missing_extension — errors.fyi

tls · tls/missing_extension

missing_extension

A TLS 1.3 endpoint received a handshake message that did not contain an extension required for the negotiated protocol version or parameters. This alert is always fatal.

References

rfc-editor.org/rfc/rfc8446

In this namespace

← previous internal_error internal_error next → no_application_protocol no_application_protocol

handshake_failure illegal_parameter inappropriate_fallback insufficient_security internal_error missing_extension no_application_protocol no_certificate_RESERVED no_renegotiation_RESERVED protocol_version record_overflow