DNS 6 YXDOMAIN vs 9 NOTAUTH
Both DNS 6 (YXDOMAIN) and 9 (NOTAUTH) belong to the DNS Response Codes (RCODEs) category. 6 indicates that name Exists when it should not. Used in dynamic updates to indicate a name that should not exist already has records. Meanwhile, 9 means that server Not Authoritative for zone, or Not Authorized. The server is not authoritative for the zone named in the Zone section.
説明
Name Exists when it should not. Used in dynamic updates to indicate a name that should not exist already has records.
このコードが表示される場合
A DNS UPDATE prerequisite check failed because the domain name already exists when the update expected it to be absent.
解決方法
Review your dynamic update prerequisites. If you expect to create a new name, remove the existing records first or change the prerequisite to allow existing names.
説明
Server Not Authoritative for zone, or Not Authorized. The server is not authoritative for the zone named in the Zone section.
このコードが表示される場合
You sent a dynamic update or zone operation to a server that is not the authoritative master for that zone, or the server rejected it due to TSIG authentication failure.
解決方法
Send the update to the correct primary authoritative server for the zone. If using TSIG, verify the key name and secret match on both client and server.
主な違い
DNS 6: Name Exists when it should not. Used in dynamic updates to indicate a name that should not exist already has records.
DNS 9: Server Not Authoritative for zone, or Not Authorized. The server is not authoritative for the zone named in the Zone section.
You encounter 6 when a DNS UPDATE prerequisite check failed because the domain name already exists when the update expected it to be absent.
You encounter 9 when you sent a dynamic update or zone operation to a server that is not the authoritative master for that zone, or the server rejected it due to TSIG authentication failure.
どちらをいつ使うか
For 6 (YXDOMAIN): Review your dynamic update prerequisites. If you expect to create a new name, remove the existing records first or change the prerequisite to allow existing names. For 9 (NOTAUTH): Send the update to the correct primary authoritative server for the zone. If using TSIG, verify the key name and secret match on both client and server.