DNS
11 DSOTYPENI
DSO-TYPE Not Implemented. The DNS Stateful Operations (DSO) type in the request is not supported by the server.
Wenn Sie diesen Code sehen
Your client attempted a DSO operation (like a keepalive or push subscription) that the server does not recognize or has not implemented.
Wie man es behebt
Verify that both client and server support the same DSO-TYPE. Upgrade the server software or fall back to traditional DNS queries.