View on GitHub

DNSViz: A DNS visualization tool

clinicaltrials.gov

DNSSEC options (hide)
  1. |?|
  2. |?|
  3. |?|
  4. |?|
  5. |?|
  6. |?|
  7. |?|
  8. |?|
  9. |?|
  10. |?|
Notices
DNSSEC Authentication Chain

RRset statusRRset status

Bogus (3)
  • clinicaltrials.gov/MX (NODATA)
  • clinicaltrials.gov/SOA (NODATA)
  • clinicaltrials.gov/TXT (NODATA)
Secure (11)
  • clinicaltrials.gov/A
  • clinicaltrials.gov/AAAA
  • clinicaltrials.gov/MX
  • clinicaltrials.gov/NS
  • clinicaltrials.gov/NSEC3PARAM
  • clinicaltrials.gov/NSEC3PARAM
  • clinicaltrials.gov/NSEC3PARAM
  • clinicaltrials.gov/NSEC3PARAM
  • clinicaltrials.gov/NSEC3PARAM
  • clinicaltrials.gov/SOA
  • clinicaltrials.gov/TXT

DNSKEY/DS/NSEC statusDNSKEY/DS/NSEC status

Secure (9)
  • ./DNSKEY (alg 8, id 18733)
  • ./DNSKEY (alg 8, id 20326)
  • ./DNSKEY (alg 8, id 951)
  • clinicaltrials.gov/DNSKEY (alg 8, id 35580)
  • clinicaltrials.gov/DNSKEY (alg 8, id 5749)
  • clinicaltrials.gov/DS (alg 8, id 5749)
  • gov/DNSKEY (alg 8, id 56278)
  • gov/DNSKEY (alg 8, id 7698)
  • gov/DS (alg 8, id 7698)

