www.edu.tw

Updated: 2025-03-07 06:50:16 UTC (about a month ago) Update now

DNSSEC options (hide)

|?| RR types:
|?| DNSSEC algorithms:
|?| DS digest algorithms:
|?| Denial of existence:
|?| Redundant edges:
|?| Ignore RFC 8624:
|?| Ignore RFC 9276:
|?| Multi-signer:
|?| Trust anchors:
- Root zone KSK
|?| Additional trusted keys:

Notices

DNSSEC Authentication Chain

RRset status

Secure (2)

www.edu.tw/CNAME
wwwedutw.tanetcdn.edu.tw/A

DNSKEY/DS/NSEC status

Secure (15)

./DNSKEY (alg 8, id 20326)
./DNSKEY (alg 8, id 26470)
./DNSKEY (alg 8, id 38696)
edu.tw/DNSKEY (alg 8, id 19894)
edu.tw/DNSKEY (alg 8, id 23191)
edu.tw/DNSKEY (alg 8, id 24025)
edu.tw/DNSKEY (alg 8, id 30259)
edu.tw/DNSKEY (alg 8, id 65011)
edu.tw/DS (alg 8, id 19894)
edu.tw/DS (alg 8, id 24025)
tanetcdn.edu.tw/DNSKEY (alg 13, id 22277)
tanetcdn.edu.tw/DS (alg 13, id 22277)
tw/DNSKEY (alg 8, id 51277)
tw/DNSKEY (alg 8, id 64905)
tw/DS (alg 8, id 51277)

Delegation status

Secure (3)

. to tw
edu.tw to tanetcdn.edu.tw
tw to edu.tw

Notices

Errors (8)

edu.tw zone: The server(s) were not responsive to queries over UDP. See RFC 1035, Sec. 4.2. (2001:288:0:233::3, 2001:288:0:233::4, 2001:c08:175:128::175:128)
tanetcdn.edu.tw/DS (alg 13, id 22277): DNSSEC was effectively downgraded because no response was received from the server over UDP (tried 11 times) with EDNS enabled. See RFC 6891, Sec. 7, RFC 2671, Sec. 5.3. (60.199.165.187, UDP_-_NOEDNS_)
tanetcdn.edu.tw/DS (alg 13, id 22277): DNSSEC was effectively downgraded because no response was received from the server over UDP (tried 11 times) with EDNS enabled. See RFC 6891, Sec. 7, RFC 2671, Sec. 5.3. (60.199.165.187, UDP_-_NOEDNS_)
tanetcdn.edu.tw/DS (alg 13, id 22277): No response was received from the server over UDP (tried 11 times) until EDNS was disabled (however, this server appeared to respond legitimately to other queries with EDNS enabled). See RFC 6891, Sec. 6.2.6. (60.199.165.187, UDP_-_EDNS0_4096_D_KN)
tanetcdn.edu.tw/DS (alg 13, id 22277): No response was received from the server over UDP (tried 11 times) until EDNS was disabled (however, this server appeared to respond legitimately to other queries with EDNS enabled). See RFC 6891, Sec. 6.2.6. (60.199.165.187, UDP_-_EDNS0_4096_D_KN)
tanetcdn.edu.tw/DS (alg 13, id 22277): 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. (60.199.165.187, UDP_-_EDNS0_4096_D_KN)
tanetcdn.edu.tw/DS (alg 13, id 22277): 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. (60.199.165.187, UDP_-_EDNS0_4096_D_KN)
edu.tw/CNAME has errors; select the "Denial of existence" DNSSEC option to see them.

Warnings (17)

. to tw: The glue address(es) for f.dns.tw (182.173.0.10) differed from its authoritative address(es) (40.65.125.222). See RFC 1034, Sec. 4.2.2.
edu.tw to tanetcdn.edu.tw: AAAA glue records exist for cdn-niu-cdrs01.tanetcdn.edu.tw, but there are no corresponding authoritative AAAA records. See RFC 1034, Sec. 4.2.2.
edu.tw to tanetcdn.edu.tw: AAAA glue records exist for cdn-niu-cdrs02.tanetcdn.edu.tw, but there are no corresponding authoritative AAAA records. See RFC 1034, Sec. 4.2.2.
edu.tw to tanetcdn.edu.tw: AAAA glue records exist for cdn-niu-cdrs03.tanetcdn.edu.tw, but there are no corresponding authoritative AAAA records. See RFC 1034, Sec. 4.2.2.
edu.tw to tanetcdn.edu.tw: AAAA glue records exist for cdn-niu-cdrs04.tanetcdn.edu.tw, but there are no corresponding authoritative AAAA records. See RFC 1034, Sec. 4.2.2.
edu.tw to tanetcdn.edu.tw: AAAA glue records exist for cdn-nsysu-cdrs01.tanetcdn.edu.tw, but there are no corresponding authoritative AAAA records. See RFC 1034, Sec. 4.2.2.
edu.tw to tanetcdn.edu.tw: AAAA glue records exist for cdn-nsysu-cdrs02.tanetcdn.edu.tw, but there are no corresponding authoritative AAAA records. See RFC 1034, Sec. 4.2.2.
edu.tw to tanetcdn.edu.tw: AAAA glue records exist for cdn-nsysu-cdrs03.tanetcdn.edu.tw, but there are no corresponding authoritative AAAA records. See RFC 1034, Sec. 4.2.2.
edu.tw to tanetcdn.edu.tw: AAAA glue records exist for cdn-nsysu-cdrs04.tanetcdn.edu.tw, but there are no corresponding authoritative AAAA records. See RFC 1034, Sec. 4.2.2.
tanetcdn.edu.tw/DS (alg 13, id 22277): 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. (2001:4541:9010:7::186, UDP_-_EDNS0_4096_D_KN)
tanetcdn.edu.tw/DS (alg 13, id 22277): 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. (2001:4541:9010:7::186, UDP_-_EDNS0_4096_D_KN)
tanetcdn.edu.tw/DS (alg 13, id 22277): 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. (60.199.165.186, UDP_-_EDNS0_4096_D_KN)
tanetcdn.edu.tw/DS (alg 13, id 22277): 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. (60.199.165.186, UDP_-_EDNS0_4096_D_KN)
www.edu.tw/CNAME: 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. (60.199.165.187, UDP_-_EDNS0_4096_D_KN)
www.edu.tw/CNAME: 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. (60.199.165.186, UDP_-_EDNS0_4096_D_KN)
www.edu.tw/AAAA has warnings; select the "Denial of existence" DNSSEC option to see them.
edu.tw/CNAME has warnings; select the "Denial of existence" DNSSEC option to see them.