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Question 355 - SAP-C02 discussion

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A company is using AWS Control Tower to manage AWS accounts in an organization in AWS Organizations. The company has an OU that contains accounts. The company must prevent any new or existing Amazon EC2 instances in the OUs accounts from gaining a public IP address.

Which solution will meet these requirements?

A.
Configure all instances in each account in the OU to use AWS Systems Manager. Use a Systems Manager Automation runbook to prevent public IP addresses from being attached to the instances.
Answers
A.
Configure all instances in each account in the OU to use AWS Systems Manager. Use a Systems Manager Automation runbook to prevent public IP addresses from being attached to the instances.
B.
Implement the AWS Control Tower proactive control to check whether instances in the OU's accounts have a public IP address. Set the AssociatePubIicIpAddress property to False. Attach the proactive control to the OU.
Answers
B.
Implement the AWS Control Tower proactive control to check whether instances in the OU's accounts have a public IP address. Set the AssociatePubIicIpAddress property to False. Attach the proactive control to the OU.
C.
Create an SCP that prevents the launch of instances that have a public IP address. Additionally, configure the SCP to prevent the attachment of a public IP address to existing instances. Attach the SCP to the OU.
Answers
C.
Create an SCP that prevents the launch of instances that have a public IP address. Additionally, configure the SCP to prevent the attachment of a public IP address to existing instances. Attach the SCP to the OU.
D.
Create an AWS Config custom rule that detects instances that have a public IP address. Configure a remediation action that uses an AWS Lambda function to detach the public IP addresses from the instances.
Answers
D.
Create an AWS Config custom rule that detects instances that have a public IP address. Configure a remediation action that uses an AWS Lambda function to detach the public IP addresses from the instances.
Suggested answer: C

Explanation:

This option will meet the requirements of preventing any new or existing EC2 instances in the OU's accounts from gaining a public IP address. An SCP is a policy that you can attach to an OU or an account in AWS Organizations to define the maximum permissions for the entities in that OU or account. By creating an SCP that denies the ec2:RunInstances and ec2:AssociateAddress actions when the value of the aws:RequestTag/aws:PublicIp condition key is true, you can prevent any user or role in the OU from launching instances that have a public IP address or attaching a public IP address to existing instances. This will effectively enforce a security best practice and reduce the risk of unauthorized access to your EC2 instances.

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asked 16/09/2024
Marcel Wienhusen
43 questions
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