cz to cvut.cz: 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. (147.32.1.9, 147.32.1.20, 2001:718:2:2200::100, 2001:718:2:2200::101, UDP_-_EDNS0_4096_D_KN, UDP_-_EDNS0_512_D_KN)
cz to cvut.cz: The DS RRset for the zone included algorithm 13 (ECDSAP256SHA256), but no DS RR matched a DNSKEY with algorithm 13 that signs the zone's DNSKEY RRset. See RFC 4035, Sec. 2.2, RFC 6840, Sec. 5.11. (147.32.1.9, 147.32.1.20, 2001:718:2:2200::100, 2001:718:2:2200::101, UDP_-_EDNS0_4096_D_KN, UDP_-_EDNS0_512_D_KN)
fjfi.cvut.cz/DS (alg 13, id 38165): No RRSIG covering the RRset was returned in the response. See RFC 4035, Sec. 3.1.1. (147.32.1.9, 147.32.1.20, 2001:718:2:2200::100, 2001:718:2:2200::101, UDP_-_EDNS0_4096_D_KN)
fjfi.cvut.cz/DS (alg 13, id 38165): No RRSIG covering the RRset was returned in the response. See RFC 4035, Sec. 3.1.1. (147.32.1.9, 147.32.1.20, 2001:718:2:2200::100, 2001:718:2:2200::101, UDP_-_EDNS0_4096_D_KN)
fjfi.cvut.cz/DS has errors; select the "Denial of existence" DNSSEC option to see them.
fjfi.cvut.cz/AAAA has errors; select the "Denial of existence" DNSSEC option to see them.
ibpfoe5vk4.fjfi.cvut.cz/A has errors; select the "Denial of existence" DNSSEC option to see them.
fjfi.cvut.cz/CNAME has errors; select the "Denial of existence" DNSSEC option to see them.
Warnings (5)
cz/DS (alg 13, id 20237): The server appears to support DNS cookies but did not return a COOKIE option. See RFC 7873, Sec. 5.2.3. (2001:500:2f::f, UDP_-_EDNS0_4096_D_KN)
cz/DS (alg 13, id 20237): The server appears to support DNS cookies but did not return a COOKIE option. See RFC 7873, Sec. 5.2.3. (2001:500:2f::f, UDP_-_EDNS0_4096_D_KN)
fjfi.cvut.cz/AAAA has warnings; select the "Denial of existence" DNSSEC option to see them.
ibpfoe5vk4.fjfi.cvut.cz/A has warnings; select the "Denial of existence" DNSSEC option to see them.
fjfi.cvut.cz/CNAME has warnings; select the "Denial of existence" DNSSEC option to see them.