Check DNS, Urls + Redirects, Certificates and Content of your Website

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Shortcuts: 1. IP-Addresses | 2. DNSSEC | 3. Name Servers | 4. SOA-Entries | 5. Screenshots | 6. Url-Checks | 7. Comments | 8. Connections | 9. Certificates | 10. CT-Logs | 11. Html-Content | 12. Html-Parsing | 13. NameServer-IPAddresses | 14. CAA | 15. TXT | 16. DomainServiceEntries | 17. Cipher Suites | 18. Portchecks |

 

X

 

DNS-problem - authoritative Nameserver refused, not defined or timeout

 

Checked:
18.08.2020 10:00:00

 

Older results

 

B - 13.04.2020 09:55:42
B - 14.02.2020 07:46:53
B - 26.11.2019 13:56:00
N - 25.04.2019 10:12:21
N - 24.04.2019 09:15:00
N - 24.04.2019 08:39:31
N - 24.04.2019 04:33:46
N - 22.04.2019 19:08:46

 

1. IP-Addresses

HostTypeIP-Addressis auth.∑ Queries∑ Timeout
pl.csie.ntut.edu.tw
A
140.124.181.82
Taipei/Taiwan/Taiwan (TW) - T-NTUT.EDU.TW
No Hostname found
yes
1
0

AAAA

yes


www.pl.csie.ntut.edu.tw

Name Error
yes
1
0

 

2. DNSSEC

Zone (*)DNSSEC - Informations


Zone: (root)

(root)
1 DS RR published






DS with Algorithm 8, KeyTag 20326, DigestType 2 and Digest 4G1EuAuPHTmpXAsNfGXQhFjogECbvGg0VxBCN8f47I0=






• Status: Valid because published






2 DNSKEY RR found






Public Key with Algorithm 8, KeyTag 20326, Flags 257 (SEP = Secure Entry Point)






Public Key with Algorithm 8, KeyTag 46594, Flags 256






1 RRSIG RR to validate DNSKEY RR found






RRSIG-Owner (root), Algorithm: 8, 0 Labels, original TTL: 172800 sec, Signature-expiration: 31.08.2020, 00:00:00 +, Signature-Inception: 10.08.2020, 00:00:00 +, KeyTag 20326, Signer-Name: (root)






• Status: Good - Algorithmus 8 and DNSKEY with KeyTag 20326 used to validate the DNSKEY RRSet






• Status: Valid Chain of trust. Parent-DS with Algorithm 8, KeyTag 20326, DigestType 2 and Digest "4G1EuAuPHTmpXAsNfGXQhFjogECbvGg0VxBCN8f47I0=" validates local Key with the same values, Key ist Secure Entry Point (SEP) of the zone



Zone: tw

tw
1 DS RR in the parent zone found






DS with Algorithm 8, KeyTag 40792, DigestType 2 and Digest oF20sN65cQMTYbtiHouxuNc0ZmWj0bBuwUMa230BXuk=






1 RRSIG RR to validate DS RR found






RRSIG-Owner tw., Algorithm: 8, 1 Labels, original TTL: 86400 sec, Signature-expiration: 31.08.2020, 05:00:00 +, Signature-Inception: 18.08.2020, 04:00:00 +, KeyTag 46594, Signer-Name: (root)






• Status: Good - Algorithmus 8 and DNSKEY with KeyTag 46594 used to validate the DS RRSet in the parent zone






2 DNSKEY RR found






Public Key with Algorithm 8, KeyTag 40792, Flags 257 (SEP = Secure Entry Point)






Public Key with Algorithm 8, KeyTag 50676, Flags 256






2 RRSIG RR to validate DNSKEY RR found






RRSIG-Owner tw., Algorithm: 8, 1 Labels, original TTL: 900 sec, Signature-expiration: 16.09.2020, 20:01:37 +, Signature-Inception: 17.08.2020, 20:01:37 +, KeyTag 40792, Signer-Name: tw






RRSIG-Owner tw., Algorithm: 8, 1 Labels, original TTL: 900 sec, Signature-expiration: 16.09.2020, 20:01:37 +, Signature-Inception: 17.08.2020, 20:01:37 +, KeyTag 50676, Signer-Name: tw






• Status: Good - Algorithmus 8 and DNSKEY with KeyTag 40792 used to validate the DNSKEY RRSet






• Status: Good - Algorithmus 8 and DNSKEY with KeyTag 50676 used to validate the DNSKEY RRSet






• Status: Valid Chain of trust. Parent-DS with Algorithm 8, KeyTag 40792, DigestType 2 and Digest "oF20sN65cQMTYbtiHouxuNc0ZmWj0bBuwUMa230BXuk=" validates local Key with the same values, Key ist Secure Entry Point (SEP) of the zone



Zone: edu.tw

edu.tw
2 DS RR in the parent zone found






DS with Algorithm 8, KeyTag 32734, DigestType 2 and Digest NTNW9HNMy6cVf9QLS+G/Z1bA56cBtrDQC0yqul8lLds=






DS with Algorithm 8, KeyTag 33619, DigestType 2 and Digest vzwxxDqUojkx/p+ugMp+MTDLgOwN5qCTn20yGDArVOU=






1 RRSIG RR to validate DS RR found






RRSIG-Owner edu.tw., Algorithm: 8, 2 Labels, original TTL: 300 sec, Signature-expiration: 16.09.2020, 20:01:37 +, Signature-Inception: 17.08.2020, 20:01:37 +, KeyTag 50676, Signer-Name: tw






• Status: Good - Algorithmus 8 and DNSKEY with KeyTag 50676 used to validate the DS RRSet in the parent zone






4 DNSKEY RR found






Public Key with Algorithm 8, KeyTag 6009, Flags 256






Public Key with Algorithm 8, KeyTag 32734, Flags 257 (SEP = Secure Entry Point)






Public Key with Algorithm 8, KeyTag 33619, Flags 257 (SEP = Secure Entry Point)






