www.edu.tw
Updated:
2024-08-10 07:47:22 UTC (482 days ago)
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Notices
DNSSEC Authentication Chain
RRset status
Insecure (4)
- www.edu.tw/A
- www.edu.tw/AAAA
- www.edu.tw/NS
- www.edu.tw/SOA
Secure (2)
- edu.tw/SOA
- edu.tw/SOA
DNSKEY/DS/NSEC status
Secure (11)
- ./DNSKEY (alg 8, id 20038)
- ./DNSKEY (alg 8, id 20326)
- NSEC3 proving non-existence of www.edu.tw/DS
- edu.tw/DNSKEY (alg 8, id 12423)
- edu.tw/DNSKEY (alg 8, id 17793)
- edu.tw/DNSKEY (alg 8, id 24025)
- edu.tw/DNSKEY (alg 8, id 34914)
- edu.tw/DS (alg 8, id 24025)
- tw/DNSKEY (alg 8, id 41124)
- tw/DNSKEY (alg 8, id 51277)
- tw/DS (alg 8, id 51277)
Delegation status
Insecure (1)
- edu.tw to www.edu.tw
Secure (2)
- . to tw
- tw to edu.tw
Notices
Errors (6)
- NSEC3 proving non-existence of www.edu.tw/DS: An iterations count of 0 must be used in NSEC3 records to alleviate computational burdens. See RFC 9276, Sec. 3.1.
- NSEC3 proving non-existence of www.edu.tw/DS: An iterations count of 0 must be used in NSEC3 records to alleviate computational burdens. See RFC 9276, Sec. 3.1.
- edu.tw zone: The server(s) were not responsive to queries over UDP. See RFC 1035, Sec. 4.2. (140.111.34.134, 2001:288:0:34::134, 2001:288:0:233::3, 2001:288:0:233::4)
- edu.tw/DNSKEY: No response was received from the server over UDP (tried 12 times). See RFC 1035, Sec. 4.2. (2001:288:0:34::133, UDP_-_NOEDNS_)
- edu.tw/DNSKEY: No response was received from the server over UDP (tried 4 times). See RFC 1035, Sec. 4.2. (2001:288:0:34::133, 2001:45b1:0:5::24, UDP_-_EDNS0_512_D_KN)
- www.edu.tw/DS has errors; select the "Denial of existence" DNSSEC option to see them.
Warnings (13)
- ./DNSKEY (alg 8, id 20038): The server appears to support DNS cookies but did not return a COOKIE option. See RFC 7873, Sec. 5.2.3. (2001:500:2f::f, UDP_-_EDNS0_4096_D_KN)
- ./DNSKEY (alg 8, id 20326): The server appears to support DNS cookies but did not return a COOKIE option. See RFC 7873, Sec. 5.2.3. (2001:500:2f::f, UDP_-_EDNS0_4096_D_KN)
- NSEC3 proving non-existence of www.edu.tw/DS: The salt value for an NSEC3 record should be empty. See RFC 9276, Sec. 3.1.
- NSEC3 proving non-existence of www.edu.tw/DS: The salt value for an NSEC3 record should be empty. See RFC 9276, Sec. 3.1.
- edu.tw/DNSKEY (alg 8, id 12423): 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. (2001:45b1:0:5::24, UDP_-_EDNS0_4096_D_KN)
- edu.tw/DNSKEY (alg 8, id 17793): 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. (2001:45b1:0:5::24, UDP_-_EDNS0_4096_D_KN)
- edu.tw/DNSKEY (alg 8, id 24025): 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. (2001:45b1:0:5::24, UDP_-_EDNS0_4096_D_KN)
- edu.tw/DNSKEY (alg 8, id 34914): 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. (2001:45b1:0:5::24, UDP_-_EDNS0_4096_D_KN)
- edu.tw/DS (alg 8, id 24025): 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. (2001:45b1:0:5::25, UDP_-_EDNS0_4096_D_KN)
- edu.tw/DS (alg 8, id 24025): 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. (2001:45b1:0:5::25, UDP_-_EDNS0_4096_D_KN)
- tw/DS (alg 8, id 51277): The server appears to support DNS cookies but did not return a COOKIE option. See RFC 7873, Sec. 5.2.3. (2001:500:2f::f, UDP_-_EDNS0_4096_D_KN)
- tw/DS (alg 8, id 51277): The server appears to support DNS cookies but did not return a COOKIE option. See RFC 7873, Sec. 5.2.3. (2001:500:2f::f, UDP_-_EDNS0_4096_D_KN)
- www.edu.tw/DS has warnings; select the "Denial of existence" DNSSEC option to see them.
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