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DNSViz: A DNS visualization tool

ntsb.gov

DNSSEC options (hide)
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Notices
DNSSEC Authentication Chain

RRset statusRRset status

Bogus (7)
  • ntsb.gov/A
  • ntsb.gov/AAAA
  • ntsb.gov/MX
  • ntsb.gov/NS
  • ntsb.gov/NSEC3PARAM
  • ntsb.gov/SOA
  • ntsb.gov/TXT

DNSKEY/DS/NSEC statusDNSKEY/DS/NSEC status

Bogus (4)
  • ntsb.gov/DNSKEY (alg 8, id 20340)
  • ntsb.gov/DNSKEY (alg 8, id 24355)
  • ntsb.gov/DNSKEY (alg 8, id 48033)
  • ntsb.gov/DNSKEY (alg 8, id 65305)
Secure (9)
  • ./DNSKEY (alg 8, id 20326)
  • ./DNSKEY (alg 8, id 9799)
  • gov/DNSKEY (alg 8, id 7030)
  • gov/DNSKEY (alg 8, id 7698)
  • gov/DS (alg 8, id 7698)
  • ntsb.gov/DS (alg 8, id 24355)
  • ntsb.gov/DS (alg 8, id 24355)
  • ntsb.gov/DS (alg 8, id 65305)
  • ntsb.gov/DS (alg 8, id 65305)

