DNS 4 NOTIMP vs 9 NOTAUTH
Both DNS 4 (NOTIMP) and 9 (NOTAUTH) belong to the DNS Response Codes (RCODEs) category. 4 indicates that not Implemented. The name server does not support the requested query type or operation. Meanwhile, 9 means that server Not Authoritative for zone, or Not Authorized. The server is not authoritative for the zone named in the Zone section.
설명
Not Implemented. The name server does not support the requested query type or operation.
이 코드를 보게 되는 경우
You sent a query type (e.g., IXFR, dynamic update) that the server does not support or has disabled.
해결 방법
Verify the server supports the query type you are using. If you need zone transfers or dynamic updates, enable them in the server configuration.
설명
Server Not Authoritative for zone, or Not Authorized. The server is not authoritative for the zone named in the Zone section.
이 코드를 보게 되는 경우
You sent a dynamic update or zone operation to a server that is not the authoritative master for that zone, or the server rejected it due to TSIG authentication failure.
해결 방법
Send the update to the correct primary authoritative server for the zone. If using TSIG, verify the key name and secret match on both client and server.
주요 차이점
DNS 4: Not Implemented. The name server does not support the requested query type or operation.
DNS 9: Server Not Authoritative for zone, or Not Authorized. The server is not authoritative for the zone named in the Zone section.
You encounter 4 when you sent a query type (e.g., IXFR, dynamic update) that the server does not support or has disabled.
You encounter 9 when you sent a dynamic update or zone operation to a server that is not the authoritative master for that zone, or the server rejected it due to TSIG authentication failure.
언제 어떤 것을 사용할지
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. For 9 (NOTAUTH): Send the update to the correct primary authoritative server for the zone. If using TSIG, verify the key name and secret match on both client and server.