Public Key with Algorithm 8, KeyTag 51693, Flags 256






3 RRSIG RR to validate DNSKEY RR found






RRSIG-Owner edu.tw., Algorithm: 8, 2 Labels, original TTL: 172800 sec, Signature-expiration: 21.08.2020, 05:36:28 +, Signature-Inception: 17.08.2020, 05:03:46 +, KeyTag 6009, Signer-Name: edu.tw






RRSIG-Owner edu.tw., Algorithm: 8, 2 Labels, original TTL: 172800 sec, Signature-expiration: 21.08.2020, 05:36:28 +, Signature-Inception: 17.08.2020, 05:03:46 +, KeyTag 32734, Signer-Name: edu.tw






RRSIG-Owner edu.tw., Algorithm: 8, 2 Labels, original TTL: 172800 sec, Signature-expiration: 21.08.2020, 05:36:28 +, Signature-Inception: 17.08.2020, 05:03:46 +, KeyTag 33619, Signer-Name: edu.tw






• Status: Good - Algorithmus 8 and DNSKEY with KeyTag 6009 used to validate the DNSKEY RRSet






• Status: Good - Algorithmus 8 and DNSKEY with KeyTag 32734 used to validate the DNSKEY RRSet






• Status: Good - Algorithmus 8 and DNSKEY with KeyTag 33619 used to validate the DNSKEY RRSet






• Status: Valid Chain of trust. Parent-DS with Algorithm 8, KeyTag 32734, DigestType 2 and Digest "NTNW9HNMy6cVf9QLS+G/Z1bA56cBtrDQC0yqul8lLds=" validates local Key with the same values, Key ist Secure Entry Point (SEP) of the zone






• Status: Valid Chain of trust. Parent-DS with Algorithm 8, KeyTag 33619, DigestType 2 and Digest "vzwxxDqUojkx/p+ugMp+MTDLgOwN5qCTn20yGDArVOU=" validates local Key with the same values, Key ist Secure Entry Point (SEP) of the zone



Zone: ntut.edu.tw

ntut.edu.tw
0 DS RR in the parent zone found






DS-Query in the parent zone has a valid NSEC3 RR as result with the hashed query name "p7pj3vn6jfv2lkjout6ose4hvj8vc6rq" between the hashed NSEC3-owner "p7pj3vn6jfv2lkjout6ose4hvj8vc6rq" and the hashed NextOwner "p7vjmbp1sotb30poqqrannbiaqsglp5v". So the parent zone confirmes the not-existence of a DS RR.
Bitmap: No Bitmap? Validated: RRSIG-Owner p7pj3vn6jfv2lkjout6ose4hvj8vc6rq.edu.tw., Algorithm: 8, 3 Labels, original TTL: 300 sec, Signature-expiration: 21.08.2020, 20:07:54 +, Signature-Inception: 17.08.2020, 19:24:37 +, KeyTag 6009, Signer-Name: edu.tw






0 DNSKEY RR found









Zone: csie.ntut.edu.tw

csie.ntut.edu.tw
0 DS RR in the parent zone found






0 DNSKEY RR found









Zone: pl.csie.ntut.edu.tw

pl.csie.ntut.edu.tw
0 DS RR in the parent zone found






0 DNSKEY RR found









Zone: www.pl.csie.ntut.edu.tw

www.pl.csie.ntut.edu.tw
0 DS RR in the parent zone found

 

3. Name Servers

DomainNameserverNS-IP
www.pl.csie.ntut.edu.tw
•  csie.ntut.edu.tw

pl.csie.ntut.edu.tw
•  csie.ntut.edu.tw
140.124.180.1
Taipei/Taiwan/Taiwan (TW) - T-NTUT.EDU.TW
csie.ntut.edu.tw
•  csie.ntut.edu.tw

ntut.edu.tw
•  galaxy.cc.ntut.edu.tw
140.124.13.1
Taipei/Taiwan/Taiwan (TW) - T-NTUT.EDU.TW		•

•  nsbackup.ntut.edu.tw
60.250.162.30
Taipei/Taipei City/Taiwan (TW) - Chunghwa Telecom Co., Ltd.

•  sun.cc.ntut.edu.tw
140.124.13.2
Taipei/Taiwan/Taiwan (TW) - T-NTUT.EDU.TW		•
edu.tw
T  a.twnic.net.tw
130.211.241.105
Taipei/Taiwan/Taiwan (TW) - Google LLC		•

• 
211.73.64.22
Fenjihu/Taiwan/Taiwan (TW) - NBEN		•

•  b.twnic.net.tw
103.235.88.1
Taipei/Taiwan/Taiwan (TW) - TWNIC		•

• 
203.73.24.24
Taipei/Taiwan/Taiwan (TW) - Digital United Inc.		•

•  c.twnic.net.tw
168.95.192.10
Taipei/Taiwan/Taiwan (TW) - Chunghwa Telecom Co.		•

•  d.twnic.net.tw
202.169.175.130
Fenjihu/Taiwan/Taiwan (TW) - Academia Sinica Computing Center		•

• 
60.199.165.187
Taipei/Taiwan/Taiwan (TW) - Taiwan Fixed Network		•

• 
2001:4541:9010:7::187
Xiatayou/Taiwan/Taiwan (TW) - Taiwan Fixed Network Co., Ltd		•

• 
2001:c08:175:128::175:128
Nangangzi/Taiwan/Taiwan (TW) - Academia Sinica Computing Center		•

•  edudns-m1.edu.tw


•  moemoon.edu.tw
192.83.166.17
Fenjihu/Taiwan/Taiwan (TW) - Taiwan Academic Network (TANet) Information Center		•

• 
2001:288:1:1002::a611
Xianeibu/Taiwan/Taiwan (TW) - T-MOE.GOV.TW		•

•  moestar.edu.tw
163.28.6.21
Taipei/Taiwan/Taiwan (TW) - T-EDU.TW		•
tw
•  a.dns.tw
•

•  anytld.apnic.net / ns4-de1.apnic.net
•

•  b.dns.tw
•

•  c.dns.tw
•

•  d.dns.tw
•

•  e.dns.tw
•

•  f.dns.tw
•

•  g.dns.tw
•

•  h.dns.tw / 1.ber.pch
•

•  ns.twnic.net
•

 

