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DNSViz: A DNS visualization tool

fjext.centrica.com

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

RRset statusRRset status

Insecure (3)
  • centrica.com/SOA
  • fjext.centrica.com/SOA
  • fjext.centrica.com/SOA
Secure (2)
  • com/SOA
  • com/SOA

DNSKEY/DS/NSEC statusDNSKEY/DS/NSEC status

Secure (6)
  • ./DNSKEY (alg 8, id 20326)
  • ./DNSKEY (alg 8, id 33853)
  • NSEC3 proving non-existence of centrica.com/DS
  • com/DNSKEY (alg 8, id 30909)
  • com/DNSKEY (alg 8, id 56311)
  • com/DS (alg 8, id 30909)
Non_existent (2)
  • fjext.centrica.com/DNSKEY (alg 5, id 4278)
  • fjext.centrica.com/DNSKEY (alg 5, id 44052)

Delegation statusDelegation status

Insecure (2)
  • centrica.com to fjext.centrica.com
  • com to centrica.com
Secure (1)
  • . to com

NoticesNotices

Errors (11)
  • fjext.centrica.com zone: The server(s) were not responsive to queries over TCP. See RFC 1035, Sec. 4.2. (194.176.192.146, 194.176.192.178)
  • fjext.centrica.com/DNSKEY: The TCP connection was refused (ECONNREFUSED). See RFC 1035, Sec. 4.2. (194.176.192.146, 194.176.192.178, TCP_-_EDNS0_4096_D_K)
  • fjext.centrica.com/SOA: The TCP connection was refused (ECONNREFUSED). See RFC 1035, Sec. 4.2. (194.176.192.146, 194.176.192.178, TCP_-_EDNS0_4096_D)
  • fjext.centrica.com/NS has errors; select the "Denial of existence" DNSSEC option to see them.
  • fjext.centrica.com/DNSKEY has errors; select the "Denial of existence" DNSSEC option to see them.
  • fjext.centrica.com/A has errors; select the "Denial of existence" DNSSEC option to see them.
  • fjext.centrica.com/MX has errors; select the "Denial of existence" DNSSEC option to see them.
  • fjext.centrica.com/CNAME has errors; select the "Denial of existence" DNSSEC option to see them.
  • fjext.centrica.com/AAAA has errors; select the "Denial of existence" DNSSEC option to see them.
  • z4vf2x9n65.fjext.centrica.com/A has errors; select the "Denial of existence" DNSSEC option to see them.
  • fjext.centrica.com/TXT has errors; select the "Denial of existence" DNSSEC option to see them.
Warnings (5)
  • RRSIG fjext.centrica.com/SOA alg 5, id 4278: DNSSEC implementers are recommended against implementing signing with DNSSEC algorithm 5 (RSASHA1). See RFC 8624, Sec. 3.1.
  • RRSIG fjext.centrica.com/SOA alg 5, id 44052: DNSSEC implementers are recommended against implementing signing with DNSSEC algorithm 5 (RSASHA1). See RFC 8624, Sec. 3.1.
  • fjext.centrica.com/DNSKEY: The Authoritative Answer (AA) flag was not set in the response. See RFC 1035, Sec. 4.1.1. (194.176.192.146, 194.176.192.178, UDP_-_EDNS0_512_D_K)
  • fjext.centrica.com/DNSKEY: The server responded with no OPT record, rather than with RCODE FORMERR. See RFC 6891, Sec. 7. (194.176.192.146, 194.176.192.178, UDP_-_EDNS0_512_D_K)
  • fjext.centrica.com/DNSKEY 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