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Question 826 - SAA-C03 discussion

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A company has applications that run in an organization in AWS Organizations. The company outsources operational support of the applications. The company needs to provide access for the external support engineers without compromising security.

The external support engineers need access to the AWS Management Console. The external support engineers also need operating system access to the company's fleet of Amazon EC2 instances that run Amazon Linux in private subnets.

Which solution will meet these requirements MOST securely?

A.
Confirm that AWS Systems Manager Agent (SSM Agent) is installed on all instances. Assign an instance profile with the necessary policy to connect to Systems Manager. Use AWS 1AM Identity Center to provide the external support engineers console access. Use Systems Manager Session Manager to assign the required permissions.
Answers
A.
Confirm that AWS Systems Manager Agent (SSM Agent) is installed on all instances. Assign an instance profile with the necessary policy to connect to Systems Manager. Use AWS 1AM Identity Center to provide the external support engineers console access. Use Systems Manager Session Manager to assign the required permissions.
B.
Confirm that AWS Systems Manager Agent {SSM Agent) is installed on all instances. Assign an instance profile with the necessary policy to connect to Systems Manager. Use Systems Manager Session Manager to provide local 1AM user credentials in each AWS account to the external support engineers for console access.
Answers
B.
Confirm that AWS Systems Manager Agent {SSM Agent) is installed on all instances. Assign an instance profile with the necessary policy to connect to Systems Manager. Use Systems Manager Session Manager to provide local 1AM user credentials in each AWS account to the external support engineers for console access.
C.
Confirm that all instances have a security group that allows SSH access only from the external support engineers source IP address ranges. Provide local 1AM user credentials in each AWS account to the external support engineers for console access. Provide each external support engineer an SSH key pair to log in to the application instances.
Answers
C.
Confirm that all instances have a security group that allows SSH access only from the external support engineers source IP address ranges. Provide local 1AM user credentials in each AWS account to the external support engineers for console access. Provide each external support engineer an SSH key pair to log in to the application instances.
D.
Create a bastion host in a public subnet. Set up the bastion host security group to allow access from only the external engineers' IP address ranges Ensure that all instances have a security group that allows SSH access from the bastion host. Provide each external support engineer an SSH key pair to log in to the application instances. Provide local account 1AM user credentials to the engineers for console access.
Answers
D.
Create a bastion host in a public subnet. Set up the bastion host security group to allow access from only the external engineers' IP address ranges Ensure that all instances have a security group that allows SSH access from the bastion host. Provide each external support engineer an SSH key pair to log in to the application instances. Provide local account 1AM user credentials to the engineers for console access.
Suggested answer: A

Explanation:

This solution provides the most secure access for external support engineers with the least exposure to potential security risks.

AWS Systems Manager (SSM) and Session Manager: Systems Manager Session Manager allows secure and auditable access to EC2 instances without the need to open inbound SSH ports or manage SSH keys. This reduces the attack surface significantly. The SSM Agent must be installed and configured on all instances, and the instances must have an instance profile with the necessary IAM permissions to connect to Systems Manager.

IAM Identity Center: IAM Identity Center provides centralized management of access to the AWS Management Console for external support engineers. By using IAM Identity Center, you can control console access securely and ensure that external engineers have the appropriate permissions based on their roles.

Why Not Other Options?:

Option B (Local IAM user credentials): This approach is less secure because it involves managing local IAM user credentials and does not leverage the centralized management and security benefits of IAM Identity Center.

Option C (Security group with SSH access): Allowing SSH access opens up the infrastructure to potential security risks, even when restricted by IP addresses. It also requires managing SSH keys, which can be cumbersome and less secure.

Option D (Bastion host): While a bastion host can secure SSH access, it still requires managing SSH keys and opening ports. This approach is less secure and more operationally intensive compared to using Session Manager.

AWS

Reference:

AWS Systems Manager Session Manager - Documentation on using Session Manager for secure instance access.

AWS IAM Identity Center - Overview of IAM Identity Center and its capabilities for managing user access.


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asked 16/09/2024
Liam Harris
51 questions
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