4. SOA-Entries


Domain:tw
Zone-Name:tw
Primary:a.dns.tw
Mail:snw.twnic.net.tw
Serial:2009795055
Refresh:3600
Retry:900
Expire:1296000
TTL:900
num Entries:10


Domain:edu.tw
Zone-Name:
Primary:
Mail:
Serial:
Refresh:
Retry:
Expire:
TTL:
num Entries:2


Domain:edu.tw
Zone-Name:edu.tw
Primary:edudns-m1.edu.tw
Mail:abuse.moe.edu.tw
Serial:2013209394
Refresh:14400
Retry:1440
Expire:3600000
TTL:300
num Entries:11


Domain:ntut.edu.tw
Zone-Name:ntut.edu.tw
Primary:galaxy.cc.ntut.edu.tw
Mail:network.ntut.edu.tw
Serial:2018121636
Refresh:10800
Retry:3600
Expire:2419200
TTL:900
num Entries:3


Domain:csie.ntut.edu.tw
Zone-Name:
Primary:
Mail:
Serial:
Refresh:
Retry:
Expire:
TTL:
num Entries:1


Domain:pl.csie.ntut.edu.tw
Zone-Name:csie.ntut.edu.tw
Primary:csie.ntut.edu.tw
Mail:root.csie.ntut.edu.tw
Serial:2020061001
Refresh:86400
Retry:1800
Expire:1728000
TTL:259200
num Entries:1


Domain:www.pl.csie.ntut.edu.tw
Zone-Name:
Primary:
Mail:
Serial:
Refresh:
Retry:
Expire:
TTL:
num Entries:1


5. Screenshots

Startaddress: https://pl.csie.ntut.edu.tw, address used: https://pl.csie.ntut.edu.tw/, Screenshot created 2020-08-18 10:16:06 +00:0

 

Mobil (412px x 732px)

 

520 milliseconds

 

Screenshot mobile - https://pl.csie.ntut.edu.tw/
Mobil + Landscape (732px x 412px)

 

550 milliseconds

 

Screenshot mobile landscape - https://pl.csie.ntut.edu.tw/
Screen (1280px x 1680px)

 

3021 milliseconds

 

Screenshot Desktop - https://pl.csie.ntut.edu.tw/

 

Mobile- and other Chrome-Checks


widthheight
visual Viewport412732
content Size412732

 

Good: No horizontal scrollbar. Content-size width = visual Viewport width.

 

Chrome-Connection: secure. secure connection settings. The connection to this site is encrypted and authenticated using TLS 1.2, ECDHE_RSA with X25519, and AES_128_GCM.

 

Chrome-Resources : secure. all served securely. All resources on this page are served securely.

 

 

6. Url-Checks


:

:
DomainnameHttp-StatusredirectSec.G
• http://pl.csie.ntut.edu.tw/
140.124.181.82
301
https://pl.csie.ntut.edu.tw/
Html is minified: 100.00 %
0.530
A
Date: Tue, 18 Aug 2020 08:15:32 GMT
Server: Apache/2.4.29 (Ubuntu)
Location: https://pl.csie.ntut.edu.tw/
Content-Length: 321
Connection: close
Content-Type: text/html; charset=iso-8859-1

• https://pl.csie.ntut.edu.tw/
140.124.181.82
Inline-JavaScript (∑/total): 0/0 Inline-CSS (∑/total): 0/0		200

Html is minified: 152.42 %
Other inline scripts (∑/total): 0/0		5.703
B
small visible content (num chars: 0)
Date: Tue, 18 Aug 2020 08:15:33 GMT
Server: Apache/2.4.29 (Ubuntu)
Last-Modified: Tue, 19 Sep 2017 05:47:08 GMT
ETag: "411-5598463d49ddb-gzip"
Accept-Ranges: bytes
Vary: Accept-Encoding
Content-Encoding: gzip
Content-Length: 515
Connection: close
Content-Type: text/html

• http://pl.csie.ntut.edu.tw/.well-known/acme-challenge/check-your-website-dot-server-daten-dot-de
140.124.181.82
Inline-JavaScript (∑/total): 0/0 Inline-CSS (∑/total): 0/0		301
https://pl.csie.ntut.edu.tw/.well-known/acme-challenge/check-your-website-dot-server-daten-dot-de
Html is minified: 100.00 %
Other inline scripts (∑/total): 0/0		0.534
A
Visible Content: Moved Permanently The document has moved here . Apache/2.4.29 (Ubuntu) Server at pl.csie.ntut.edu.tw Port 80
Date: Tue, 18 Aug 2020 08:15:39 GMT
Server: Apache/2.4.29 (Ubuntu)
Location: https://pl.csie.ntut.edu.tw/.well-known/acme-challenge/check-your-website-dot-server-daten-dot-de
Content-Length: 390
Connection: close
Content-Type: text/html; charset=iso-8859-1

• https://pl.csie.ntut.edu.tw/.well-known/acme-challenge/check-your-website-dot-server-daten-dot-de

Inline-JavaScript (∑/total): 0/0 Inline-CSS (∑/total): 0/0		404

Html is minified: 100.00 %
Other inline scripts (∑/total): 0/0		4.930
A
Not Found
Visible Content: Not Found The requested URL was not found on this server. Apache/2.4.29 (Ubuntu) Server at pl.csie.ntut.edu.tw Port 443
Date: Tue, 18 Aug 2020 08:15:46 GMT
Server: Apache/2.4.29 (Ubuntu)
Content-Length: 282
Connection: close
Content-Type: text/html; charset=iso-8859-1

• https://140.124.181.82/
140.124.181.82
Inline-JavaScript (∑/total): 0/0 Inline-CSS (∑/total): 0/0		200

Html is minified: 152.42 %
Other inline scripts (∑/total): 0/0		5.427
N
Certificate error: RemoteCertificateNameMismatch
small visible content (num chars: 0)
Date: Tue, 18 Aug 2020 08:15:40 GMT
Server: Apache/2.4.29 (Ubuntu)
Last-Modified: Tue, 19 Sep 2017 05:47:08 GMT
ETag: "411-5598463d49ddb-gzip"
Accept-Ranges: bytes
Vary: Accept-Encoding
Content-Encoding: gzip
Content-Length: 515
Connection: close
Content-Type: text/html

