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DNSViz: A DNS visualization tool

irs.gov

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

RRset statusRRset status

Secure (7)
  • irs.gov/A
  • irs.gov/AAAA
  • irs.gov/MX
  • irs.gov/NS
  • irs.gov/NSEC3PARAM
  • irs.gov/SOA
  • irs.gov/TXT

DNSKEY/DS/NSEC statusDNSKEY/DS/NSEC status

Secure (11)
  • ./DNSKEY (alg 8, id 20326)
  • ./DNSKEY (alg 8, id 60955)
  • ./DNSKEY (alg 8, id 951)
  • gov/DNSKEY (alg 8, id 24250)
  • gov/DNSKEY (alg 8, id 7698)
  • gov/DS (alg 8, id 7698)
  • irs.gov/DNSKEY (alg 8, id 29359)
  • irs.gov/DNSKEY (alg 8, id 34821)
  • irs.gov/DNSKEY (alg 8, id 38766)
  • irs.gov/DNSKEY (alg 8, id 63805)
  • irs.gov/DS (alg 8, id 29359)

Delegation statusDelegation status

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

NoticesNotices

Errors (18)
  • gov to irs.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. (2400:cb00:2049:1::a29f:30a3, TCP_-_NOEDNS_)
  • gov to irs.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. (2400:cb00:2049:1::a29f:30a3, TCP_-_NOEDNS_)
  • irs.gov/DNSKEY (alg 8, id 29359): DNSSEC was effectively downgraded because the response had an invalid RCODE (SERVFAIL) with EDNS enabled. See RFC 6891, Sec. 7, RFC 2671, Sec. 5.3. (2400:cb00:2049:1::a29f:30a3, TCP_-_NOEDNS_)
  • irs.gov/DNSKEY (alg 8, id 29359): 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. (2400:cb00:2049:1::a29f:30a3, UDP_-_EDNS0_4096_D_KN)
  • irs.gov/DNSKEY (alg 8, id 29359): The response had an invalid RCODE (SERVFAIL) until EDNS was disabled (however, this server appeared to respond legitimately to other queries with EDNS enabled). See RFC 6891, Sec. 6.2.6. (2400:cb00:2049:1::a29f:30a3, UDP_-_EDNS0_4096_D_KN)
  • irs.gov/DNSKEY (alg 8, id 34821): DNSSEC was effectively downgraded because the response had an invalid RCODE (SERVFAIL) with EDNS enabled. See RFC 6891, Sec. 7, RFC 2671, Sec. 5.3. (2400:cb00:2049:1::a29f:30a3, TCP_-_NOEDNS_)
  • irs.gov/DNSKEY (alg 8, id 34821): 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. (2400:cb00:2049:1::a29f:30a3, UDP_-_EDNS0_4096_D_KN)
  • irs.gov/DNSKEY (alg 8, id 34821): The response had an invalid RCODE (SERVFAIL) until EDNS was disabled (however, this server appeared to respond legitimately to other queries with EDNS enabled). See RFC 6891, Sec. 6.2.6. (2400:cb00:2049:1::a29f:30a3, UDP_-_EDNS0_4096_D_KN)
  • irs.gov/DNSKEY (alg 8, id 38766): DNSSEC was effectively downgraded because the response had an invalid RCODE (SERVFAIL) with EDNS enabled. See RFC 6891, Sec. 7, RFC 2671, Sec. 5.3. (2400:cb00:2049:1::a29f:30a3, TCP_-_NOEDNS_)
  • irs.gov/DNSKEY (alg 8, id 38766): 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. (2400:cb00:2049:1::a29f:30a3, UDP_-_EDNS0_4096_D_KN)
  • irs.gov/DNSKEY (alg 8, id 38766): The response had an invalid RCODE (SERVFAIL) until EDNS was disabled (however, this server appeared to respond legitimately to other queries with EDNS enabled). See RFC 6891, Sec. 6.2.6. (2400:cb00:2049:1::a29f:30a3, UDP_-_EDNS0_4096_D_KN)
  • irs.gov/DNSKEY (alg 8, id 63805): DNSSEC was effectively downgraded because the response had an invalid RCODE (SERVFAIL) with EDNS enabled. See RFC 6891, Sec. 7, RFC 2671, Sec. 5.3. (2400:cb00:2049:1::a29f:30a3, TCP_-_NOEDNS_)
  • irs.gov/DNSKEY (alg 8, id 63805): 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. (2400:cb00:2049:1::a29f:30a3, UDP_-_EDNS0_4096_D_KN)
  • irs.gov/DNSKEY (alg 8, id 63805): The response had an invalid RCODE (SERVFAIL) until EDNS was disabled (however, this server appeared to respond legitimately to other queries with EDNS enabled). See RFC 6891, Sec. 6.2.6. (2400:cb00:2049:1::a29f:30a3, UDP_-_EDNS0_4096_D_KN)
  • irs.gov/DNSKEY: The response had an invalid RCODE (SERVFAIL). See RFC 1035, Sec. 4.1.1. (2400:cb00:2049:1::a29f:30d6, UDP_-_EDNS0_512_D_KN)
  • irs.gov/DNSKEY has errors; select the "Denial of existence" DNSSEC option to see them.
  • irs.gov/CNAME has errors; select the "Denial of existence" DNSSEC option to see them.
  • fuoi2prtq1.irs.gov/A has errors; select the "Denial of existence" DNSSEC option to see them.
Warnings (2)
  • irs.gov/CNAME has warnings; select the "Denial of existence" DNSSEC option to see them.
  • fuoi2prtq1.irs.gov/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