topic Registered
Verified 2026-09-19 · registry updated
2025-10-02HTTP registry: proto
Application protocol used for incoming request
HTTP parameter values extend negotiation, framing, preferences, range handling, or other protocol components. proto is registered in HTTP Forwarded Parameters. Defining reference: rfc7239.
httpregistryhttp-parametersforwarded
Identifier (http)
proto
Application protocol used for incoming request
Interpret parameters only in the context that defines them; unknown parameters must not silently change security or framing behavior.
This registry value is currently marked active by IANA. Follow the defining specification before sending, accepting, or proxying it.
IANA registry: http-parameters/forwarded
Registry reference: rfc7239
Sources