A company's VPC has Amazon EC2 instances that are communicating with AWS services over the public internet. The company needs to change the connectivity so that the communication does not occur over…

PrivateLink endpoints automatically create ENIs in selected subnets, and the VPC route tables are updated implicitly for internal VPC routing to these ENIs. Adding a manual route with the PrivateLink endpoint as a *destination* is not how PrivateLink functions and would likely break connectivity.

For PrivateLink endpoints to be used automatically for AWS service communication, `enableDnsSupport` must be set to `True` on the VPC to allow DNS resolution of AWS service endpoints to resolve to the private IPs of the VPC endpoint ENIs. Each VPC endpoint also needs an appropriate security group configured to allow inbound traffic from the EC2 instances.

The VPC endpoint policy must explicitly allow the necessary permissions for the EC2 instances (or the IAM role/user making the request) to access the target AWS service through the endpoint. If the policy denies access, communication will fail.

Creating a public hosted zone for AWS services would direct traffic over the public internet, which is the opposite of the requirement to use PrivateLink for private connectivity.

Creating a private hosted zone *can* be used to create custom DNS names for VPC endpoints, but the problem description indicates *all* communication failing, which points to more fundamental DNS support and endpoint policy issues rather than just custom naming.