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DNSViz: A DNS visualization tool

columbia.edu

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

RRset statusRRset status

Insecure (5)
  • columbia.edu/A
  • columbia.edu/MX
  • columbia.edu/NS
  • columbia.edu/SOA
  • columbia.edu/TXT
Secure (2)
  • edu/SOA
  • edu/SOA

DNSKEY/DS/NSEC statusDNSKEY/DS/NSEC status

Secure (6)
  • ./DNSKEY (alg 8, id 14631)
  • ./DNSKEY (alg 8, id 20326)
  • NSEC3 proving non-existence of columbia.edu/DS
  • edu/DNSKEY (alg 8, id 28065)
  • edu/DNSKEY (alg 8, id 63587)
  • edu/DS (alg 8, id 28065)

Delegation statusDelegation status

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

NoticesNotices

Errors (5)
  • columbia.edu zone: The server(s) were not responsive to queries over UDP. (2001:550:1:a::d, 2001:550:1:b::d, 2001:978:1:a::d, 2001:978:1:b::d)
  • columbia.edu/A: No response was received from the server over UDP (tried 12 times). (2001:550:1:a::d, 2001:550:1:b::d, 2001:978:1:a::d, 2001:978:1:b::d, UDP_-_NOEDNS_)
  • columbia.edu/DNSKEY: The response had an invalid RCODE (FORMERR). (158.143.96.8, UDP_-_EDNS0_512_D_KN)
  • columbia.edu/MX: The response had an invalid RCODE (FORMERR). (158.143.96.8, UDP_-_EDNS0_512_D_KN)
  • columbia.edu/NS: No response was received from the server over UDP (tried 12 times). (2001:550:1:a::d, 2001:550:1:b::d, 2001:978:1:a::d, 2001:978:1:b::d, UDP_-_NOEDNS_)
Warnings (7)
  • columbia.edu/A: The response had an invalid RCODE (FORMERR) until the NSID EDNS option was removed. (158.143.96.8, UDP_-_EDNS0_4096_D_KN)
  • columbia.edu/MX: The response had an invalid RCODE (FORMERR) until the NSID EDNS option was removed. (158.143.96.8, UDP_-_EDNS0_4096_D_KN)
  • columbia.edu/NS: The response had an invalid RCODE (FORMERR) until the NSID EDNS option was removed. (158.143.96.8, UDP_-_EDNS0_4096_D_KN)
  • columbia.edu/SOA: The response had an invalid RCODE (FORMERR) until the NSID EDNS option was removed. (158.143.96.8, TCP_-_EDNS0_4096_D_N)
  • columbia.edu/SOA: The response had an invalid RCODE (FORMERR) until the NSID EDNS option was removed. (158.143.96.8, UDP_-_EDNS0_4096_D_KN, UDP_-_EDNS0_4096_D_KN_0x20)
  • columbia.edu/TXT: The response had an invalid RCODE (FORMERR) until the NSID EDNS option was removed. (158.143.96.8, UDP_-_EDNS0_4096_D_KN)
  • edu to columbia.edu: Authoritative AAAA records exist for ext-ns1.columbia.edu, but there are no corresponding AAAA glue records.

DNSKEY legend

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