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Question 467 - SAP-C02 discussion

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A company needs to improve the security of its web-based application on AWS. The application uses Amazon CloudFront with two custom origins. The first custom origin routes requests to an Amazon API Gateway HTTP API. The second custom origin routes traffic to an Application Load Balancer (ALB) The application integrates with an OpenlD Connect (OIDC) identity provider (IdP) for user management.

A security audit shows that a JSON Web Token (JWT) authorizer provides access to the API The security audit also shows that the ALB accepts requests from unauthenticated users

A solutions architect must design a solution to ensure that all backend services respond to only authenticated users

Which solution will meet this requirement?

A.
Configure the ALB to enforce authentication and authorization by integrating the ALB with the IdP Allow only authenticated users to access the backend services
Answers
A.
Configure the ALB to enforce authentication and authorization by integrating the ALB with the IdP Allow only authenticated users to access the backend services
B.
Modify the CloudFront configuration to use signed URLs Implement a permissive signing policy that allows any request to access the backend services
Answers
B.
Modify the CloudFront configuration to use signed URLs Implement a permissive signing policy that allows any request to access the backend services
C.
Create an AWS WAF web ACL that filters out unauthenticated requests at the ALB level. Allow only authenticated traffic to reach the backend services.
Answers
C.
Create an AWS WAF web ACL that filters out unauthenticated requests at the ALB level. Allow only authenticated traffic to reach the backend services.
D.
Enable AWS CloudTrail to log all requests that come to the ALB Create an AWS Lambda function to analyze the togs and block any requests that come from unauthenticated users.
Answers
D.
Enable AWS CloudTrail to log all requests that come to the ALB Create an AWS Lambda function to analyze the togs and block any requests that come from unauthenticated users.
Suggested answer: A

Explanation:

Integrate ALB with OIDC IdP:

In the AWS Management Console, navigate to the Application Load Balancer (ALB) settings.

Configure the ALB to use the OpenID Connect (OIDC) IdP for authentication. This ensures that all requests routed through the ALB are authenticated using the IdP.

Set Up Authentication Rules:

Create a listener rule on the ALB that requires authentication. This rule will forward requests to the IdP for user authentication before allowing access to the backend services.

Restrict Unauthenticated Access:

Ensure the ALB only forwards requests to backend services if the user is authenticated. Unauthenticated requests should be blocked or redirected to the IdP for authentication.

Update CloudFront Configuration:

Modify the CloudFront distribution to forward authenticated requests to the ALB. Ensure that the ALB and API Gateway accept only requests coming through the CloudFront distribution to enforce consistent authentication and security.

By enforcing authentication at the ALB level, you ensure that all backend services are accessed only by authenticated users, enhancing the overall security of the web application

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asked 16/09/2024
Alexandru Ouatu
47 questions
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