mil/DNSKEY (alg 8, id 26770): No response was received until the UDP payload size was decreased, indicating that the server might be attempting to send a payload that exceeds the path maximum transmission unit (PMTU) size. See RFC 6891, Sec. 6.2.6. (199.252.143.234, UDP_-_EDNS0_4096_D_KN)
mil/DNSKEY (alg 8, id 40843): No response was received until the UDP payload size was decreased, indicating that the server might be attempting to send a payload that exceeds the path maximum transmission unit (PMTU) size. See RFC 6891, Sec. 6.2.6. (199.252.143.234, UDP_-_EDNS0_4096_D_KN)
mil/DNSKEY (alg 8, id 63500): No response was received until the UDP payload size was decreased, indicating that the server might be attempting to send a payload that exceeds the path maximum transmission unit (PMTU) size. See RFC 6891, Sec. 6.2.6. (199.252.143.234, UDP_-_EDNS0_4096_D_KN)
mil/DNSKEY has warnings; select the "Denial of existence" DNSSEC option to see them.