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Question 387 - SCS-C01 discussion

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Your company has the following setup in AWS a. A set of EC2 Instances hosting a web application b. An application load balancer placed in front of the EC2 Instances There seems to be a set of malicious requests coming from a set of IP addresses. Which of the following can be used to protect against these requests?

Please select:

A.
Use Security Groups to block the IP addresses
Answers
A.
Use Security Groups to block the IP addresses
B.
Use VPC Flow Logs to block the IP addresses
Answers
B.
Use VPC Flow Logs to block the IP addresses
C.
Use AWS inspector to block the IP addresses
Answers
C.
Use AWS inspector to block the IP addresses
D.
Use AWS WAF to block the IP addresses
Answers
D.
Use AWS WAF to block the IP addresses
Suggested answer: D

Explanation:

Your answer is incorrect

Answer -D

The AWS Documentation mentions the following on AWS WAF which can be used to protect Application Load Balancers and Cloud front A web access control list (web ACL) gives you fine-grained control over the web requests that your Amazon CloudFront distributions or Application Load Balancers respond to. You can allow or block the following types of requests:

Originate from an IP address or a range of IP addresses

Originate from a specific country or countries

Contain a specified string or match a regular expression (regex) pattern in a particular part of requests Exceed a specified length Appear to contain malicious SQL code (known as SQL injection) Appear to contain malicious scripts (known as cross-site scripting)

Option A is invalid because by default Security Groups have the Deny policy Options B and C are invalid because these services cannot be used to block IP addresses For information on AWS WAF, please visit the below URL:

https://docs.aws.amazon.com/waf/latest/developerguide/web-acl.htmlThe correct answer is: Use AWS WAF to block the IP addressesSubmit your Feedback/Queries to our Experts

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asked 16/09/2024
Guillaume Deterville
46 questions
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