Internal DNS as Control Plane: Why Resolvers Matter More Than They Seem
Cloudflare has announced the general availability of Cloudflare Internal DNS for corporate clients of Cloudflare Gateway. The service combines public and internal DNS with a protective resolver, structured around three core objects: internal zones, views, and resolver policies. The article explains how typical hybrid infrastructures suffer from fragmented DNS layers that lead to resolution failures often misdiagnosed as balancer or VPN issues. It emphasizes that DNS serves as an early control point in zero-trust environments because it decides whether a service exists and which address is returned before any connection is established. The model separates data plane from management plane, requiring unified change channels, auditing, and observability to remain effective. Practical recommendations include avoiding manual edits across servers, using infrastructure-as-code for consistency, and integrating with systems such as NetBox for desired-state management.
HabrSep 2, 2026Translated from Russian