harvard.edu
Updated:
2025-08-22 17:19:44 UTC (82 days ago)
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Notices
DNSSEC Authentication Chain
RRset status
Insecure (6)
- harvard.edu/A
- harvard.edu/MX
- harvard.edu/NS
- harvard.edu/NSEC3PARAM
- harvard.edu/SOA
- harvard.edu/TXT
Secure (2)
- edu/SOA
- edu/SOA
DNSKEY/DS/NSEC status
Insecure (4)
- harvard.edu/DNSKEY (alg 13, id 22205)
- harvard.edu/DNSKEY (alg 13, id 38415)
- harvard.edu/DNSKEY (alg 13, id 46292)
- harvard.edu/DNSKEY (alg 13, id 9215)
Secure (8)
- ./DNSKEY (alg 8, id 20326)
- ./DNSKEY (alg 8, id 38696)
- ./DNSKEY (alg 8, id 46441)
- ./DNSKEY (alg 8, id 53148)
- NSEC3 proving non-existence of harvard.edu/DS
- edu/DNSKEY (alg 13, id 35663)
- edu/DNSKEY (alg 13, id 59321)
- edu/DS (alg 13, id 35663)
Delegation status
Insecure (1)
- edu to harvard.edu
Secure (1)
- . to edu
Notices
Warnings (3)
- harvard.edu/SOA: 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. (2600:1480:1::43, UDP_-_EDNS0_4096_D_KN_0x20)
- harvard.edu/TXT: 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. (2600:1480:d000::42, UDP_-_EDNS0_4096_D_KN)
- mg3xw.k58vf.harvard.edu/A has warnings; select the "Denial of existence" DNSSEC option to see them.
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