 

7. Comments


1. General Results, most used to calculate the result

Aname "pl.csie.ntut.edu.tw" is subdomain, public suffix is ".edu.tw", top-level-domain is ".tw", top-level-domain-type is "country-code", Country is Taiwan (Province of China), tld-manager is "Taiwan Network Information Center (TWNIC)", num .tw-domains preloaded: 162 (complete: 129392)
AGood: All ip addresses are public addresses
Warning: Only one ip address found: pl.csie.ntut.edu.tw has only one ip address.
Warning: No ipv6 address found. Ipv6 is the future with a lot of new features. So every domain name should have an ipv6 address. See https://en.wikipedia.org/wiki/IPv6: pl.csie.ntut.edu.tw has no ipv6 address.
AGood: No asked Authoritative Name Server had a timeout
ADNS: "Name Error" means: No www-dns-entry defined. This isn't a problem
AGood: destination is https
AGood - only one version with Http-Status 200
AGood: one preferred version: non-www is preferred
AGood: No cookie sent via http.
HSTS-Preload-Status: unknown. Domain never included in the Preload-list. Check https://hstspreload.org/ to learn some basics about the Google-Preload-List.
AGood: Some urls with http status 200/404 have a complete Content-Type header (MediaType / MediaSubType + correct charset):1 complete Content-Type - header (3 urls)
https://pl.csie.ntut.edu.tw/ 140.124.181.82


Url with incomplete Content-Type - header - missing charset
https://140.124.181.82/ 140.124.181.82


Url with incomplete Content-Type - header - missing charset
Ahttp://pl.csie.ntut.edu.tw/ 140.124.181.82
301
https://pl.csie.ntut.edu.tw/
Correct redirect http - https with the same domain name
Bhttps://pl.csie.ntut.edu.tw/ 140.124.181.82
200

Missing HSTS-Header
Bhttps://pl.csie.ntut.edu.tw/.well-known/acme-challenge/check-your-website-dot-server-daten-dot-de
404

Missing HSTS-Header
Nhttps://140.124.181.82/ 140.124.181.82
200

Error - Certificate isn't trusted, RemoteCertificateNameMismatch
XFatal error: Nameserver doesn't support TCP connection: csie.ntut.edu.tw / 140.124.180.1: Timeout
XFatal error: Nameserver doesn't support TCP connection: nsbackup.ntut.edu.tw / 60.250.162.30: Timeout
Info: Checking all ip addresses of that domain without sending the hostname only one certificate found. Checking all ip addresses and sending the hostname only one certificate found. Both certificates are the same. So that domain doesn't require Server Name Indication (SNI), it's the primary certificate of that set of ip addresses.: Domain pl.csie.ntut.edu.tw, 1 ip addresses, 1 different http results.

2. Header-Checks


3. DNS- and NameServer - Checks

A
A
AInfo:: 1 different Name Servers found: csie.ntut.edu.tw, 1 Name Servers included in Delegation: csie.ntut.edu.tw, 0 Name Servers included in 1 Zone definitions: , 0 Name Servers listed in SOA.Primary: .
AGood: All Name Server Domain Names have a Public Suffix.
Warning: All Name Servers have the same domain name. If there is a problem with that domain name (or with the name servers of that domain name), your domain may be affected. Better: Use Name Servers with different domain names / different top level domains.: Only one domain name used: ntut.edu.tw
A
AGood: Nameserver supports Echo Capitalization: 1 good Nameserver
XNameserver Timeout checking Echo Capitalization: a.twnic.net.tw / 130.211.241.105
AGood: Nameserver supports EDNS with max. 512 Byte Udp payload, message is smaller: 1 good Nameserver
XNameserver Timeout checking EDNS512: a.twnic.net.tw / 130.211.241.105
AGood: Nameserver has passed 10 EDNS-Checks (OP100, FLAGS, V1, V1OP100, V1FLAGS, DNSSEC, V1DNSSEC, NSID, COOKIE, CLIENTSUBNET): 1 good Nameserver
Nameserver doesn't pass all EDNS-Checks: a.twnic.net.tw / 130.211.241.105: OP100: fatal timeout. FLAGS: fatal timeout. V1: fatal timeout. V1OP100: fatal timeout. V1FLAGS: fatal timeout. DNSSEC: fatal timeout. V1DNSSEC: fatal timeout. NSID: fatal timeout. COOKIE: fatal timeout. CLIENTSUBNET: fatal timeout.
Nameserver doesn't pass all EDNS-Checks: anytld.apnic.net: OP100: ok. FLAGS: ok. V1: ok. V1OP100: ok. V1FLAGS: ok. DNSSEC: ok. V1DNSSEC: ok. NSID: ok (ns4-de1.apnic.net). COOKIE: SOA expected, but NOT found, NOERR expected, BADVER found, Version 0 expectend and found. CLIENTSUBNET: ok.
Nameserver doesn't pass all EDNS-Checks: csie.ntut.edu.tw: OP100: no result. FLAGS: no result. V1: no result. V1OP100: no result. V1FLAGS: no result. DNSSEC: no result. V1DNSSEC: no result. NSID: no result. COOKIE: no result. CLIENTSUBNET: no result.
Nameserver doesn't pass all EDNS-Checks: csie.ntut.edu.tw: OP100: no result. FLAGS: no result. V1: no result. V1OP100: no result. V1FLAGS: no result. DNSSEC: no result. V1DNSSEC: no result. NSID: no result. COOKIE: no result. CLIENTSUBNET: no result.
Nameserver doesn't pass all EDNS-Checks: edudns-m1.edu.tw: OP100: no result. FLAGS: no result. V1: no result. V1OP100: no result. V1FLAGS: no result. DNSSEC: no result. V1DNSSEC: no result. NSID: no result. COOKIE: no result. CLIENTSUBNET: no result.
AGood: All SOA have the same Serial Number
Warning: No CAA entry with issue/issuewild found, every CAA can create a certificate. Read https://en.wikipedia.org/wiki/DNS_Certification_Authority_Authorization to learn some basics about the idea of CAA. Your name server must support such an entry. Not all dns providers support CAA entries.

