Learn to configure AWS VPC DHCP, Resolver Service and forwarding rules to send DNS queries through an on-prem DNS security solution.
Table of Contents
Question
A company is establishing connectivity between its on-premises site and an existing VPC on AWS to meet a new security requirement. According to the new requirement, all public DNS queries must use an on-premises DNS security solution. The company’s security team has allowed an exception for the AWS service endpoints because the company is using VPC endpoints to access AWS services.
Which combination of steps should a network engineer take to configure the architecture to meet these requirements? (Choose three.)
A. Create a system rule for the domain name “.” (dot) with a target IP address of the on-premises DNS security solution.
B. Create a new DHCP options set that provides the IP address of the on-premises DNS security solution. Update the VPC to use this new DHCP options set.
C. Create an Amazon Route 53 Resolver inbound endpoint. Associate this endpoint with the VPC.
D. Create an Amazon Route 53 Resolver outbound endpoint. Associate this endpoint with the VPC.
E. Create a system rule for the domain name amazonaws.com.
F. Create a forwarding rule for the domain name “.” (dot) with a target IP address of the on-premises DNS security solution.
Answer
B. Create a new DHCP options set that provides the IP address of the on-premises DNS security solution. Update the VPC to use this new DHCP options set.
D. Create an Amazon Route 53 Resolver outbound endpoint. Associate this endpoint with the VPC.
F. Create a forwarding rule for the domain name “.” (dot) with a target IP address of the on-premises DNS security solution.
Explanation
Together this configures the VPC to send all public DNS queries through the on-prem DNS security solution using the Resolver outbound endpoint and forwarding rules. The DHCP options set ensures EC2 instances in the VPC use the on-prem server.
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