cn zone: The server(s) were not responsive to queries over UDP. (203.119.27.1)
cn/DNSKEY: No response was received from the server over UDP (tried 4 times). (66.198.183.65, UDP_-_EDNS0_512_D_K)
Warnings (5)
. to cn: Authoritative AAAA records exist for ns.cernet.net, but there are no corresponding AAAA glue records.
. to cn: The glue address(es) for ns.cernet.net (202.112.0.44) differed from its authoritative address(es) (103.137.60.44).
cn to sina.cn: The following NS name(s) were found in the authoritative NS RRset, but not in the delegation NS RRset (i.e., in the cn zone): ns1.sina.com.cn
cn/DNSKEY (alg 8, id 38388): 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. (66.198.183.65, UDP_-_EDNS0_4096_D_K)
cn/DNSKEY (alg 8, id 57724): 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. (66.198.183.65, UDP_-_EDNS0_4096_D_K)