DNS 5 REFUSED vs 17 BADKEY
Both DNS 5 (REFUSED) and 17 (BADKEY) belong to the DNS Response Codes (RCODEs) category. 5 indicates that query refused. The name server refuses to perform the requested operation for policy reasons. Meanwhile, 17 means that key not recognized. The TSIG key name in the message is not configured on the server.
Descrição
Query refused. The name server refuses to perform the requested operation for policy reasons.
Quando você o vê
The server rejected your query due to access control — for example, a recursive resolver that only serves its own network, or a zone transfer blocked by ACL.
Como corrigir
Check the server's allow-query, allow-recursion, or allow-transfer ACLs. If you are not authorized to use this resolver, switch to a public DNS service.
Descrição
Key not recognized. The TSIG key name in the message is not configured on the server.
Quando você o vê
Your TSIG-signed query or update references a key name that the server does not have in its keyring, so it cannot verify the signature.
Como corrigir
Ensure the TSIG key name matches exactly (case-sensitive) on both client and server. Add the missing key to the server's configuration if it is a new key.
Diferenças principais
DNS 5: Query refused. The name server refuses to perform the requested operation for policy reasons.
DNS 17: Key not recognized. The TSIG key name in the message is not configured on the server.
You encounter 5 when the server rejected your query due to access control — for example, a recursive resolver that only serves its own network, or a zone transfer blocked by ACL.
You encounter 17 when your TSIG-signed query or update references a key name that the server does not have in its keyring, so it cannot verify the signature.
Quando usar qual
For 5 (REFUSED): Check the server's allow-query, allow-recursion, or allow-transfer ACLs. If you are not authorized to use this resolver, switch to a public DNS service. For 17 (BADKEY): Ensure the TSIG key name matches exactly (case-sensitive) on both client and server. Add the missing key to the server's configuration if it is a new key.