DNS 0 NOERROR vs 8 NXRRSET
Both DNS 0 (NOERROR) and 8 (NXRRSET) belong to the DNS Response Codes (RCODEs) category. 0 indicates that no error condition. The query completed successfully and the response contains the requested data. Meanwhile, 8 means that rR Set that should exist does not. A required resource record set is missing from the zone.
Descrição
No error condition. The query completed successfully and the response contains the requested data.
Quando você o vê
This is the normal, successful response to any DNS query — the name was resolved and the answer section contains the requested records.
Como corrigir
No fix needed. RCODE 0 means the DNS lookup succeeded as expected.
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.
Diferenças principais
DNS 0: No error condition. The query completed successfully and the response contains the requested data.
DNS 8: RR Set that should exist does not. A required resource record set is missing from the zone.
You encounter 0 when this is the normal, successful response to any DNS query — the name was resolved and the answer section contains the requested records.
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.
Quando usar qual
For 0 (NOERROR): No fix needed. RCODE 0 means the DNS lookup succeeded as expected. For 8 (NXRRSET): Create the missing RRset in the zone before retrying the update, or change the prerequisite to not require its existence.