us-cert.gov
Updated:
2023-03-21 12:00:09 UTC (615 days ago)
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Notices
DNSSEC Authentication Chain
RRset status
Secure (5)
- us-cert.gov/A
- us-cert.gov/NS
- us-cert.gov/NSEC3PARAM
- us-cert.gov/SOA
- us-cert.gov/TXT
DNSKEY/DS/NSEC status
Secure (9)
- ./DNSKEY (alg 8, id 20326)
- ./DNSKEY (alg 8, id 951)
- gov/DNSKEY (alg 8, id 24250)
- gov/DNSKEY (alg 8, id 7698)
- gov/DS (alg 8, id 7698)
- us-cert.gov/DNSKEY (alg 8, id 30121)
- us-cert.gov/DNSKEY (alg 8, id 56448)
- us-cert.gov/DS (alg 8, id 30121)
- us-cert.gov/DS (alg 8, id 30121)
Delegation status
Secure (2)
- . to gov
- gov to us-cert.gov
Notices
Errors (16)
- us-cert.gov zone: The server(s) were not responsive to queries over TCP. See RFC 1035, Sec. 4.2. (208.73.184.110)
- us-cert.gov zone: The server(s) were not responsive to queries over UDP. See RFC 1035, Sec. 4.2. (2620:112:5000:1::2)
- us-cert.gov/A: No response was received from the server over UDP (tried 12 times). See RFC 1035, Sec. 4.2. (2620:112:5000:1::2, UDP_-_NOEDNS_)
- us-cert.gov/DNSKEY: No response was received from the server over UDP (tried 12 times). See RFC 1035, Sec. 4.2. (208.73.184.110, UDP_-_NOEDNS_)
- us-cert.gov/DNSKEY: No response was received from the server over UDP (tried 4 times). See RFC 1035, Sec. 4.2. (208.73.184.110, UDP_-_EDNS0_512_D_KN)
- us-cert.gov/MX: No response was received from the server over TCP (tried 1 times). See RFC 1035, Sec. 4.2. (208.73.191.39, TCP_-_EDNS0_4096_D_KN)
- us-cert.gov/MX: No response was received from the server over UDP (tried 12 times). See RFC 1035, Sec. 4.2. (208.73.184.110, UDP_-_NOEDNS_)
- us-cert.gov/MX: No response was received from the server over UDP (tried 4 times). See RFC 1035, Sec. 4.2. (208.73.184.110, 208.73.191.39, UDP_-_EDNS0_512_D_KN)
- us-cert.gov/NS: No response was received from the server over UDP (tried 12 times). See RFC 1035, Sec. 4.2. (2620:112:5000:1::2, UDP_-_NOEDNS_)
- us-cert.gov/NSEC3PARAM: No response was received from the server over UDP (tried 12 times). See RFC 1035, Sec. 4.2. (208.73.184.110, UDP_-_NOEDNS_)
- us-cert.gov/SOA: No response was received from the server over TCP (tried 3 times). See RFC 1035, Sec. 4.2. (208.73.184.110, TCP_-_EDNS0_4096_D_N)
- us-cert.gov/SOA: No response was received from the server over UDP (tried 12 times). See RFC 1035, Sec. 4.2. (208.73.184.110, UDP_-_NOEDNS_)
- crol4g9zkx.us-cert.gov/A has errors; select the "Denial of existence" DNSSEC option to see them.
- us-cert.gov/AAAA has errors; select the "Denial of existence" DNSSEC option to see them.
- us-cert.gov/CNAME has errors; select the "Denial of existence" DNSSEC option to see them.
- us-cert.gov/DNSKEY has errors; select the "Denial of existence" DNSSEC option to see them.
Warnings (10)
- us-cert.gov/A: 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. (208.73.184.110, UDP_-_EDNS0_4096_D_KN)
- us-cert.gov/DS (alg 8, id 30121): DNSSEC implementers are prohibited from implementing signing with DS algorithm 1 (SHA-1). See RFC 8624, Sec. 3.2.
- us-cert.gov/DS (alg 8, id 30121): DNSSEC implementers are prohibited from implementing signing with DS algorithm 1 (SHA-1). See RFC 8624, Sec. 3.2.
- us-cert.gov/DS (alg 8, id 30121): 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.
- us-cert.gov/DS (alg 8, id 30121): 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.
- us-cert.gov/NS: 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. (208.73.191.39, UDP_-_EDNS0_4096_D_KN)
- us-cert.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. (208.73.184.110, UDP_-_EDNS0_4096_D_KN_0x20)
- crol4g9zkx.us-cert.gov/A has warnings; select the "Denial of existence" DNSSEC option to see them.
- us-cert.gov/AAAA has warnings; select the "Denial of existence" DNSSEC option to see them.
- us-cert.gov/CNAME has warnings; select the "Denial of existence" DNSSEC option to see them.
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