DNS 8 NXRRSET vs 19 BADMODE
Both DNS 8 (NXRRSET) and 19 (BADMODE) 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, 19 means that bad TKEY Mode. The TKEY mode field contains a value not supported by the server.
Descrição
RR Set that should exist does not. A required resource record set is missing from the zone.
Quando você o vê
A DNS UPDATE prerequisite expected a certain RRset to exist (e.g., an MX record), but the zone does not contain it.
Como corrigir
Create the missing RRset in the zone before retrying the update, or change the prerequisite to not require its existence.
Descrição
Bad TKEY Mode. The TKEY mode field contains a value not supported by the server.
Quando você o vê
Your client attempted a TKEY key exchange using a mode (e.g., Diffie-Hellman, GSS-API) that the server does not support or has not been configured for.
Como corrigir
Check which TKEY modes the server supports and configure your client to use a compatible mode. GSS-TSIG (mode 3) is the most widely deployed.
Diferenças principais
DNS 8: RR Set that should exist does not. A required resource record set is missing from the zone.
DNS 19: Bad TKEY Mode. The TKEY mode field contains a value not supported by 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 19 when your client attempted a TKEY key exchange using a mode (e.g., Diffie-Hellman, GSS-API) that the server does not support or has not been configured for.
Quando usar qual
For 8 (NXRRSET): Create the missing RRset in the zone before retrying the update, or change the prerequisite to not require its existence. For 19 (BADMODE): Check which TKEY modes the server supports and configure your client to use a compatible mode. GSS-TSIG (mode 3) is the most widely deployed.