DNS 6 YXDOMAIN vs 20 BADNAME
Both DNS 6 (YXDOMAIN) and 20 (BADNAME) 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, 20 means that duplicate key name. The key name in a TKEY negotiation is already in use or conflicts with an existing key.
Beschreibung
Name Exists when it should not. Used in dynamic updates to indicate a name that should not exist already has records.
Wann Sie es sehen
A DNS UPDATE prerequisite check failed because the domain name already exists when the update expected it to be absent.
Wie man es behebt
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.
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 6: Name Exists when it should not. Used in dynamic updates to indicate a name that should not exist already has records.
DNS 20: Duplicate key name. The key name in a TKEY negotiation is already in use or conflicts with an existing key.
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 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 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 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.