Overview
CDB Managed DNS is an authoritative DNS service for domain delegation. Domain records are managed through the CDB Technical Web Portal, REST API, or Terraform, and queries are served through CDB's global AnycastDNS network, routing end users to the nearest edge location automatically.
Dynamic response delivers different records to different clients based on geolocation, ASN, subnet, or weight, including EDNS Client Subnet support for routing accuracy.
Healthchecks monitor server availability and remove failing IPs from DNS responses, redirecting traffic to working endpoints automatically.
DNSSEC validates DNS responses with digital signatures, protecting against cache poisoning and DNS spoofing.
CDN integration resolves A and AAAA records to CDN addresses directly, eliminating the CNAME lookup step.
CNAME flattening enables CNAME-like behavior at the zone apex where standard CNAME records are not permitted. HTTPS records carry connection parameters for HTTPS services in DNS responses, and IPv6 is supported via AAAA records.
OctoDNS, Certbot, and Terraform integrations cover GitOps-style zone management, certificate automation, and infrastructure-as-code workflows.
DNS records are managed in two modes. Non-advanced mode is for standard DNS entries — one value per record, no traffic routing. Advanced mode supports RRsets with multiple values and enables dynamic response, Healthchecks, and geo-routing rules.
Public DNS
Public DNS provides free recursive DNS resolvers as an alternative to provider-supplied resolvers, improving resolution speed and protecting against DNS substitution attacks.
Plans
Comprehensive plan information is available on the pricing page. Key differences between plans:
| Feature | Free | Pro | Enterprise |
|---|---|---|---|
| Minimum TTL | 120 s | 30 s | 1 s |
| Dynamic RRsets per zone | 1 | Unlimited | Unlimited |
| Dynamic RRset size | 3 records | 9 records | Unlimited |
| Healthcheck records | 1 | 5 | Unlimited |
| Healthcheck frequency | 300 s | 60 s | 10 s |
| Free trial | — | 14 days | Individual terms |
All features not listed in the table are available equally across all plans.