topic Provisional
Verified 2026-09-19 · registry updated 2026-08-28

HTTP registry: 0x08

DATA

MASQUE values support proxying datagrams or traffic through HTTP/3 and extended CONNECT. The registry marks this value provisional; review compatibility before deploying it. 0x08 is provisional in HTTP Capsule Types. Defining reference: draft-ietf-httpbis-connect-tcp-12.

httpregistrymasquehttp-capsule-types

Identifier (http)

0x08

DATA

Apply strict authorization and destination policy so tunnels cannot reach arbitrary internal networks or ports. The registry marks this value provisional; review compatibility before deploying it.

This registry value is currently marked provisional by IANA. Follow the defining specification before sending, accepting, or proxying it.

IANA registry: masque/http-capsule-types

Registry reference: draft-ietf-httpbis-connect-tcp-12

Sources

Permalink: https://merginit.com/reference/http/registry/masque/http-capsule-types/0x08-311