DNS 8 NXRRSET vs 17 BADKEY
Both DNS 8 (NXRRSET) and 17 (BADKEY) belong to the DNS Response Codes (RCODEs) category. 8 indicates that rR Set that should exist does not. A required resource record set is missing from the zone. Meanwhile, 17 means that key not recognized. The TSIG key name in the message is not configured on the server.
Descripción
RR Set that should exist does not. A required resource record set is missing from the zone.
Cuándo lo verás
A DNS UPDATE prerequisite expected a certain RRset to exist (e.g., an MX record), but the zone does not contain it.
Cómo solucionarlo
Create the missing RRset in the zone before retrying the update, or change the prerequisite to not require its existence.
Descripción
Key not recognized. The TSIG key name in the message is not configured on the server.
Cuándo lo verás
Your TSIG-signed query or update references a key name that the server does not have in its keyring, so it cannot verify the signature.
Cómo solucionarlo
Ensure the TSIG key name matches exactly (case-sensitive) on both client and server. Add the missing key to the server's configuration if it is a new key.
Diferencias clave
DNS 8: RR Set that should exist does not. A required resource record set is missing from the zone.
DNS 17: Key not recognized. The TSIG key name in the message is not configured on the server.
You encounter 8 when a DNS UPDATE prerequisite expected a certain RRset to exist (e.g., an MX record), but the zone does not contain it.
You encounter 17 when your TSIG-signed query or update references a key name that the server does not have in its keyring, so it cannot verify the signature.
Cuándo usar cada uno
For 8 (NXRRSET): Create the missing RRset in the zone before retrying the update, or change the prerequisite to not require its existence. For 17 (BADKEY): Ensure the TSIG key name matches exactly (case-sensitive) on both client and server. Add the missing key to the server's configuration if it is a new key.