company uses AWS Organizations to manage multiple accounts. The security team needs to enforce a policy that restricts SSH access (port 22) from the internet (0.0.0.0/0) in all VPCs across all accounts. The team wants to centrally define the allowed rules and automatically apply them to newly created VPCs and security groups, while also automatically remediating any existing non-compliant security groups. Which AWS service should the team use?
Answer choices
Why each option matters
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
AWS Firewall Manager
AWS Firewall Manager is the correct service because it provides centralized management of firewall rules across all accounts in AWS Organizations. It can enforce a common security group rule to deny SSH access from 0.0.0.0/0, automatically apply this policy to new VPCs and security groups, and remediate non-compliant existing security groups by removing or replacing violating rules. This meets the requirement for both proactive enforcement and automated remediation at scale.
Key principle: AWS Firewall Manager centrally manages firewall rules across AWS Organizations.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
AWS Config
Why it's wrong here
AWS Config evaluates resource configurations against desired policies and can detect non-compliant security groups. However, it does not provide centralized enforcement across multiple accounts or automatic remediation of the rules themselves. It is a detective control, not a preventive or centralized management service for security groups.
- ✓
AWS Firewall Manager
Why this is correct
AWS Firewall Manager is designed to centrally configure and manage firewall rules across accounts and resources in AWS Organizations. It can enforce a common security group policy, automatically apply it to new VPCs and security groups, and remediate existing non-compliant resources, meeting all the stated requirements.
Related concept
AWS Firewall Manager centrally manages firewall rules across AWS Organizations.
- ✗
Amazon GuardDuty
Why it's wrong here
Amazon GuardDuty is a threat detection service that continuously monitors for malicious activity and unauthorized behavior. It does not enforce or manage security group rules; it only alerts on suspicious network traffic.
- ✗
AWS Identity and Access Management (IAM)
Why it's wrong here
IAM is used to manage access permissions for users, groups, and roles. It controls who can perform actions on AWS resources but does not manage network firewall rules such as security group configurations.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates often confuse AWS Config's detection capabilities with enforcement, assuming it can automatically fix non-compliant resources without additional automation, while Firewall Manager is the native service for centralized, automated security group policy enforcement across an organization.
Detailed technical explanation
How to think about this question
AWS Firewall Manager uses a policy-based approach where you define a security group policy with a baseline rule set (e.g., deny SSH from 0.0.0.0/0) and a remediation action (e.g., remove non-compliant rules). Under the hood, it leverages AWS Organizations and AWS Config to continuously evaluate and automatically apply the policy across member accounts, including newly created VPCs and security groups, without requiring manual intervention. A real-world scenario is a multi-account environment where a security team must ensure no VPC has an open SSH port to the internet, and Firewall Manager can automatically fix violations as soon as they are created.
KKey Concepts to Remember
- AWS Firewall Manager centrally manages firewall rules across AWS Organizations.
- It can enforce security group policies across multiple accounts.
- Firewall Manager automatically applies policies to new and existing resources.
- It provides automatic remediation for non-compliant security groups.
TExam Day Tips
- Watch for words such as best, first, most likely and least administrative effort.
- Review why wrong options are wrong, not only why the correct option is correct.
Key takeaway
AWS Firewall Manager centrally manages firewall rules across AWS Organizations.
Real-world example
How this comes up in practice
A company's IT admin needs to give a contractor read-only access to production logs without sharing account credentials. Using role-based access control (RBAC) and temporary scoped permissions — not a permanent shared password — is the correct pattern. Questions like this test whether you can apply least-privilege access across cloud identity services.
What to study next
Got this wrong? Here's your next step.
Review aWS Firewall Manager centrally manages firewall rules across AWS Organizations., then practise related CLF-C02 questions on the same topic to reinforce the concept.
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Security and Compliance — study guide chapter
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Security and Compliance practice questions
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FAQ
Questions learners often ask
What does this CLF-C02 question test?
Security and Compliance — This question tests Security and Compliance — AWS Firewall Manager centrally manages firewall rules across AWS Organizations..
What is the correct answer to this question?
The correct answer is: AWS Firewall Manager — AWS Firewall Manager is the correct service because it provides centralized management of firewall rules across all accounts in AWS Organizations. It can enforce a common security group rule to deny SSH access from 0.0.0.0/0, automatically apply this policy to new VPCs and security groups, and remediate non-compliant existing security groups by removing or replacing violating rules. This meets the requirement for both proactive enforcement and automated remediation at scale.
What should I do if I get this CLF-C02 question wrong?
Review aWS Firewall Manager centrally manages firewall rules across AWS Organizations., then practise related CLF-C02 questions on the same topic to reinforce the concept.
What is the key concept behind this question?
AWS Firewall Manager centrally manages firewall rules across AWS Organizations.
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Last reviewed: Jun 11, 2026
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