DNS 0 NOERROR vs 20 BADNAME
Both DNS 0 (NOERROR) and 20 (BADNAME) 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, 20 means that duplicate key name. The key name in a TKEY negotiation is already in use or conflicts with an existing key.
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
Duplicate key name. The key name in a TKEY negotiation is already in use or conflicts with an existing key.
متى تراه
A TKEY key establishment failed because a key with the same name already exists on the server from a previous session that was not properly cleaned up.
كيفية الإصلاح
Use a unique key name for each TKEY session (e.g., append a timestamp or random suffix). Delete stale keys on the server if they are no longer needed.
الفروق الرئيسية
DNS 0: No error condition. The query completed successfully and the response contains the requested data.
DNS 20: Duplicate key name. The key name in a TKEY negotiation is already in use or conflicts with an existing key.
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 20 when a TKEY key establishment failed because a key with the same name already exists on the server from a previous session that was not properly cleaned up.
متى تستخدم أيًا منهما
For 0 (NOERROR): No fix needed. RCODE 0 means the DNS lookup succeeded as expected. For 20 (BADNAME): Use a unique key name for each TKEY session (e.g., append a timestamp or random suffix). Delete stale keys on the server if they are no longer needed.