4. Content- and Performance-critical Checks

AGood: All checks /.well-known/acme-challenge/random-filename without redirects answer with the expected http status 404 - Not Found. Creating a Letsencrypt certificate via http-01 challenge should work. If it doesn't work: Check your vHost configuration (apachectl -S, httpd -S, nginx -T). Every combination of port and ServerName / ServerAlias (Apache) or Server (Nginx) must be unique. Merge duplicated entries in one vHost. If you use an IIS, extensionless files must be allowed in the /.well-known/acme-challenge subdirectory. Create a web.config in that directory. Content: <configuration><system.webServer><staticContent><mimeMap fileExtension="." mimeType="text/plain" /></staticContent></system.webServer></configuration>. If you have a redirect http ⇒ https, that's ok, Letsencrypt follows such redirects to port 80 / 443 (same or other server). There must be a certificate. But the certificate may be expired, self signed or with a not matching domain name. Checking the validation file Letsencrypt ignores such certificate errors. Trouble creating a certificate? Use https://community.letsencrypt.org/ to ask.
AGood: Every https result with status 200 and greater 1024 Bytes is compressed (gzip, deflate, br checked).
AGood: No https + http status 200 with inline CSS / JavaScript found
https://pl.csie.ntut.edu.tw/ 140.124.181.82
200

Warning: Https result with status 200 found, Html-Content is too big. Should be max. 110 %. May contain inline CSS / JavaScript, too much comments or white space. Re-used ressources - create files with a long Cache-Control max-age header. Remove comments and white space.
https://140.124.181.82/ 140.124.181.82
200

Warning: Https result with status 200 found, Html-Content is too big. Should be max. 110 %. May contain inline CSS / JavaScript, too much comments or white space. Re-used ressources - create files with a long Cache-Control max-age header. Remove comments and white space.
https://pl.csie.ntut.edu.tw/ 140.124.181.82
200

Warning: Https connections (Standard Port 443) found without support of the http/2 protocol via ALPN. Http/2 is the new Http-Version (old: http 1.1) with some important new features. Update your server software so http/2 is available. Only one TCP-connection per Server (that's a performance boost), Header-Compression and Server Pushs are available. Domain Sharding and Inline-CSS/Javascript shouldn't used with http/2.
https://140.124.181.82/ 140.124.181.82
200

Warning: Https connections (Standard Port 443) found without support of the http/2 protocol via ALPN. Http/2 is the new Http-Version (old: http 1.1) with some important new features. Update your server software so http/2 is available. Only one TCP-connection per Server (that's a performance boost), Header-Compression and Server Pushs are available. Domain Sharding and Inline-CSS/Javascript shouldn't used with http/2.
AGood: All checked attribute values are enclosed in quotation marks (" or ').
AInfo: No img element found, no alt attribute checked
AGood: Domainname is not on the "Specially Designated Nationals And Blocked Persons List" (SDN). That's an US-list of individuals and companies owned or controlled by, or acting for or on behalf of, targeted countries. It also lists individuals, groups, and entities, such as terrorists and narcotics traffickers designated under programs that are not country-specific. Collectively, such individuals and companies are called "Specially Designated Nationals" or "SDNs." Their assets are blocked and U.S. persons are generally prohibited from dealing with them. So if a domain name is on that list, it's impossible to create a Letsencrypt certificate with that domain name. Check the list manual - https://www.treasury.gov/resource-center/sanctions/sdn-list/pages/default.aspx
https://pl.csie.ntut.edu.tw/.well-known/acme-challenge/check-your-website-dot-server-daten-dot-de
404
4.930 seconds
Warning: 404 needs more then one second
ADuration: 969793 milliseconds, 969.793 seconds

 

8. Connections

DomainIPPortCert.ProtocolKeyExchangeStrengthCipherStrengthHashAlgorithmOCSP stapling
Domain/KeyExchangeIP/StrengthPort/CipherCert./StrengthProtocol/HashAlgorithmOCSP stapling
pl.csie.ntut.edu.tw
140.124.181.82
443
ok
Tls12
ECDH Ephermal
255
Aes256
256
Sha384
error checking OCSP stapling
ok
pl.csie.ntut.edu.tw
140.124.181.82
443
ok
Tls12

ECDH Ephermal
255
Aes256
256
Sha384
error checking OCSP stapling
ok
no http/2 via ALPN 
No SNI required - domain included in main certificate 		Tls.1.2
no Tls.1.1
no Tls.1.0
no http/2 via ALPN
No SNI required - domain included in main certificate 		Tls.1.2
no Tls.1.1
no Tls.1.0
Chain - incomplete

1CN=pl.csie.ntut.edu.tw


2CN=ZeroSSL RSA Domain Secure Site CA, O=ZeroSSL, C=AT


pl.csie.ntut.edu.tw
pl.csie.ntut.edu.tw
443
ok
Tls12
ECDH Ephermal
255
Aes256
256
Sha384
error checking OCSP stapling
ok

pl.csie.ntut.edu.tw
pl.csie.ntut.edu.tw
443
ok
Tls12

ECDH Ephermal
255
Aes256
256
Sha384
error checking OCSP stapling
ok
no http/2 via ALPN 
Tls.1.2
no Tls.1.1
no Tls.1.0
no http/2 via ALPN
 Tls.1.2
no Tls.1.1
no Tls.1.0
Chain - incomplete

1CN=pl.csie.ntut.edu.tw


2CN=ZeroSSL RSA Domain Secure Site CA, O=ZeroSSL, C=AT


140.124.181.82
140.124.181.82
443
name does not match
Tls12
ECDH Ephermal
255
Aes256
256
Sha384
error checking OCSP stapling
ok

140.124.181.82
140.124.181.82
443
name does not match
Tls12

ECDH Ephermal
255
Aes256
256
Sha384
error checking OCSP stapling
ok
no http/2 via ALPN 
Cert sent without SNI 		Tls.1.2
no Tls.1.1
no Tls.1.0
no http/2 via ALPN
Cert sent without SNI 		Tls.1.2
no Tls.1.1
no Tls.1.0
Chain - incomplete

