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.
Mô tả
Name Exists when it should not. Used in dynamic updates to indicate a name that should not exist already has records.
Khi bạn thấy mã này
A DNS UPDATE prerequisite check failed because the domain name already exists when the update expected it to be absent.
Cách khắc phục
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.
Mô tả
Duplicate key name. The key name in a TKEY negotiation is already in use or conflicts with an existing key.
Khi bạn thấy mã này
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.
Cách khắc phục
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.
Sự khác biệt chính
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.
Khi nào dùng cái nào
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.