DNS 6 YXDOMAIN vs 19 BADMODE
Both DNS 6 (YXDOMAIN) and 19 (BADMODE) 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, 19 means that bad TKEY Mode. The TKEY mode field contains a value not supported by the server.
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
Bad TKEY Mode. The TKEY mode field contains a value not supported by the server.
このコードが表示される場合
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.
解決方法
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 19: Bad TKEY Mode. The TKEY mode field contains a value not supported by the server.
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 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.
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 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.