HTTP registry: tls_protocol_error
The intermediary encountered a TLS error when communicating with the next hop, either during the handshake or afterwards.
Proxy and gateway values describe processing across trust boundaries where fields, authority, and framing may be transformed. tls_protocol_error is registered in HTTP Proxy Error Types. Defining reference: rfc9209.
Identifier (http)
tls_protocol_error
The intermediary encountered a TLS error when communicating with the next hop, either during the handshake or afterwards.
Strip hop-by-hop data, normalize framing, trust forwarded metadata only from configured proxies, and avoid exposing topology or credentials.
This registry value is currently marked active by IANA. Follow the defining specification before sending, accepting, or proxying it.
IANA registry: http-proxy-status/http-proxy-error-types
Registry reference: rfc9209
Sources