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Question 449 - SAP-C02 discussion

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A medical company is running a REST API on a set of Amazon EC2 instances The EC2 instances run in an Auto Scaling group behind an Application Load Balancer (ALB) The ALB runs in three public subnets, and the EC2 instances run in three private subnets The company has deployed an Amazon CloudFront distribution that has the ALB as the only origin

Which solution should a solutions architect recommend to enhance the origin security?

A.
Store a random string in AWS Secrets Manager Create an AWS Lambda function for automatic secret rotation Configure CloudFront to inject the random string as a custom HTTP header for the origin request Create an AWS WAF web ACL rule with a string match rule for the custom header Associate the web ACL with the ALB
Answers
A.
Store a random string in AWS Secrets Manager Create an AWS Lambda function for automatic secret rotation Configure CloudFront to inject the random string as a custom HTTP header for the origin request Create an AWS WAF web ACL rule with a string match rule for the custom header Associate the web ACL with the ALB
B.
Create an AWS WAF web ACL rule with an IP match condition of the CloudFront service IP address ranges Associate the web ACL with the ALB Move the ALB into the three private subnets
Answers
B.
Create an AWS WAF web ACL rule with an IP match condition of the CloudFront service IP address ranges Associate the web ACL with the ALB Move the ALB into the three private subnets
C.
Store a random string in AWS Systems Manager Parameter Store Configure Parameter Store automatic rotation for the string Configure CloudFront to inject the random string as a custom HTTP header for the origin request Inspect the value of the custom HTTP header, and block access in the ALB
Answers
C.
Store a random string in AWS Systems Manager Parameter Store Configure Parameter Store automatic rotation for the string Configure CloudFront to inject the random string as a custom HTTP header for the origin request Inspect the value of the custom HTTP header, and block access in the ALB
D.
Configure AWS Shield Advanced. Create a security group policy to allow connections from CloudFront service IP address ranges. Add the policy to AWS Shield Advanced, and attach the policy to the ALB
Answers
D.
Configure AWS Shield Advanced. Create a security group policy to allow connections from CloudFront service IP address ranges. Add the policy to AWS Shield Advanced, and attach the policy to the ALB
Suggested answer: A

Explanation:

Store Secret in AWS Secrets Manager:

Create a random string in AWS Secrets Manager to be used as a custom HTTP header value.

Set Up Automatic Rotation:

Implement a Lambda function to handle automatic rotation of the secret in AWS Secrets Manager, ensuring the header value remains secure.

Configure CloudFront Custom Header:

In the CloudFront distribution settings, configure an origin custom header with the name and value from AWS Secrets Manager. This header will be included in requests forwarded to the ALB.

Create AWS WAF Web ACL:

Create a Web ACL in AWS WAF with a string match rule to allow requests that include the custom header with the correct value.

Associate the Web ACL with the ALB to filter incoming traffic based on the custom header.

By using this method, you can ensure that only requests coming through CloudFront (which injects the custom header) can reach the ALB, enhancing the origin security

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asked 16/09/2024
Budi Gunawan
46 questions
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