DNS 1 FORMERR vs 19 BADMODE
Both DNS 1 (FORMERR) and 19 (BADMODE) belong to the DNS Response Codes (RCODEs) category. 1 indicates that format error. The name server was unable to interpret the query due to a malformed DNS message. Meanwhile, 19 means that bad TKEY Mode. The TKEY mode field contains a value not supported by the server.
Deskripsi
Format error. The name server was unable to interpret the query due to a malformed DNS message.
Ketika Anda Melihatnya
Your DNS client or library sent a query the server could not parse, often caused by a buggy resolver, corrupted packet, or unsupported EDNS options.
Cara Memperbaiki
Check your DNS client or library version for known bugs. Capture the raw query with dig or Wireshark and verify it conforms to the DNS wire format.
Deskripsi
Bad TKEY Mode. The TKEY mode field contains a value not supported by the server.
Ketika Anda Melihatnya
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.
Cara Memperbaiki
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.
Perbedaan Utama
DNS 1: Format error. The name server was unable to interpret the query due to a malformed DNS message.
DNS 19: Bad TKEY Mode. The TKEY mode field contains a value not supported by the server.
You encounter 1 when your DNS client or library sent a query the server could not parse, often caused by a buggy resolver, corrupted packet, or unsupported EDNS options.
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.
Kapan Menggunakan Yang Mana
For 1 (FORMERR): Check your DNS client or library version for known bugs. Capture the raw query with dig or Wireshark and verify it conforms to the DNS wire format. 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.