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Zorluk: OrtaMulti-Account and Hybrid DNS Architecture Strategy

An automotive manufacturer is establishing a multi-account AWS landing zone. A central Shared Services account hosts a Route 53 Private Hosted Zone (PHZ) for `factory.internal` associated with the Shared Services VPC. Workloads in a Production VPC in a separate Production account need to resolve domains in `factory.internal`. Additionally, on-premises assembly line systems, connected via AWS Direct Connect and AWS Transit Gateway, must resolve domains in `factory.internal`. Which combination of actions will allow both the Production VPC workloads and the on-premises systems to resolve domains in `factory.internal`?

  1. In the Shared Services account, authorize the association of the `factory.internal` Private Hosted Zone with the Production VPC. In the Production account, associate the Production VPC with the `factory.internal` Private Hosted Zone. Create a Route 53 Resolver Inbound Endpoint in the Shared Services VPC, and configure the on-premises DNS servers to forward queries for `factory.internal` to the Inbound Endpoint IP addresses.Cevap
  2. B
    Share the `factory.internal` Private Hosted Zone with the Production account and the on-premises network using AWS Resource Access Manager (RAM). In the Production VPC, accept the resource share. Create a Route 53 Resolver Inbound Endpoint in the Shared Services VPC, and configure the on-premises DNS servers to forward queries for `factory.internal` to the Inbound Endpoint IP addresses.
  3. C
    Rely on the AWS Transit Gateway connection between the Shared Services VPC and the Production VPC to route DNS traffic. Configure the Production VPC's DHCP options set to point to the Route 53 Resolver Inbound Endpoint in the Shared Services VPC. Forward the on-premises DNS queries for `factory.internal` directly to a Route 53 Resolver Outbound Endpoint in the Shared Services VPC.
  4. D
    In the Shared Services account, associate the `factory.internal` Private Hosted Zone with the Production VPC using the Route 53 console. Create a Route 53 Resolver Outbound Endpoint in the Shared Services VPC, and configure the on-premises DNS servers to route DNS traffic for `factory.internal` over an AWS Direct Connect public virtual interface directly to the Route 53 link-local DNS IP address (169.254.169.253169.254.169.253).

Cevap

In the Shared Services account, authorize the association of the `factory.internal` Private Hosted Zone with the Production VPC. In the Production account, associate the Production VPC with the `factory.internal` Private Hosted Zone. Create a Route 53 Resolver Inbound Endpoint in the Shared Services VPC, and configure the on-premises DNS servers to forward queries for `factory.internal` to the Inbound Endpoint IP addresses.
The correct answer outlines the proper steps for cross-account Private Hosted Zone (PHZ) association and hybrid inbound resolution. Because Route 53 PHZs are account-bound, associating a VPC in another account requires an authorization step from the owner account before the association can be executed in the consumer account. To resolve these DNS records from on-premises, a Route 53 Resolver Inbound Endpoint must be created in a VPC associated with the PHZ. On-premises DNS servers are then configured to forward requests to the Inbound Endpoint's IP addresses.

Adım Adım Çözüm

1
Authorize cross-account association of the Private Hosted Zone.
The Shared Services account runs `create-vpc-association-authorization` targeting the Production VPC ID.
Before a member VPC can associate with a PHZ owned by another account, the owner account must explicitly authorize the relationship.
2
Associate the Private Hosted Zone with the consumer VPC.
The Production account runs `associate-vpc-with-hosted-zone` using the authorized PHZ ID.
The association completes the connection, allowing resources in the Production VPC to resolve names defined in `factory.internal`.
3
Deploy an Inbound Resolver Endpoint in the Shared Services VPC.
IP addresses are assigned to the Inbound Endpoint within the Shared Services VPC subnets.
This endpoint receives external DNS queries from the on-premises environment over Direct Connect or VPN.
4
Configure on-premises forwarders.
On-premises DNS servers forward queries for `factory.internal` to the Inbound Resolver Endpoint IP addresses.
This routes the query into AWS Route 53 Resolver, which resolves it using the PHZ associated with the Shared Services VPC.

Anahtar Kavram

Cross-account Private Hosted Zone association requires explicit CLI/API authorization followed by association, while hybrid inbound DNS resolution relies on Route 53 Resolver Inbound Endpoints.
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