DNS 0 NOERROR vs 5 REFUSED
Both DNS 0 (NOERROR) and 5 (REFUSED) 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, 5 means that query refused. The name server refuses to perform the requested operation for policy reasons.
คำอธิบาย
No error condition. The query completed successfully and the response contains the requested data.
เมื่อคุณพบเห็น
This is the normal, successful response to any DNS query — the name was resolved and the answer section contains the requested records.
วิธีแก้ไข
No fix needed. RCODE 0 means the DNS lookup succeeded as expected.
คำอธิบาย
Query refused. The name server refuses to perform the requested operation for policy reasons.
เมื่อคุณพบเห็น
The server rejected your query due to access control — for example, a recursive resolver that only serves its own network, or a zone transfer blocked by ACL.
วิธีแก้ไข
Check the server's allow-query, allow-recursion, or allow-transfer ACLs. If you are not authorized to use this resolver, switch to a public DNS service.
ความแตกต่างหลัก
DNS 0: No error condition. The query completed successfully and the response contains the requested data.
DNS 5: Query refused. The name server refuses to perform the requested operation for policy reasons.
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 5 when the server rejected your query due to access control — for example, a recursive resolver that only serves its own network, or a zone transfer blocked by ACL.
ควรใช้อันไหนเมื่อไร
For 0 (NOERROR): No fix needed. RCODE 0 means the DNS lookup succeeded as expected. For 5 (REFUSED): Check the server's allow-query, allow-recursion, or allow-transfer ACLs. If you are not authorized to use this resolver, switch to a public DNS service.