DNS 8 NXRRSET vs 20 BADNAME
Both DNS 8 (NXRRSET) and 20 (BADNAME) belong to the DNS Response Codes (RCODEs) category. 8 indicates that rR Set that should exist does not. A required resource record set is missing from the zone. Meanwhile, 20 means that duplicate key name. The key name in a TKEY negotiation is already in use or conflicts with an existing key.
คำอธิบาย
RR Set that should exist does not. A required resource record set is missing from the zone.
เมื่อคุณพบเห็น
A DNS UPDATE prerequisite expected a certain RRset to exist (e.g., an MX record), but the zone does not contain it.
วิธีแก้ไข
Create the missing RRset in the zone before retrying the update, or change the prerequisite to not require its existence.
คำอธิบาย
Duplicate key name. The key name in a TKEY negotiation is already in use or conflicts with an existing key.
เมื่อคุณพบเห็น
A TKEY key establishment failed because a key with the same name already exists on the server from a previous session that was not properly cleaned up.
วิธีแก้ไข
Use a unique key name for each TKEY session (e.g., append a timestamp or random suffix). Delete stale keys on the server if they are no longer needed.
ความแตกต่างหลัก
DNS 8: RR Set that should exist does not. A required resource record set is missing from the zone.
DNS 20: Duplicate key name. The key name in a TKEY negotiation is already in use or conflicts with an existing key.
You encounter 8 when a DNS UPDATE prerequisite expected a certain RRset to exist (e.g., an MX record), but the zone does not contain it.
You encounter 20 when a TKEY key establishment failed because a key with the same name already exists on the server from a previous session that was not properly cleaned up.
ควรใช้อันไหนเมื่อไร
For 8 (NXRRSET): Create the missing RRset in the zone before retrying the update, or change the prerequisite to not require its existence. For 20 (BADNAME): Use a unique key name for each TKEY session (e.g., append a timestamp or random suffix). Delete stale keys on the server if they are no longer needed.