428
SIP
428 Use Identity Header
The server requires an Identity header to verify the caller's identity but it was not included in the request.
Cuándo verás este código
In environments that enforce SIP Identity (RFC 4474) for caller authentication and spam prevention (STIR/SHAKEN).
Cómo solucionarlo
Add a valid Identity header signed by an authentication service. Ensure your STIR/SHAKEN infrastructure is properly configured.
Especificación
Comparar con
Guías
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Real-Time Protocols
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Protocol Deep Dives
TLS 1.3: Faster, Simpler, More Secure
Protocol Deep Dives
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Status Code
Request Method (HTTP Verb)
TLS Handshake
Authentication
TCP/IP
Port Number
NAT (Network Address Translation)
Socket
Request-Response Model
RFC (Request for Comments)
Connection-Oriented
Full-Duplex
SRV Record
SIP Dialog
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SIP User Agent
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SRTP (Secure Real-time Transport Protocol)
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SIP SUBSCRIBE/NOTIFY
B2BUA (Back-to-Back User Agent)
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Codec Negotiation
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VoIP (Voice over IP)
Presence (SIP)
PBX (Private Branch Exchange)
MFA (Multi-Factor Authentication)
TLS Versions