Advantages of using the HTTPDNS domain name resolution service

Anti-hijacking: Prevents man-in-the-middle (MITM) attacks using the HTTP protocol for point-to-point communication. Signed resolutions prevent tampering, and a Service-Level Agreement (SLA) guarantees cache management. Connections bypass the local DNS for direct access.

Accurate scheduling: Obtains the user or gateway IP address through a direct connection to the gateway. Extension Mechanisms for DNS (EDNS) parsing returns a list of the best available IP addresses.

Low latency: Reduces resolution latency for multiple requests using pre-resolution, cache policies, and batch resolution. This service also eliminates DNS resolution forwarding.

High connection success rate: Increases the success rate of application connections using the HTTP protocol to select the best IP address based on the carrier and zone. It also performs health checks to remove unavailable IP addresses.

Real-time updates: Domain name changes take effect in real time because the service strictly follows Time to Live (TTL) standards. The service integrates with Alibaba Cloud's authoritative DNS and actively pushes updates to HTTPDNS when changes occur.

SDNS provides granular control over the resolution flow.