HTTPS DNS record
A DNS record type that tells a client, before it connects, which protocols a site speaks (its alpn list, such as h2 and h3) and the keys for Encrypted Client Hello. CrawlCheck queries it for a scanned host and records whether it exists, whether it lists h3 and whether it carries ECH.
What HTTPS DNS record does not show
It describes what the site offers; it does not show the server behind it answers correctly.
Terms this definition uses
Encrypted Client Hello · Offer
Related terms in HTTP, edge and rendering
The delivery layer between an origin and a client: proxies, caches, redirects, status codes and the headers that decide what a crawler actually received.
Content-Language header · HTTP/3 · Alt-Svc · Link header · content negotiation · Markdown negotiation · Retry-After · Server-Timing · WWW-Authenticate · Allow header · Content-Digest · Origin server · Reverse proxy · CDN · Edge node · WAF · Bot score · TLS handshake · DNS resolution · DNS timeout · Connection timeout · Read timeout · Redirect chain · Redirect loop · 301 redirect · 302 redirect · 307 redirect · 308 redirect · 304 response · 404 response · 410 response · 429 response · 500 response · 502 response · 503 response · 504 response · HEAD request · GET request · Content type · MIME sniffing · Content encoding · Compression · Brotli · ETag · Last-Modified · If-None-Match · Cache hit · Cache miss · Cache key · Vary header · Stale response · Stale-while-revalidate · Edge redirect · Origin bypass · Response parity · Header parity · hreflang · canonical URL · HSTS · HSTS preload list · Content-Security-Policy · CSP nonce · edge cache · cache split · cache-buster · Cache-Control · Age header · render-blocking resource · payload text share · lazy loading · 404 and 410 status codes
Questions about HTTPS DNS record
What is HTTPS DNS record?
A DNS record type that tells a client, before it connects, which protocols a site speaks (its alpn list, such as h2 and h3) and the keys for Encrypted Client Hello. CrawlCheck queries it for a scanned host and records whether it exists, whether it lists h3 and whether it carries ECH.
What does HTTPS DNS record not show or guarantee?
It describes what the site offers; it does not show the server behind it answers correctly.
Which area of the glossary does HTTPS DNS record belong to?
HTTP, edge and rendering: The delivery layer between an origin and a client: proxies, caches, redirects, status codes and the headers that decide what a crawler actually received.
← Alt-Svc · Link header →
See it in the full glossary · 772 terms across 19 areas.
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