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Your current setup in AWS consists of the following architecture. 2 public subnets, one subnet which has the web servers accessed by users across the internet and the other subnet for the database server. Which of the following changes to the architecture would add a better security boundary to the resources hosted in your setup Please select:

Question 377 - SCS-C01 discussion

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A user has created a VPC with the public and private subnets using the VPC wizard. The VPC has CIDR 20.0.0.0/16. The public subnet uses CIDR 20.0.1.0/24. The user is planning to host a web server in the public subnet with port 80 and a Database server in the private subnet with port 3306. The user is configuring a security group for the public subnet (WebSecGrp) and the private subnet (DBSecGrp). which of the below mentioned entries is required in the private subnet database security group DBSecGrp?

Please select:

A.
Allow Inbound on port 3306 for Source Web Server Security Group WebSecGrp.
Answers
A.
Allow Inbound on port 3306 for Source Web Server Security Group WebSecGrp.
B.
Allow Inbound on port 3306 from source 20.0.0.0/16
Answers
B.
Allow Inbound on port 3306 from source 20.0.0.0/16
C.
Allow Outbound on port 3306 for Destination Web Server Security Group WebSecGrp.
Answers
C.
Allow Outbound on port 3306 for Destination Web Server Security Group WebSecGrp.
D.
Allow Outbound on port 80 for Destination NAT Instance IP
Answers
D.
Allow Outbound on port 80 for Destination NAT Instance IP
Suggested answer: A

Explanation:

Since the Web server needs to talk to the database server on port 3306 that means that the database server should allow incoming traffic on port 3306. The below table from the aws documentation shows how the security groups should be set up.

Option B is invalid because you need to allow incoming access for the database server from the WebSecGrp security group. Options C and D are invalid because you need to allow Outbound traffic and not inbound traffic For more information on security groups please visit the below Link: http://docs.aws.amazon.com/AmazonVPC/latest/UserGuide/VPC Scenario2.html The correct answer is: Allow Inbound on port 3306 for Source Web Server Security Group WebSecGrp. Submit your Feedback/Queries to our Experts

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asked 16/09/2024
Djordje Novakovic
36 questions
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