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.
Descrição
No error condition. The query completed successfully and the response contains the requested data.
Quando você o vê
This is the normal, successful response to any DNS query — the name was resolved and the answer section contains the requested records.
Como corrigir
No fix needed. RCODE 0 means the DNS lookup succeeded as expected.
Descrição
Bad TKEY Mode. The TKEY mode field contains a value not supported by the server.
Quando você o vê
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.
Como corrigir
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.
Diferenças principais
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.
Quando usar qual
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.