DNS 0 NOERROR vs 19 BADMODE
Both DNS 0 (NOERROR) and 19 (BADMODE) 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, 19 means that bad TKEY Mode. The TKEY mode field contains a value not supported by the server.
描述
No error condition. The query completed successfully and the response contains the requested data.
何时出现
This is the normal, successful response to any DNS query — the name was resolved and the answer section contains the requested records.
如何修复
No fix needed. RCODE 0 means the DNS lookup succeeded as expected.
描述
Bad TKEY Mode. The TKEY mode field contains a value not supported by the server.
何时出现
Your client attempted a TKEY key exchange using a mode (e.g., Diffie-Hellman, GSS-API) that the server does not support or has not been configured for.
如何修复
Check which TKEY modes the server supports and configure your client to use a compatible mode. GSS-TSIG (mode 3) is the most widely deployed.
主要区别
DNS 0: No error condition. The query completed successfully and the response contains the requested data.
DNS 19: Bad TKEY Mode. The TKEY mode field contains a value not supported by the server.
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 19 when your client attempted a TKEY key exchange using a mode (e.g., Diffie-Hellman, GSS-API) that the server does not support or has not been configured for.
何时使用哪个
For 0 (NOERROR): No fix needed. RCODE 0 means the DNS lookup succeeded as expected. For 19 (BADMODE): Check which TKEY modes the server supports and configure your client to use a compatible mode. GSS-TSIG (mode 3) is the most widely deployed.