Which solution meets this requirement?
Configure a gateway endpoint for Amazon ECS. Modify the route table to include an entry pointing to the ECS cluster.
Create a Network Load Balancer and AWS PrivateLink endpoint for Amazon ECS in the same VPC that is hosting the ECS cluster.
Create a Network Load Balancer in one VPC and an AWS PrivateLink endpoint for Amazon ECS in another VPC. Connect the two VPCs by using VPC peering.
Configure an Amazon Route 53 record with Amazon ECS as the target. Apply a server certificate to Route 53 from AWS Certificate Manager (ACM) for SSL offloading.
Explanations:
A gateway endpoint is used for services like Amazon S3 and DynamoDB, not for Amazon ECS. Amazon ECS does not support gateway endpoints, so this option does not fulfill the requirement of keeping traffic within the company’s private IP space.
Creating a Network Load Balancer (NLB) and using AWS PrivateLink allows secure communication between on-premises and the ECS cluster without exposing traffic to the public internet. The NLB can be configured to operate within the private IP space, ensuring compliance with the security mandate.
While a Network Load Balancer and AWS PrivateLink can work together, creating them in separate VPCs with VPC peering adds unnecessary complexity. The primary requirement is to ensure traffic remains within private IP space, which can be achieved within a single VPC using option B.
Amazon Route 53 is a DNS service, and while it can direct traffic, it does not directly facilitate private IP communication between on-premises and ECS. Additionally, SSL offloading is not related to maintaining traffic within a private IP space as mandated by the security requirements.
I scheme that the answer is:
Create a Network Load Balancer and AWS PrivateLink endpoint for Amazon ECS in the same VPC that is hosting the ECS cluster.