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.
Описание
RR Set that should exist does not. A required resource record set is missing from the zone.
Когда вы это видите
A DNS UPDATE prerequisite expected a certain RRset to exist (e.g., an MX record), but the zone does not contain it.
Как исправить
Create the missing RRset in the zone before retrying the update, or change the prerequisite to not require its existence.
Описание
Bad TKEY Mode. The TKEY mode field contains a value not supported by the server.
Когда вы это видите
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.
Как исправить
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.
Ключевые различия
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.
Когда что использовать
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.