1CN=pl.csie.ntut.edu.tw


2CN=ZeroSSL RSA Domain Secure Site CA, O=ZeroSSL, C=AT

 

9. Certificates

1.
1.
CN=pl.csie.ntut.edu.tw
18.08.2020
17.11.2020
1623 days expired		pl.csie.ntut.edu.tw - 1 entry
1.
1.
CN=pl.csie.ntut.edu.tw
18.08.2020

17.11.2020
1623 days expired


pl.csie.ntut.edu.tw - 1 entry

KeyalgorithmRSA encryption (2048 bit)
Signatur:SHA384 With RSA Encryption
Serial Number:00D8F562ECBE3A5084E1EE046FD0B1B965
Thumbprint:89C4486D87366167A832D98D89096BE51C8916D3
SHA256 / Certificate:xLQNFOq7thGF4eiAYRhGtJ+d4ZVw516QJHj8SEHuMuE=
SHA256 hex / Cert (DANE * 0 1):e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855
SHA256 hex / PublicKey (DANE * 1 1):9c879e82dbc722b8884fff97bbe585c8359a90b12bc8a655582ee6e4308b7a45
SHA256 hex / Subject Public Key Information (SPKI):9c879e82dbc722b8884fff97bbe585c8359a90b12bc8a655582ee6e4308b7a45
SPKI checked via https://v1.pwnedkeys.com/spki-hash:Good: Key isn't compromised
OCSP - Url:http://zerossl.ocsp.sectigo.com
OCSP - must staple:no
Certificate Transparency:yes
Enhanced Key Usage:Serverauthentifizierung (1.3.6.1.5.5.7.3.1), Clientauthentifizierung (1.3.6.1.5.5.7.3.2)




2.
CN=pl.csie.ntut.edu.tw
18.08.2020
17.11.2020
1623 days expired		pl.csie.ntut.edu.tw - 1 entry

2.
CN=pl.csie.ntut.edu.tw
18.08.2020

17.11.2020
1623 days expired


pl.csie.ntut.edu.tw - 1 entry

KeyalgorithmRSA encryption (2048 bit)
Signatur:SHA384 With RSA Encryption
Serial Number:00D8F562ECBE3A5084E1EE046FD0B1B965
Thumbprint:89C4486D87366167A832D98D89096BE51C8916D3
SHA256 / Certificate:xLQNFOq7thGF4eiAYRhGtJ+d4ZVw516QJHj8SEHuMuE=
SHA256 hex / Cert (DANE * 0 1):e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855
SHA256 hex / PublicKey (DANE * 1 1):9c879e82dbc722b8884fff97bbe585c8359a90b12bc8a655582ee6e4308b7a45
SHA256 hex / Subject Public Key Information (SPKI):9c879e82dbc722b8884fff97bbe585c8359a90b12bc8a655582ee6e4308b7a45
SPKI checked via https://v1.pwnedkeys.com/spki-hash:Good: Key isn't compromised
OCSP - Url:http://zerossl.ocsp.sectigo.com
OCSP - must staple:no
Certificate Transparency:yes
Enhanced Key Usage:Serverauthentifizierung (1.3.6.1.5.5.7.3.1), Clientauthentifizierung (1.3.6.1.5.5.7.3.2)




3.
CN=ZeroSSL RSA Domain Secure Site CA, O=ZeroSSL, C=AT
30.01.2020
30.01.2030
expires in 1738 days

3.
CN=ZeroSSL RSA Domain Secure Site CA, O=ZeroSSL, C=AT
30.01.2020

30.01.2030
expires in 1738 days




KeyalgorithmRSA encryption (4096 bit)
Signatur:SHA384 With RSA Encryption
Serial Number:6C55ABDBD00792C79D070CD8119ED6BF
Thumbprint:C81A8BD1F9CF6D84C525F378CA1D3F8C30770E34
SHA256 / Certificate:IazB29aUT5rBjHgstcMo1sKCHGtjcx+juJh/ViXeig0=
SHA256 hex / Cert (DANE * 0 1):e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855
SHA256 hex / PublicKey (DANE * 1 1):47785c30e006c34585cedb86dac913a1da07a7c20689ddd083adc29fb6146283
SHA256 hex / Subject Public Key Information (SPKI):47785c30e006c34585cedb86dac913a1da07a7c20689ddd083adc29fb6146283
SPKI checked via https://v1.pwnedkeys.com/spki-hash:Check unknown. No result 404 / 200
OCSP - Url:http://ocsp.usertrust.com
OCSP - must staple:no
Certificate Transparency:no
Enhanced Key Usage:Serverauthentifizierung (1.3.6.1.5.5.7.3.1), Clientauthentifizierung (1.3.6.1.5.5.7.3.2)




4.
CN=ZeroSSL RSA Domain Secure Site CA, O=ZeroSSL, C=AT
30.01.2020
30.01.2030
expires in 1738 days

4.
CN=ZeroSSL RSA Domain Secure Site CA, O=ZeroSSL, C=AT
30.01.2020

30.01.2030
expires in 1738 days




KeyalgorithmRSA encryption (4096 bit)
Signatur:SHA384 With RSA Encryption
Serial Number:6C55ABDBD00792C79D070CD8119ED6BF
Thumbprint:C81A8BD1F9CF6D84C525F378CA1D3F8C30770E34
SHA256 / Certificate:IazB29aUT5rBjHgstcMo1sKCHGtjcx+juJh/ViXeig0=
SHA256 hex / Cert (DANE * 0 1):e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855
SHA256 hex / PublicKey (DANE * 1 1):47785c30e006c34585cedb86dac913a1da07a7c20689ddd083adc29fb6146283
SHA256 hex / Subject Public Key Information (SPKI):47785c30e006c34585cedb86dac913a1da07a7c20689ddd083adc29fb6146283
SPKI checked via https://v1.pwnedkeys.com/spki-hash:Check unknown. No result 404 / 200
OCSP - Url:http://ocsp.usertrust.com
OCSP - must staple:no
Certificate Transparency:no
Enhanced Key Usage:Serverauthentifizierung (1.3.6.1.5.5.7.3.1), Clientauthentifizierung (1.3.6.1.5.5.7.3.2)




