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SOA-C02 · Question #66

A company has an AWS Site-to-Site VPN connection between on-premises resources and resources that are hosted in a VPC. A SysOps administrator launches an Amazon EC2 instance that has only a private…

The correct answer is C. Create VPC flow logs for the EC2 instance's elastic network interface to check for rejected traffic. https://docs.aws.amazon.com/vpc/latest/userguide/flow-logs.html

Submitted by naveen.iyer· Mar 30, 2026Monitoring, Logging, and Remediation

Question

A company has an AWS Site-to-Site VPN connection between on-premises resources and resources that are hosted in a VPC. A SysOps administrator launches an Amazon EC2 instance that has only a private IP address into a private subnet in the VPC. The EC2 instance runs Microsoft Windows Server. A security group for the EC2 instance has rules that allow inbound traffic from the on-premises network over the VPN connection. The on-premises environment contains a third-party network firewall. Rules in the third-party network firewall allow Remote Desktop Protocol (RDP) traffic to flow between the on-premises users over the VPN connection. The on-premises users are unable to connect to the EC2 instance and receive a timeout error. What should the SysOps administrator do to troubleshoot this issue?

Options

  • ACreate Amazon CloudWatch logs for the EC2 instance to check for blocked traffic.
  • BCreate Amazon CloudWatch logs for the Site-to-Site VPN connection to check for blocked traffic.
  • CCreate VPC flow logs for the EC2 instance's elastic network interface to check for rejected traffic.
  • DInstruct users to use EC2 Instance Connect as a connection method.

How the community answered

(37 responses)
  • A
    3% (1)
  • B
    3% (1)
  • C
    84% (31)
  • D
    11% (4)

Explanation

https://docs.aws.amazon.com/vpc/latest/userguide/flow-logs.html

Topics

#VPC flow logs#Site-to-Site VPN#RDP troubleshooting#network connectivity

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