DNS 11 DSOTYPENI vs 20 BADNAME
Both DNS 11 (DSOTYPENI) and 20 (BADNAME) belong to the DNS Response Codes (RCODEs) category. 11 indicates that dSO-TYPE Not Implemented. The DNS Stateful Operations (DSO) type in the request is not supported by the server. Meanwhile, 20 means that duplicate key name. The key name in a TKEY negotiation is already in use or conflicts with an existing key.
설명
DSO-TYPE Not Implemented. The DNS Stateful Operations (DSO) type in the request is not supported by the server.
이 코드를 보게 되는 경우
Your client attempted a DSO operation (like a keepalive or push subscription) that the server does not recognize or has not implemented.
해결 방법
Verify that both client and server support the same DSO-TYPE. Upgrade the server software or fall back to traditional DNS queries.
설명
Duplicate key name. The key name in a TKEY negotiation is already in use or conflicts with an existing key.
이 코드를 보게 되는 경우
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.
해결 방법
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.
주요 차이점
DNS 11: DSO-TYPE Not Implemented. The DNS Stateful Operations (DSO) type in the request is not supported by the server.
DNS 20: Duplicate key name. The key name in a TKEY negotiation is already in use or conflicts with an existing key.
You encounter 11 when your client attempted a DSO operation (like a keepalive or push subscription) that the server does not recognize or has not implemented.
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.
언제 어떤 것을 사용할지
For 11 (DSOTYPENI): Verify that both client and server support the same DSO-TYPE. Upgrade the server software or fall back to traditional DNS queries. 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.