5.
CN=USERTrust RSA Certification Authority, O=The USERTRUST Network, L=Jersey City, S=New Jersey, C=US
01.02.2010
19.01.2038
expires in 4649 days

5.
CN=USERTrust RSA Certification Authority, O=The USERTRUST Network, L=Jersey City, S=New Jersey, C=US
01.02.2010

19.01.2038
expires in 4649 days




KeyalgorithmRSA encryption (4096 bit)
Signatur:SHA384 With RSA Encryption
Serial Number:01FD6D30FCA3CA51A81BBC640E35032D
Thumbprint:2B8F1B57330DBBA2D07A6C51F70EE90DDAB9AD8E
SHA256 / Certificate:55PJsC/YqhPiHDEiisywgRlkO3SciYlksXRtRsPUy9I=
SHA256 hex / Cert (DANE * 0 1):e793c9b02fd8aa13e21c31228accb08119643b749c898964b1746d46c3d4cbd2
SHA256 hex / PublicKey (DANE * 1 1):c784333d20bcd742b9fdc3236f4e509b8937070e73067e254dd3bf9c45bf4dde
SHA256 hex / Subject Public Key Information (SPKI):c784333d20bcd742b9fdc3236f4e509b8937070e73067e254dd3bf9c45bf4dde
SPKI checked via https://v1.pwnedkeys.com/spki-hash:Good: Key isn't compromised
OCSP - Url:
OCSP - must staple:no
Certificate Transparency:no
Enhanced Key Usage:





6.
CN=USERTrust RSA Certification Authority, O=The USERTRUST Network, L=Jersey City, S=New Jersey, C=US
12.03.2019
01.01.2029
expires in 1344 days

6.
CN=USERTrust RSA Certification Authority, O=The USERTRUST Network, L=Jersey City, S=New Jersey, C=US
12.03.2019

01.01.2029
expires in 1344 days




KeyalgorithmRSA encryption (4096 bit)
Signatur:SHA384 With RSA Encryption
Serial Number:3972443AF922B751D7D36C10DD313595
Thumbprint:D89E3BD43D5D909B47A18977AA9D5CE36CEE184C
SHA256 / Certificate:aLnHYSGaWx8BMXhEdGZdthu9sQngDwXKn3QkTuX19Ss=
SHA256 hex / Cert (DANE * 0 1):e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855
SHA256 hex / PublicKey (DANE * 1 1):c784333d20bcd742b9fdc3236f4e509b8937070e73067e254dd3bf9c45bf4dde
SHA256 hex / Subject Public Key Information (SPKI):c784333d20bcd742b9fdc3236f4e509b8937070e73067e254dd3bf9c45bf4dde
SPKI checked via https://v1.pwnedkeys.com/spki-hash:Good: Key isn't compromised
OCSP - Url:http://ocsp.comodoca.com
OCSP - must staple:no
Certificate Transparency:no
Enhanced Key Usage:




7.
CN=AAA Certificate Services, O=Comodo CA Limited, L=Salford, S=Greater Manchester, C=GB
01.01.2004
01.01.2029
expires in 1344 days

7.
CN=AAA Certificate Services, O=Comodo CA Limited, L=Salford, S=Greater Manchester, C=GB
01.01.2004

01.01.2029
expires in 1344 days




KeyalgorithmRSA encryption (2048 bit)
Signatur:SHA-1 with RSA Encryption
Serial Number:01
Thumbprint:D1EB23A46D17D68FD92564C2F1F1601764D8E349
SHA256 / Certificate:16eg+11+JzHXcelITrze9x1fDD4KKUh4K8g+4OppnvQ=
SHA256 hex / Cert (DANE * 0 1):e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855
SHA256 hex / PublicKey (DANE * 1 1):bd153ed7b0434f6886b17bce8bbe84ed340c7132d702a8f4fa318f756ecbd6f3
SHA256 hex / Subject Public Key Information (SPKI):bd153ed7b0434f6886b17bce8bbe84ed340c7132d702a8f4fa318f756ecbd6f3
SPKI checked via https://v1.pwnedkeys.com/spki-hash:Good: Key isn't compromised
OCSP - Url:
OCSP - must staple:no
Certificate Transparency:no
Enhanced Key Usage:




 

10. Last Certificates - Certificate Transparency Log Check

1. Source CertSpotter - active certificates (one check per day)

Small Code Update - wait one minute

 

2. Source crt.sh - old and new certificates, sometimes very slow - only certificates with "not after" > of the last months are listed

Small Code Update - wait one minute

 

11. Html-Content - Entries

Summary

No data found or small Code-update

 

Details (currently limited to 500 rows - some problems with spam users)

Small Code Update - wait one minute

 

12. Html-Parsing via https://validator.w3.org/nu/

Small Code update, wait one minute

 

13. Nameserver - IP-Adresses

Required Root-climbing DNS-Queries to find ip addresses of all Name Servers:

 

 

No NameServer - IP address - Informations found

 

14. CAA - Entries

DomainnameflagNameValue∑ Queries∑ Timeout
pl.csie.ntut.edu.tw
0

no CAA entry found
1
0
csie.ntut.edu.tw
0

no CAA entry found
1
0
ntut.edu.tw
0

no CAA entry found
1
0
edu.tw
0

no CAA entry found
1
0
tw
0

no CAA entry found
1
0

 

15. TXT - Entries

DomainnameTXT EntryStatus∑ Queries∑ Timeout
csie.ntut.edu.tw
v=spf1 mx ip4:140.124.180.1 mx:csie.ntut.edu.tw -all
ok
1
0
pl.csie.ntut.edu.tw

ok
1
0
_acme-challenge.pl.csie.ntut.edu.tw

Name Error - The domain name does not exist
1
0
_acme-challenge.pl.csie.ntut.edu.tw.csie.ntut.edu.tw

