net to verteiltesysteme.net: No valid RRSIGs made by a key corresponding to a DS RR were found covering the DNSKEY RRset, resulting in no secure entry point (SEP) into the zone. See RFC 4035, Sec. 2.2, RFC 6840, Sec. 5.11.
sigok.verteiltesysteme.net/A: No response was received from the server over UDP (tried 12 times). See RFC 1035, Sec. 4.2. (134.91.78.139, 134.91.78.141, 2001:638:501:8efc::139, 2001:638:501:8efc::141, UDP_-_NOEDNS_)
verteiltesysteme.net zone: The server(s) were not responsive to queries over UDP. See RFC 1035, Sec. 4.2. (134.91.78.139, 134.91.78.141, 2001:638:501:8efc::139, 2001:638:501:8efc::141)
verteiltesysteme.net zone: There was an error resolving the following NS name(s) to address(es): ns1.verteiltesysteme.net, ns2.verteiltesysteme.net