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.
Mô tả
No error condition. The query completed successfully and the response contains the requested data.
Khi bạn thấy mã này
This is the normal, successful response to any DNS query — the name was resolved and the answer section contains the requested records.
Cách khắc phục
No fix needed. RCODE 0 means the DNS lookup succeeded as expected.
Mô tả
Not Implemented. The name server does not support the requested query type or operation.
Khi bạn thấy mã này
You sent a query type (e.g., IXFR, dynamic update) that the server does not support or has disabled.
Cách khắc phục
Verify the server supports the query type you are using. If you need zone transfers or dynamic updates, enable them in the server configuration.
Sự khác biệt chính
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.
Khi nào dùng cái nào
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.