Name Error - The domain name does not exist
1
0
_acme-challenge.pl.csie.ntut.edu.tw.pl.csie.ntut.edu.tw

Name Error - The domain name does not exist
1
0

 

16. DomainService - Entries

No DomainServiceEntries entries found

 

 

17. Cipher Suites

No Ciphers found

 

18. Portchecks

DomainIPPortDescriptionResultAnswer
pl.csie.ntut.edu.tw
140.124.181.82
21
FTP



pl.csie.ntut.edu.tw
140.124.181.82
21
FTP



pl.csie.ntut.edu.tw
140.124.181.82
22
SSH



pl.csie.ntut.edu.tw
140.124.181.82
22
SSH



pl.csie.ntut.edu.tw
140.124.181.82
25
SMTP



pl.csie.ntut.edu.tw
140.124.181.82
25
SMTP



pl.csie.ntut.edu.tw
140.124.181.82
53
DNS



pl.csie.ntut.edu.tw
140.124.181.82
53
DNS



pl.csie.ntut.edu.tw
140.124.181.82
110
POP3



pl.csie.ntut.edu.tw
140.124.181.82
110
POP3



pl.csie.ntut.edu.tw
140.124.181.82
143
IMAP



pl.csie.ntut.edu.tw
140.124.181.82
143
IMAP



pl.csie.ntut.edu.tw
140.124.181.82
465
SMTP (encrypted)



pl.csie.ntut.edu.tw
140.124.181.82
465
SMTP (encrypted)



pl.csie.ntut.edu.tw
140.124.181.82
587
SMTP (encrypted, submission)



pl.csie.ntut.edu.tw
140.124.181.82
587
SMTP (encrypted, submission)



pl.csie.ntut.edu.tw
140.124.181.82
993
IMAP (encrypted)



pl.csie.ntut.edu.tw
140.124.181.82
993
IMAP (encrypted)



pl.csie.ntut.edu.tw
140.124.181.82
995
POP3 (encrypted)



pl.csie.ntut.edu.tw
140.124.181.82
995
POP3 (encrypted)



pl.csie.ntut.edu.tw
140.124.181.82
1433
MS SQL



pl.csie.ntut.edu.tw
140.124.181.82
1433
MS SQL



pl.csie.ntut.edu.tw
140.124.181.82
2082
cPanel (http)



pl.csie.ntut.edu.tw
140.124.181.82
2082
cPanel (http)



pl.csie.ntut.edu.tw
140.124.181.82
2083
cPanel (https)



pl.csie.ntut.edu.tw
140.124.181.82
2083
cPanel (https)



pl.csie.ntut.edu.tw
140.124.181.82
2086
WHM (http)



pl.csie.ntut.edu.tw
140.124.181.82
2086
WHM (http)



pl.csie.ntut.edu.tw
140.124.181.82
2087
WHM (https)



pl.csie.ntut.edu.tw
140.124.181.82
2087
WHM (https)



pl.csie.ntut.edu.tw
140.124.181.82
2089
cPanel Licensing



pl.csie.ntut.edu.tw
140.124.181.82
2089
cPanel Licensing



pl.csie.ntut.edu.tw
140.124.181.82
2095
cPanel Webmail (http)



pl.csie.ntut.edu.tw
140.124.181.82
2095
cPanel Webmail (http)



pl.csie.ntut.edu.tw
140.124.181.82
2096
cPanel Webmail (https)



pl.csie.ntut.edu.tw
140.124.181.82
2096
cPanel Webmail (https)



pl.csie.ntut.edu.tw
140.124.181.82
2222
DirectAdmin (http)



pl.csie.ntut.edu.tw
140.124.181.82
2222
DirectAdmin (http)



pl.csie.ntut.edu.tw
140.124.181.82
2222
DirectAdmin (https)



pl.csie.ntut.edu.tw
140.124.181.82
2222
DirectAdmin (https)



pl.csie.ntut.edu.tw
140.124.181.82
3306
mySql



pl.csie.ntut.edu.tw
140.124.181.82
3306
mySql



pl.csie.ntut.edu.tw
140.124.181.82
5224
Plesk Licensing



pl.csie.ntut.edu.tw
140.124.181.82
5224
Plesk Licensing



pl.csie.ntut.edu.tw
140.124.181.82
5432
PostgreSQL



pl.csie.ntut.edu.tw
140.124.181.82
5432
PostgreSQL



pl.csie.ntut.edu.tw
140.124.181.82
8080
Ookla Speedtest (http)



pl.csie.ntut.edu.tw
140.124.181.82
8080
Ookla Speedtest (http)



pl.csie.ntut.edu.tw
140.124.181.82
8080
Ookla Speedtest (https)



pl.csie.ntut.edu.tw
140.124.181.82
8080
Ookla Speedtest (https)



pl.csie.ntut.edu.tw
140.124.181.82
8083
VestaCP http



pl.csie.ntut.edu.tw
140.124.181.82
8083
VestaCP http



pl.csie.ntut.edu.tw
140.124.181.82
8083
VestaCP https



pl.csie.ntut.edu.tw
140.124.181.82
8083
VestaCP https



pl.csie.ntut.edu.tw
140.124.181.82
8443
Plesk Administration (https)



pl.csie.ntut.edu.tw
140.124.181.82
8443
Plesk Administration (https)



pl.csie.ntut.edu.tw
140.124.181.82
8447
Plesk Installer + Updates



pl.csie.ntut.edu.tw
140.124.181.82
8447
Plesk Installer + Updates



pl.csie.ntut.edu.tw
140.124.181.82
8880
Plesk Administration (http)



pl.csie.ntut.edu.tw
140.124.181.82
8880
Plesk Administration (http)



pl.csie.ntut.edu.tw
140.124.181.82
10000
Webmin (http)



pl.csie.ntut.edu.tw
140.124.181.82
10000
Webmin (http)



pl.csie.ntut.edu.tw
140.124.181.82
10000
Webmin (https)



pl.csie.ntut.edu.tw
140.124.181.82
10000
Webmin (https)



 

 

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Last Result: https://check-your-website.server-daten.de/?q=pl.csie.ntut.edu.tw - 2020-08-18 10:00:00

 

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