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DNSViz: A DNS visualization tool

harvard.edu

DNSSEC options (hide)
  1. |?|
  2. |?|
  3. |?|
  4. |?|
  5. |?|
  6. |?|
  7. |?|
  8. |?|
  9. |?|
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Notices
DNSSEC Authentication Chain

RRset statusRRset 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 statusDNSKEY/DS/NSEC status

Insecure (4)
  • harvard.edu/DNSKEY (alg 13, id 33366)
  • 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 statusDelegation status

Insecure (1)
  • edu to harvard.edu
Secure (1)
  • . to edu

NoticesNotices

Warnings (6)
  • harvard.edu/A: 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)
  • harvard.edu/SOA: No response was received from the server over UDP (tried 6 times) until the COOKIE EDNS option was removed (however, this server appeared to respond legitimately to other queries with the COOKIE EDNS option present). See RFC 6891, Sec. 6.1.2. (2600:1480:1::43, UDP_-_EDNS0_4096_D_KN)
  • 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)
  • harvard.edu/CDS has warnings; select the "Denial of existence" DNSSEC option to see them.
  • harvard.edu/CDNSKEY has warnings; select the "Denial of existence" DNSSEC option to see them.
  • qv2ur.vd9ib.harvard.edu/A has warnings; select the "Denial of existence" DNSSEC option to see them.

DNSKEY legend

Full legend
SEP bit setSEP bit set
Revoke bit setRevoke bit set
Trust anchorTrust anchor
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DNSSEC authentication graph