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Cloud Computing · Advanced

Route 53 Resolver

DNS resolver built into every VPC, with inbound and outbound endpoints for hybrid DNS resolution and DNS Firewall.

Definition

Route 53 Resolver answers DNS queries from VPC resources. Inbound endpoints let on-premises resolvers query private hosted zones; outbound endpoints with forwarding rules send queries for on-premises domains to corporate DNS servers. Resolver DNS Firewall blocks queries to malicious domains.

Example

Outbound resolver rules forward corp.example.com queries to on-premises DNS servers over Direct Connect.

Exam tip

Hybrid DNS questions: on-prem resolving AWS names uses inbound endpoints; AWS resolving on-prem names uses outbound endpoints.

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