facebook.com
Updated:
2021-10-04 21:23:08 UTC (1082 days ago)
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Notices
DNSSEC Authentication Chain
RRset status
Insecure (7)
- facebook.com/A
- facebook.com/AAAA
- facebook.com/MX
- facebook.com/NS
- facebook.com/SOA
- facebook.com/SOA
- facebook.com/TXT
Secure (2)
- com/SOA
- com/SOA
DNSKEY/DS/NSEC status
Secure (7)
- ./DNSKEY (alg 8, id 14748)
- ./DNSKEY (alg 8, id 20326)
- ./DNSKEY (alg 8, id 26838)
- NSEC3 proving non-existence of facebook.com/DS
- com/DNSKEY (alg 8, id 30909)
- com/DNSKEY (alg 8, id 39343)
- com/DS (alg 8, id 30909)
Delegation status
Insecure (1)
- com to facebook.com
Secure (1)
- . to com
Notices
Errors (3)
- facebook.com/DNSKEY: No response was received from the server over UDP (tried 4 times). See RFC 1035, Sec. 4.2. (185.89.218.12, 185.89.219.12, UDP_-_EDNS0_512_D_KN)
- facebook.com/MX: No response was received from the server over UDP (tried 4 times). See RFC 1035, Sec. 4.2. (129.134.31.12, UDP_-_EDNS0_512_D_KN)
- facebook.com/DNSKEY has errors; select the "Denial of existence" DNSSEC option to see them.
Warnings (8)
- com/DS (alg 8, id 30909): The server appears to support DNS cookies but did not return a COOKIE option. See RFC 7873, Sec. 5.2.3. (193.0.14.129, UDP_-_EDNS0_4096_D_KN)
- com/DS (alg 8, id 30909): The server appears to support DNS cookies but did not return a COOKIE option. See RFC 7873, Sec. 5.2.3. (193.0.14.129, UDP_-_EDNS0_4096_D_KN)
- facebook.com/AAAA: 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. (185.89.218.12, UDP_-_EDNS0_4096_D_KN)
- facebook.com/AAAA: 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. (185.89.219.12, UDP_-_EDNS0_4096_D_KN)
- facebook.com/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. (129.134.31.12, 185.89.218.12, UDP_-_EDNS0_4096_D_KN, UDP_-_EDNS0_4096_D_KN_0x20)
- facebook.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. (185.89.219.12, UDP_-_EDNS0_4096_D_KN, UDP_-_EDNS0_4096_D_KN_0x20)
- facebook.com/DNSKEY has warnings; select the "Denial of existence" DNSSEC option to see them.
- z7lr8hwfs0.facebook.com/A has warnings; select the "Denial of existence" DNSSEC option to see them.
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