OK, unti yesterday I had a server under observation. Let’s call it “badserver”. Finally I was able to make all run.
This morning I had to setup a new server on a completely different machine, but same name “badserver”. DNS records have been redirected to the new IP.
If I ping the host on my CMK server, I get the correct IP resolved, the new one.
However, I can see, that cmk --debug -vvn badserver is still using the old IP, hence no services can be enumerated and attempts to establish TLS connections fail.
I was deleting the old host from CMK and inserting the new (same name) again. But that seems to be not sufficient, since CMK works internally with the old IPs.
