DNS 0 NOERROR vs 4 NOTIMP
Both DNS 0 (NOERROR) and 4 (NOTIMP) 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, 4 means that not Implemented. The name server does not support the requested query type or operation.
Описание
No error condition. The query completed successfully and the response contains the requested data.
Когда вы это видите
This is the normal, successful response to any DNS query — the name was resolved and the answer section contains the requested records.
Как исправить
No fix needed. RCODE 0 means the DNS lookup succeeded as expected.
Описание
Not Implemented. The name server does not support the requested query type or operation.
Когда вы это видите
You sent a query type (e.g., IXFR, dynamic update) that the server does not support or has disabled.
Как исправить
Verify the server supports the query type you are using. If you need zone transfers or dynamic updates, enable them in the server configuration.
Ключевые различия
DNS 0: No error condition. The query completed successfully and the response contains the requested data.
DNS 4: Not Implemented. The name server does not support the requested query type or operation.
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 4 when you sent a query type (e.g., IXFR, dynamic update) that the server does not support or has disabled.
Когда что использовать
For 0 (NOERROR): No fix needed. RCODE 0 means the DNS lookup succeeded as expected. For 4 (NOTIMP): Verify the server supports the query type you are using. If you need zone transfers or dynamic updates, enable them in the server configuration.