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

HTTP registry: 0x243f

FULL_NONCE_COUNTER

MASQUE values support proxying datagrams or traffic through HTTP/3 and extended CONNECT. 0x243f is permanent in HTTP Capsule Types. Defining reference: https://portal.3gpp.org/desktopmodules/Specifications/SpecificationDetails.aspx?specificationId=3390.

httpregistrymasquehttp-capsule-types

Identifier (http)

0x243f

FULL_NONCE_COUNTER

Apply strict authorization and destination policy so tunnels cannot reach arbitrary internal networks or ports.

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

IANA registry: masque/http-capsule-types

Registry reference: https://portal.3gpp.org/desktopmodules/Specifications/SpecificationDetails.aspx?specificationId=3390

Sources

Permalink: https://merginit.com/reference/http/registry/masque/http-capsule-types/0x243f-316