Exam AWS Certified Security - Specialty All Questions

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Exam AWS Certified Security - Specialty topic 1 question 6 discussion

Exam question from Amazon's AWS Certified Security - Specialty

Question #: 6
Topic #: 1

[All AWS Certified Security - Specialty Questions]

An application is currently secured using network access control lists and security groups. Web servers are located in public subnets behind an Application Load
Balancer (ALB); application servers are located in private subnets.
How can edge security be enhanced to safeguard the Amazon EC2 instances against attack? (Choose two.)

A. Configure the application's EC2 instances to use NAT gateways for all inbound traffic.
B. Move the web servers to private subnets without public IP addresses.
C. Configure AWS WAF to provide DDoS attack protection for the ALB.
D. Require all inbound network traffic to route through a bastion host in the private subnet.
E. Require all inbound and outbound network traffic to route through an AWS Direct Connect connection.

Show Suggested Answer

Suggested Answer: BC 🗳️

by BillyC at Aug. 25, 2019, 5:13 p.m.

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josellama2000

Highly Voted 3 years, 11 months ago

Agreed. Correct is B and C A is incorrect. Nat gateways is for outbound only trafffc D is incorrect. Bastion host is mostly for incoming SSH/FTP connections and it must be placed on a public subnet E is incorrect. AWS Direct connect is used to connect your on-premisse datacenter to AWS

upvoted 52 times

nasreenazad57

3 years, 10 months ago

if we move web servers to private subnets without public IP, it mean they won't be able to serve as public web servers, am I correct?

upvoted 1 times

frees

3 years, 9 months ago

Load Balancer will have public IP.

upvoted 3 times

rohanat

2 years, 7 months ago

But application and Web Servers need to be isolated into different layers, Moving the web servers to private subnet will increase the blast radius if web servers are hacked. So this answer is not fully right

upvoted 2 times

Robert0

2 years, 2 months ago

The question does not specify that the private subnet have to be unique. Agree with you that it may be more complete answer. But they are "more secure" options than the initial state.

upvoted 1 times

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BillyC

Highly Voted 3 years, 11 months ago

B and C

upvoted 20 times

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huaze_lei

Most Recent 3 months ago

Selected Answer: BC

Load balancer will host the public IP, and then shift all the web server to private subnet. As for the ALB, it can help with the level 7 DDOS protection.

upvoted 1 times

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CarlosC

11 months, 2 weeks ago

Selected Answer: BC

Its B&C

upvoted 1 times

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jlggross

1 year, 1 month ago

C might be correct but is a tricky one. When it comes to DDoS mitigation, the recommended solution is AWS Shield, but other services can also mitigate DDoS, such as AWS WAF.

upvoted 1 times

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rapatajones

1 year, 10 months ago

Selected Answer: BC

B and C

upvoted 1 times

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Benah

1 year, 11 months ago

B and C is correct

upvoted 1 times

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Robert0

2 years, 2 months ago

Selected Answer: BC

B and C.

upvoted 1 times

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gg12345

2 years, 9 months ago

Selected Answer: BC

B and C

upvoted 1 times

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dcasabona

3 years ago

Selected Answer: BC

B and C make sense to me.

upvoted 1 times

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hk436

3 years, 9 months ago

B and C is my answer

upvoted 1 times

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Kdosec

3 years, 9 months ago

B & C are correct, but the C answer with "C. Configure AWS WAF to provide DDoS attack protection" is really not correct with DDoS attack protection, it must be AWS Shield.

upvoted 5 times

NivNZ

3 years, 9 months ago

No actually, C is correct too. If you check WAF's FAQ - "Can I use Rate-based rule to mitigate Web layer DDoS attacks?" It does say "Yes. This new rules type is designed to protect you from use cases such web-layer DDoS attacks, brute force login attempts and bad bots." Reference: https://aws.amazon.com/waf/faqs/

upvoted 8 times

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