Speeding up HTTPS and HTTP/3 negotiation with... DNS
Sep 30, 2020Alessandro Ghedini
Summary
This post details Cloudflare's rollout of support for the SVCB/HTTPS DNS record type. It explains how this record type allows clients to discover support for HTTP/3 and HTTP/2 directly from DNS, enabling faster secure connection negotiation and skipping initial unencrypted HTTP requests. It also covers the 'alias form' of SVCB/HTTPS records, which provides CNAME-like functionality for apex domains. Cloudflare automatically generates these records for customers enabling HTTP/3.
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