Delegation statusDelegation status

Bogus (1)
  • gov to ntsb.gov
Secure (1)
  • . to gov

NoticesNotices

Errors (26)
  • gov to ntsb.gov: No valid RRSIGs made by a key corresponding to a DS RR were found covering the DNSKEY RRset, resulting in no secure entry point (SEP) into the zone. See RFC 4035, Sec. 2.2, RFC 6840, Sec. 5.11. (152.180.40.110, UDP_-_EDNS0_4096_D_KN)
  • gov to ntsb.gov: The DS RRset for the zone included algorithm 8 (RSASHA256), but no DS RR matched a DNSKEY with algorithm 8 that signs the zone's DNSKEY RRset. See RFC 4035, Sec. 2.2, RFC 6840, Sec. 5.11. (152.180.40.110, UDP_-_EDNS0_4096_D_KN)
  • ntsb.gov zone: The following NS name(s) did not resolve to address(es): ns
  • ntsb.gov zone: The server(s) were not responsive to queries over TCP. See RFC 1035, Sec. 4.2. (152.180.40.110)
  • ntsb.gov zone: The server(s) were not responsive to queries over UDP. See RFC 1035, Sec. 4.2. (2600:803:250:1040::110)
  • ntsb.gov zone: There was an error resolving the following NS name(s) to address(es): ns.ntsb.gov
  • ntsb.gov/A: DNSSEC was effectively downgraded because no response was received from the server over UDP (tried 10 times) with the DO bit set. See RFC 4035, Sec. 3.2.1. (152.180.40.110, UDP_-_EDNS0_4096_)
  • ntsb.gov/A: No response was received from the server over UDP (tried 10 times) until the DO EDNS flag was cleared (however, this server appeared to respond legitimately to other queries with the DO EDNS flag set). See RFC 6891, Sec. 6.1.4. (152.180.40.110, UDP_-_EDNS0_4096_D_KN)
  • ntsb.gov/A: No response was received from the server over UDP (tried 12 times). See RFC 1035, Sec. 4.2. (2600:803:250:1040::110, UDP_-_NOEDNS_)
  • ntsb.gov/A: 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. (152.180.40.110, UDP_-_EDNS0_4096_D_KN)
  • ntsb.gov/AAAA: No RRSIG covering the RRset was returned in the response. See RFC 4035, Sec. 3.1.1. (152.180.40.110, UDP_-_EDNS0_4096_D_KN)
  • ntsb.gov/DNSKEY (alg 8, id 20340): No RRSIG covering the RRset was returned in the response. See RFC 4035, Sec. 3.1.1. (152.180.40.110, UDP_-_EDNS0_4096_D_KN)
  • ntsb.gov/DNSKEY (alg 8, id 24355): No RRSIG covering the RRset was returned in the response. See RFC 4035, Sec. 3.1.1. (152.180.40.110, UDP_-_EDNS0_4096_D_KN)
  • ntsb.gov/DNSKEY (alg 8, id 48033): No RRSIG covering the RRset was returned in the response. See RFC 4035, Sec. 3.1.1. (152.180.40.110, UDP_-_EDNS0_4096_D_KN)
  • ntsb.gov/DNSKEY (alg 8, id 65305): No RRSIG covering the RRset was returned in the response. See RFC 4035, Sec. 3.1.1. (152.180.40.110, UDP_-_EDNS0_4096_D_KN)
  • ntsb.gov/MX: No RRSIG covering the RRset was returned in the response. See RFC 4035, Sec. 3.1.1. (152.180.40.110, UDP_-_EDNS0_4096_D_KN, UDP_-_EDNS0_512_D_KN)
  • ntsb.gov/NS: No RRSIG covering the RRset was returned in the response. See RFC 4035, Sec. 3.1.1. (152.180.40.110, UDP_-_EDNS0_4096_D_KN)
  • ntsb.gov/NS: No response was received from the server over UDP (tried 12 times). See RFC 1035, Sec. 4.2. (2600:803:250:1040::110, UDP_-_NOEDNS_)
  • ntsb.gov/NSEC3PARAM: No RRSIG covering the RRset was returned in the response. See RFC 4035, Sec. 3.1.1. (152.180.40.110, UDP_-_EDNS0_4096_D_KN)
  • ntsb.gov/SOA: No RRSIG covering the RRset was returned in the response. See RFC 4035, Sec. 3.1.1. (152.180.40.110, UDP_-_EDNS0_4096_D, UDP_-_EDNS0_4096_D_KN)
  • ntsb.gov/SOA: No response was received from the server over UDP (tried 12 times). See RFC 1035, Sec. 4.2. (152.180.40.110, UDP_-_NOEDNS__0x20)
  • ntsb.gov/SOA: There was an error communicating with the server over TCP (UNKNOWN). See RFC 1035, Sec. 4.2. (152.180.40.110, TCP_-_EDNS0_4096_D_N)
  • ntsb.gov/TXT: No RRSIG covering the RRset was returned in the response. See RFC 4035, Sec. 3.1.1. (152.180.40.110, UDP_-_EDNS0_4096_D_KN)
  • 2jrqi1w69n.ntsb.gov/A has errors; select the "Denial of existence" DNSSEC option to see them.
  • ntsb.gov/DNSKEY has errors; select the "Denial of existence" DNSSEC option to see them.
  • ntsb.gov/CNAME has errors; select the "Denial of existence" DNSSEC option to see them.
Warnings (10)
  • gov to ntsb.gov: The following NS name(s) were found in the authoritative NS RRset, but not in the delegation NS RRset (i.e., in the gov zone): ns See RFC 1034, Sec. 4.2.2.
  • ntsb.gov/DS (alg 8, id 24355): DNSSEC implementers are prohibited from implementing signing with DS algorithm 1 (SHA-1). See RFC 8624, Sec. 3.2.
  • ntsb.gov/DS (alg 8, id 24355): DNSSEC implementers are prohibited from implementing signing with DS algorithm 1 (SHA-1). See RFC 8624, Sec. 3.2.
  • ntsb.gov/DS (alg 8, id 24355): DS records with digest type 1 (SHA-1) are ignored when DS records with digest type 2 (SHA-256) exist in the same RRset. See RFC 4509, Sec. 3.
  • ntsb.gov/DS (alg 8, id 24355): DS records with digest type 1 (SHA-1) are ignored when DS records with digest type 2 (SHA-256) exist in the same RRset. See RFC 4509, Sec. 3.
  • ntsb.gov/DS (alg 8, id 65305): DNSSEC implementers are prohibited from implementing signing with DS algorithm 1 (SHA-1). See RFC 8624, Sec. 3.2.
  • ntsb.gov/DS (alg 8, id 65305): DNSSEC implementers are prohibited from implementing signing with DS algorithm 1 (SHA-1). See RFC 8624, Sec. 3.2.
  • ntsb.gov/DS (alg 8, id 65305): DS records with digest type 1 (SHA-1) are ignored when DS records with digest type 2 (SHA-256) exist in the same RRset. See RFC 4509, Sec. 3.
  • ntsb.gov/DS (alg 8, id 65305): DS records with digest type 1 (SHA-1) are ignored when DS records with digest type 2 (SHA-256) exist in the same RRset. See RFC 4509, Sec. 3.
  • ntsb.gov/NS: 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. (152.180.40.110, UDP_-_EDNS0_4096_D_KN)

DNSKEY legend

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