NSEC3 proving non-existence of sp.edu.sg/DS: An iterations count of 0 must be used in NSEC3 records to alleviate computational burdens. See RFC 9276, Sec. 3.1.
NSEC3 proving non-existence of sp.edu.sg/DS: An iterations count of 0 must be used in NSEC3 records to alleviate computational burdens. See RFC 9276, Sec. 3.1.
sp.edu.sg zone: The server(s) were not responsive to queries over TCP. See RFC 1035, Sec. 4.2. (164.78.252.51)
sp.edu.sg zone: The server(s) were not responsive to queries over UDP. See RFC 1035, Sec. 4.2. (164.78.252.50, 2403:e900:ff1:e0fc::1:11, 2403:e900:ff1:e0fc::1:12)
sp.edu.sg/A: No response was received from the server over UDP (tried 12 times). See RFC 1035, Sec. 4.2. (164.78.252.50, 164.78.252.51, 2403:e900:ff1:e0fc::1:11, 2403:e900:ff1:e0fc::1:12, UDP_-_NOEDNS_)
sp.edu.sg/AAAA: No response was received from the server over UDP (tried 12 times). See RFC 1035, Sec. 4.2. (164.78.252.51, UDP_-_NOEDNS_)
sp.edu.sg/MX: No response was received from the server over UDP (tried 12 times). See RFC 1035, Sec. 4.2. (164.78.252.51, UDP_-_NOEDNS_)
sp.edu.sg/MX: No response was received from the server over UDP (tried 4 times). See RFC 1035, Sec. 4.2. (164.78.252.51, UDP_-_EDNS0_512_D_KN)
sp.edu.sg/NS: No response was received from the server over UDP (tried 12 times). See RFC 1035, Sec. 4.2. (164.78.252.50, 2403:e900:ff1:e0fc::1:11, 2403:e900:ff1:e0fc::1:12, UDP_-_NOEDNS_)
sp.edu.sg/NSEC3PARAM: No response was received from the server over UDP (tried 12 times). See RFC 1035, Sec. 4.2. (164.78.252.51, UDP_-_NOEDNS_)
sp.edu.sg/SOA: No response was received from the server over TCP (tried 3 times). See RFC 1035, Sec. 4.2. (164.78.252.51, TCP_-_EDNS0_4096_D_N)
sp.edu.sg/SOA: No response was received from the server over UDP (tried 12 times). See RFC 1035, Sec. 4.2. (164.78.252.51, UDP_-_NOEDNS_, UDP_-_NOEDNS__0x20)
sp.edu.sg/DS has errors; select the "Denial of existence" DNSSEC option to see them.
Warnings (4)
NSEC3 proving non-existence of sp.edu.sg/DS: The salt value for an NSEC3 record should be empty. See RFC 9276, Sec. 3.1.
NSEC3 proving non-existence of sp.edu.sg/DS: The salt value for an NSEC3 record should be empty. See RFC 9276, Sec. 3.1.
edu.sg to sp.edu.sg: AAAA glue records exist for sspwb110.sp.edu.sg, but there are no corresponding authoritative AAAA records. See RFC 1034, Sec. 4.2.2.
sp.edu.sg/DS has warnings; select the "Denial of existence" DNSSEC option to see them.