DNS 4 NOTIMP vs 19 BADMODE
Both DNS 4 (NOTIMP) and 19 (BADMODE) belong to the DNS Response Codes (RCODEs) category. 4 indicates that not Implemented. The name server does not support the requested query type or operation. Meanwhile, 19 means that bad TKEY Mode. The TKEY mode field contains a value not supported by the server.
Beschreibung
Not Implemented. The name server does not support the requested query type or operation.
Wann Sie es sehen
You sent a query type (e.g., IXFR, dynamic update) that the server does not support or has disabled.
Wie man es behebt
Verify the server supports the query type you are using. If you need zone transfers or dynamic updates, enable them in the server configuration.
Beschreibung
Bad TKEY Mode. The TKEY mode field contains a value not supported by the server.
Wann Sie es sehen
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.
Wie man es behebt
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.
Wesentliche Unterschiede
DNS 4: Not Implemented. The name server does not support the requested query type or operation.
DNS 19: Bad TKEY Mode. The TKEY mode field contains a value not supported by the server.
You encounter 4 when you sent a query type (e.g., IXFR, dynamic update) that the server does not support or has disabled.
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.
Wann welchen verwenden
For 4 (NOTIMP): Verify the server supports the query type you are using. If you need zone transfers or dynamic updates, enable them in the server configuration. 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.