Delegation statusDelegation status

Secure (2)
  • . to gov
  • gov to clinicaltrials.gov

NoticesNotices

Errors (24)
  • clinicaltrials.gov zone: The server(s) were not responsive to queries over TCP. See RFC 1035, Sec. 4.2. (130.14.252.50, 130.14.252.53, 165.112.6.3, 2607:f220:41f:1405::3)
  • clinicaltrials.gov/AAAA: No response was received from the server over UDP (tried 12 times). See RFC 1035, Sec. 4.2. (2607:f220:41e:252::53, UDP_-_NOEDNS_)
  • clinicaltrials.gov/DNSKEY: No response was received from the server over TCP (tried 12 times). See RFC 1035, Sec. 4.2. (130.14.252.50, TCP_-_EDNS0_4096_D_KN)
  • clinicaltrials.gov/MX (NODATA): No NSEC RR(s) were returned to validate the NODATA response. See RFC 4035, Sec. 3.1.3.1, RFC 5155, Sec. 7.2.3, RFC 5155, Sec. 7.2.4. (165.112.6.3, UDP_-_EDNS0_4096_D_KN)
  • clinicaltrials.gov/MX (NODATA): The Authoritative Answer (AA) flag was not set in the response. See RFC 1035, Sec. 4.1.1. (165.112.6.3, UDP_-_EDNS0_4096_D_KN)
  • clinicaltrials.gov/MX (NODATA): The NODATA response did not include an SOA record. See RFC 1034, Sec. 4.3.4, RFC 2308, Sec. 2.2. (165.112.6.3, UDP_-_EDNS0_4096_D_KN)
  • clinicaltrials.gov/MX: DNSSEC was effectively downgraded because no response was received from the server over UDP (tried 11 times) with EDNS enabled. See RFC 6891, Sec. 7, RFC 2671, Sec. 5.3. (2607:f220:41e:252::50, UDP_-_NOEDNS_)
  • clinicaltrials.gov/MX: No response was received from the server over UDP (tried 11 times) until EDNS was disabled (however, this server appeared to respond legitimately to other queries with EDNS enabled). See RFC 6891, Sec. 6.2.6. (2607:f220:41e:252::50, UDP_-_EDNS0_4096_D_KN)
  • clinicaltrials.gov/MX: No response was received from the server over UDP (tried 12 times). See RFC 1035, Sec. 4.2. (2607:f220:41f:1405::3, UDP_-_NOEDNS_)
  • clinicaltrials.gov/MX: The DNSSEC records necessary to validate the response could not be retrieved from the server. See RFC 4035, Sec. 3.1.1, RFC 4035, Sec. 3.1.3. (2607:f220:41e:252::50, UDP_-_EDNS0_4096_D_KN)
  • clinicaltrials.gov/NS: The Authoritative Answer (AA) flag was not set in the response. See RFC 1035, Sec. 4.1.1. (165.112.6.3, 2607:f220:41f:1405::3, UDP_-_EDNS0_4096_D_KN)
  • clinicaltrials.gov/SOA (NODATA): No NSEC RR(s) were returned to validate the NODATA response. See RFC 4035, Sec. 3.1.3.1, RFC 5155, Sec. 7.2.3, RFC 5155, Sec. 7.2.4. (165.112.6.3, UDP_-_EDNS0_4096_D_KN, UDP_-_EDNS0_4096_D_KN_0x20)
  • clinicaltrials.gov/SOA (NODATA): The Authoritative Answer (AA) flag was not set in the response. See RFC 1035, Sec. 4.1.1. (165.112.6.3, UDP_-_EDNS0_4096_D_KN, UDP_-_EDNS0_4096_D_KN_0x20)
  • clinicaltrials.gov/SOA (NODATA): The NODATA response did not include an SOA record. See RFC 1034, Sec. 4.3.4, RFC 2308, Sec. 2.2. (165.112.6.3, UDP_-_EDNS0_4096_D_KN, UDP_-_EDNS0_4096_D_KN_0x20)
  • clinicaltrials.gov/SOA: No response was received from the server over TCP (tried 3 times). See RFC 1035, Sec. 4.2. (130.14.252.50, 130.14.252.53, 165.112.6.3, 2607:f220:41f:1405::3, TCP_-_EDNS0_4096_D_N)
  • clinicaltrials.gov/SOA: No response was received from the server over TCP (tried 7 times). See RFC 1035, Sec. 4.2. (2607:f220:41f:1405::3, TCP_-_EDNS0_4096_D_KN_0x20)
  • clinicaltrials.gov/SOA: No response was received from the server over UDP (tried 12 times). See RFC 1035, Sec. 4.2. (2607:f220:41e:252::50, 2607:f220:41f:1405::3, UDP_-_NOEDNS_)
  • clinicaltrials.gov/TXT (NODATA): No NSEC RR(s) were returned to validate the NODATA response. See RFC 4035, Sec. 3.1.3.1, RFC 5155, Sec. 7.2.3, RFC 5155, Sec. 7.2.4. (165.112.6.3, UDP_-_EDNS0_4096_D_KN)
  • clinicaltrials.gov/TXT (NODATA): The Authoritative Answer (AA) flag was not set in the response. See RFC 1035, Sec. 4.1.1. (165.112.6.3, UDP_-_EDNS0_4096_D_KN)
  • clinicaltrials.gov/TXT (NODATA): The NODATA response did not include an SOA record. See RFC 1034, Sec. 4.3.4, RFC 2308, Sec. 2.2. (165.112.6.3, UDP_-_EDNS0_4096_D_KN)
  • clinicaltrials.gov/TXT: No response was received from the server over UDP (tried 12 times). See RFC 1035, Sec. 4.2. (2607:f220:41f:1405::3, UDP_-_NOEDNS_)
  • clinicaltrials.gov/DNSKEY has errors; select the "Denial of existence" DNSSEC option to see them.
  • clinicaltrials.gov/CNAME has errors; select the "Denial of existence" DNSSEC option to see them.
  • l9mqgp3wx0.clinicaltrials.gov/A has errors; select the "Denial of existence" DNSSEC option to see them.
Warnings (5)
  • clinicaltrials.gov/MX: The Authoritative Answer (AA) flag was not set in the response. See RFC 1035, Sec. 4.1.1. (165.112.6.3, 2607:f220:41f:1405::3, UDP_-_EDNS0_512_D_KN)
  • clinicaltrials.gov/NS: 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. (130.14.252.53, UDP_-_EDNS0_4096_D_KN)
  • clinicaltrials.gov/NSEC3PARAM: 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. (130.14.252.53, UDP_-_EDNS0_4096_D_KN)
  • clinicaltrials.gov/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. (2607:f220:41e:252::50, 2607:f220:41e:252::53, UDP_-_EDNS0_4096_D_KN, UDP_-_EDNS0_4096_D_KN_0x20)
  • clinicaltrials.gov/CNAME 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
Download: png | svg
Warning JavaScript is required to make the graph below interactive.
DNSSEC authentication graph