DNS 0 NOERROR vs 1 FORMERR
Both DNS 0 (NOERROR) and 1 (FORMERR) 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, 1 means that format error. The name server was unable to interpret the query due to a malformed DNS message.
الوصف
No error condition. The query completed successfully and the response contains the requested data.
متى تراه
This is the normal, successful response to any DNS query — the name was resolved and the answer section contains the requested records.
كيفية الإصلاح
No fix needed. RCODE 0 means the DNS lookup succeeded as expected.
الوصف
Format error. The name server was unable to interpret the query due to a malformed DNS message.
متى تراه
Your DNS client or library sent a query the server could not parse, often caused by a buggy resolver, corrupted packet, or unsupported EDNS options.
كيفية الإصلاح
Check your DNS client or library version for known bugs. Capture the raw query with dig or Wireshark and verify it conforms to the DNS wire format.
الفروق الرئيسية
DNS 0: No error condition. The query completed successfully and the response contains the requested data.
DNS 1: Format error. The name server was unable to interpret the query due to a malformed DNS message.
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 1 when your DNS client or library sent a query the server could not parse, often caused by a buggy resolver, corrupted packet, or unsupported EDNS options.
متى تستخدم أيًا منهما
For 0 (NOERROR): No fix needed. RCODE 0 means the DNS lookup succeeded as expected. For 1 (FORMERR): Check your DNS client or library version for known bugs. Capture the raw query with dig or Wireshark and verify it conforms to the DNS wire format.