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DNSViz: A DNS visualization tool

yahoo.com

DNSSEC options (hide)
  1. |?|
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Notices
DNSSEC Authentication Chain

RRset statusRRset status

Insecure (6)
  • yahoo.com/A
  • yahoo.com/AAAA
  • yahoo.com/MX
  • yahoo.com/NS
  • yahoo.com/SOA
  • yahoo.com/TXT
Secure (2)
  • com/SOA
  • com/SOA

DNSKEY/DS/NSEC statusDNSKEY/DS/NSEC status

Secure (7)
  • ./DNSKEY (alg 8, id 14748)
  • ./DNSKEY (alg 8, id 20326)
  • NSEC3 proving non-existence of yahoo.com/DS
  • com/DNSKEY (alg 8, id 15549)
  • com/DNSKEY (alg 8, id 30909)
  • com/DNSKEY (alg 8, id 39343)
  • com/DS (alg 8, id 30909)

Delegation statusDelegation status

Insecure (1)
  • com to yahoo.com
Secure (1)
  • . to com

NoticesNotices

Errors (6)
  • yahoo.com zone: The server(s) were not responsive to queries over TCP. See RFC 1035, Sec. 4.2. (27.123.42.42, 98.138.11.157, 2001:4998:1b0::7961:686f:6f21, 2406:2000:1d0::7961:686f:6f21, 2406:8600:f03f:1f8::1003)
  • yahoo.com/DNSKEY: No response was received from the server over TCP (tried 8 times). See RFC 1035, Sec. 4.2. (27.123.42.42, TCP_-_EDNS0_4096_D)
  • yahoo.com/MX: No response was received from the server over UDP (tried 4 times). See RFC 1035, Sec. 4.2. (202.165.97.53, UDP_-_EDNS0_512_D_KN)
  • yahoo.com/SOA: No response was received from the server over TCP (tried 3 times). See RFC 1035, Sec. 4.2. (27.123.42.42, 98.138.11.157, 2406:2000:1d0::7961:686f:6f21, 2406:8600:f03f:1f8::1003, TCP_-_EDNS0_4096_D_N)
  • yahoo.com/SOA: No response was received from the server over TCP (tried 4 times). See RFC 1035, Sec. 4.2. (2001:4998:1b0::7961:686f:6f21, TCP_-_EDNS0_4096_D_N)
  • yahoo.com/DNSKEY has errors; select the "Denial of existence" DNSSEC option to see them.
Warnings (4)
  • com to yahoo.com: 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. (192.48.79.30, UDP_-_EDNS0_4096_D_KN)
  • yahoo.com/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. (202.165.97.53, UDP_-_EDNS0_4096_D_KN)
  • yahoo.com/DS has warnings; select the "Denial of existence" DNSSEC option to see them.
  • reix1wabn2.yahoo.com/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