DNS 3 NXDOMAIN vs 17 BADKEY
Both DNS 3 (NXDOMAIN) and 17 (BADKEY) belong to the DNS Response Codes (RCODEs) category. 3 indicates that non-Existent Domain. The queried domain name does not exist in the DNS namespace. Meanwhile, 17 means that key not recognized. The TSIG key name in the message is not configured on the server.
Mô tả
Non-Existent Domain. The queried domain name does not exist in the DNS namespace.
Khi bạn thấy mã này
The domain has no DNS records at all — either it was never registered, has expired, or you have a typo in the hostname.
Cách khắc phục
Double-check the domain spelling. If you own the domain, verify your registrar settings and ensure the nameservers are correctly delegated.
Mô tả
Key not recognized. The TSIG key name in the message is not configured on the server.
Khi bạn thấy mã này
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.
Cách khắc phục
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.
Sự khác biệt chính
DNS 3: Non-Existent Domain. The queried domain name does not exist in the DNS namespace.
DNS 17: Key not recognized. The TSIG key name in the message is not configured on the server.
You encounter 3 when the domain has no DNS records at all — either it was never registered, has expired, or you have a typo in the hostname.
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.
Khi nào dùng cái nào
For 3 (NXDOMAIN): Double-check the domain spelling. If you own the domain, verify your registrar settings and ensure the nameservers are correctly delegated. 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.