16
DNS
16 BADVERS/BADSIG
Bad OPT Version or TSIG Signature Failure. Either the EDNS version in the OPT record is not supported, or the TSIG signature on the message failed verification.
Cuándo verás este código
As BADVERS: your client sent an EDNS version higher than the server supports. As BADSIG: the TSIG MAC on the message did not match, indicating a shared-secret mismatch or message tampering.
Cómo solucionarlo
For BADVERS, downgrade the EDNS version (most servers support version 0 only). For BADSIG, regenerate and re-synchronize the TSIG shared secret on both endpoints.
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RFC 9114: HTTP/3 Protocol Deep Dive
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RFC 3261: SIP Protocol Deep Dive
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QUIC Protocol: The Transport Layer Behind HTTP/3
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Migrating from TLS 1.2 to TLS 1.3: Configuration and Compatibility
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