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.
• 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.
• D.Allow Outbound on port 80 for Destination NAT Instance IP

Correct 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

Comment: *

Name: *

Email: *

Verification: *

A company is operating an open-source software platform that is internet facing. The legacy software platform no longer receives security updates. The software platform operates using Amazon route 53 weighted load balancing to send traffic to two Amazon EC2 instances that connect to an Amazon POS cluster a recent report suggests this software platform is vulnerable to SQL injection attacks. with samples of attacks provided. The company's security engineer must secure this system against SQL injection attacks within 24 hours. The secure, engineer's solution involve the least amount of effort and maintain normal operations during implementation.
What should the security engineer do to meet these requirements?

• A.Obtain me latest source code for the platform and make ire necessary updates Test me updated code to ensure that the vulnerability has been irrigated, then deploy me patched version of the platform to the EC2 instances
• B.Update the security group mat is attached to the EC2 instances, removing access from the internet to the TCP port used by the SQL database Create an IAM WAF web ACL containing rules mat protect me application from this attack, men apply it to the EC2 instances Test to ensure me vulnerability has been mitigated. then restore the security group to me onginal setting
• C.Create an Application Load Balancer with the existing EC2 instances as a target group Create an IAM WAF web ACL containing rules mat protect the application from this attach. then apply it to the ALB Test to ensure me vulnerability has been mitigated, then redirect thee Route 53 records to point to the ALB Update security groups on the EC 2 instances to prevent direct access from the internet
• D.Create an Amazon CloudFront distribution specifying one EC2 instance as an origin Create an IAM WAF web ACL containing rules that protect the application from this attack, then apply it to me distribution Test to ensure the vulnerability has mitigated, then redirect the Route 53 records to point to CloudFront

Comment: *

Name: *

Email: *

Verification: *