The problem is old. Unbound does not resolve. I upgraded today to OpenBSD 7.4, before I did not use the Nettop for some months. But when I upgraded to 7.3 it worked, today neither before nor after upgrading to 7.4 worked.
I added to the standard configuration file only: do-ip6: no log-servfail: yes It /var/log/messages I got first: """"""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""" Jan 5 16:39:30 nc10 unbound: [3480:0] notice: init module 0: validator Jan 5 16:39:30 nc10 unbound: [3480:0] notice: init module 1: iterator Jan 5 16:39:31 nc10 unbound: [3480:0] error: SERVFAIL <. NS IN>: failed to get a delegation (eg. prime failure) Jan 5 16:39:32 nc10 unbound: [3480:0] error: SERVFAIL <. NS IN>: failed to get a delegation (eg. prime failure) """""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""" And after looking up again with drill: """"""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""" Jan 5 16:46:18 nc10 unbound: [3480:0] error: SERVFAIL <web.de. A IN>: exceeded the maximum number of sends """"""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""" Then no more messages. Any idea what is happening? Rod.