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.
Beschreibung
RR Set that should exist does not. A required resource record set is missing from the zone.
Wann Sie es sehen
A DNS UPDATE prerequisite expected a certain RRset to exist (e.g., an MX record), but the zone does not contain it.
Wie man es behebt
Create the missing RRset in the zone before retrying the update, or change the prerequisite to not require its existence.
Beschreibung
Duplicate key name. The key name in a TKEY negotiation is already in use or conflicts with an existing key.
Wann Sie es sehen
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.
Wie man es behebt
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.
Wesentliche Unterschiede
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.
Wann welchen verwenden
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.