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DNSViz: A DNS visualization tool

epa.gov

DNSSEC options (hide)
  1. |?|
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  4. |?|
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Notices
DNSSEC Authentication Chain

RRset statusRRset status

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

DNSKEY/DS/NSEC statusDNSKEY/DS/NSEC status

Secure (11)
  • ./DNSKEY (alg 8, id 20326)
  • ./DNSKEY (alg 8, id 30903)
  • epa.gov/DNSKEY (alg 8, id 10410)
  • epa.gov/DNSKEY (alg 8, id 23626)
  • epa.gov/DNSKEY (alg 8, id 46683)
  • epa.gov/DNSKEY (alg 8, id 55458)
  • epa.gov/DNSKEY (alg 8, id 7219)
  • epa.gov/DS (alg 8, id 23626)
  • gov/DNSKEY (alg 8, id 10104)
  • gov/DNSKEY (alg 8, id 64280)
  • gov/DS (alg 8, id 64280)

Delegation statusDelegation status

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

NoticesNotices

Errors (5)
  • epa.gov/SOA: 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. (134.67.12.5, UDP_-_EDNS0_4096_)
  • epa.gov/SOA: 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. (134.67.12.5, UDP_-_EDNS0_4096_D_KN)
  • epa.gov/SOA: 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. (134.67.12.5, UDP_-_EDNS0_4096_D_KN)
  • epa.gov/CNAME has errors; select the "Denial of existence" DNSSEC option to see them.
  • 9x56ou2mzh.epa.gov/A has errors; select the "Denial of existence" DNSSEC option to see them.
Warnings (6)
  • epa.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. (2620:117:5071:d4::f00f, UDP_-_EDNS0_4096_D_KN)
  • epa.gov/SOA: 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. (161.80.212.5, UDP_-_EDNS0_4096_D_KN)
  • epa.gov/SOA: No response was received from the server over UDP (tried 7 times) until the NSID EDNS option was removed (however, this server appeared to respond legitimately to other queries with the NSID EDNS option present). See RFC 6891, Sec. 6.1.2. (134.67.12.15, 161.80.212.15, UDP_-_EDNS0_4096_D_KN, UDP_-_EDNS0_4096_D_KN_0x20)
  • epa.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. (134.67.12.15, 161.80.212.5, 161.80.212.15, UDP_-_EDNS0_4096_D_KN, UDP_-_EDNS0_4096_D_KN_0x20)
  • epa.gov/CNAME has warnings; select the "Denial of existence" DNSSEC option to see them.
  • 9x56ou2mzh.epa.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