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



X

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

Checked:
10.06.2021 13:14:53


Older results

No older results found


1. IP-Addresses

HostTypeIP-Addressis auth.∑ Queries∑ Timeout
vccourses.cs.ovgu.de
CNAME
vccourses2.cs.ovgu.de
yes
1
0

A
141.44.23.45
Magdeburg/Saxony-Anhalt/Germany (DE) - Verein zur Foerderung eines Deutschen Forschungsnetzes e.V.
Hostname: vccourses2.cs.uni-magdeburg.de
yes


www.vccourses.cs.ovgu.de

Name Error
yes
1
0
*.cs.ovgu.de
A
Name Error
yes



AAAA
Fatal: DNS Timeout
yes



CNAME
Name Error
yes


*.vccourses.cs.ovgu.de
A
Name Error
yes



AAAA
Name Error
yes



CNAME
Name Error
yes



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 14631, Flags 256



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



1 RRSIG RR to validate DNSKEY RR found



RRSIG-Owner (root), Algorithm: 8, 0 Labels, original TTL: 172800 sec, Signature-expiration: 01.07.2021, 00:00:00 +, Signature-Inception: 10.06.2021, 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: de
de
1 DS RR in the parent zone found



DS with Algorithm 8, KeyTag 26755, DigestType 2 and Digest 80E1eAmllUMRzLgq3hFMbB1ySnXAOVE3qjl4A1Ql540=



2 RRSIG RR to validate DS RR found



RRSIG-Owner de., Algorithm: 8, 1 Labels, original TTL: 86400 sec, Signature-expiration: 23.06.2021, 05:00:00 +, Signature-Inception: 10.06.2021, 04:00:00 +, KeyTag 14631, Signer-Name: (root)



Status: Good - Algorithmus 8 and DNSKEY with KeyTag 14631 used to validate the DS RRSet in the parent zone



2 DNSKEY RR found



Public Key with Algorithm 8, KeyTag 26755, Flags 257 (SEP = Secure Entry Point)



Public Key with Algorithm 8, KeyTag 26895, Flags 256



1 RRSIG RR to validate DNSKEY RR found



RRSIG-Owner de., Algorithm: 8, 1 Labels, original TTL: 300 sec, Signature-expiration: 21.06.2021, 11:44:32 +, Signature-Inception: 07.06.2021, 10:14:32 +, KeyTag 26755, Signer-Name: de



Status: Good - Algorithmus 8 and DNSKEY with KeyTag 26755 used to validate the DNSKEY RRSet



Status: Valid Chain of trust. Parent-DS with Algorithm 8, KeyTag 26755, DigestType 2 and Digest "80E1eAmllUMRzLgq3hFMbB1ySnXAOVE3qjl4A1Ql540=" validates local Key with the same values, Key ist Secure Entry Point (SEP) of the zone

Zone: ovgu.de
ovgu.de
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 "m9vj9r36s0tqjj4j0op0in9vvptqfil6" between the hashed NSEC3-owner "m9viqf02a0v6rqgnbh5ani2t10p3avpb" and the hashed NextOwner "m9vk1p26a1539uqa8tii1ofct4j1uu2s". So the parent zone confirmes the not-existence of a DS RR.
Bitmap: NS, DS, RRSIG Validated: RRSIG-Owner m9viqf02a0v6rqgnbh5ani2t10p3avpb.de., Algorithm: 8, 2 Labels, original TTL: 7200 sec, Signature-expiration: 20.06.2021, 04:04:03 +, Signature-Inception: 06.06.2021, 02:34:03 +, KeyTag 26895, Signer-Name: de



DS-Query in the parent zone sends valid NSEC3 RR with the Hash "tjlb7qbojvmlf1s6gdriru7vsms1lg16" as Owner. That's the Hash of "de" with the NextHashedOwnerName "tjlfjprvcmsth243pmi98vqtj9pgi7us". So that domain name is the Closest Encloser of "ovgu.de". Opt-Out: True.
Bitmap: NS, SOA, RRSIG, DNSKEY, NSEC3PARAM Validated: RRSIG-Owner tjlb7qbojvmlf1s6gdriru7vsms1lg16.de., Algorithm: 8, 2 Labels, original TTL: 7200 sec, Signature-expiration: 20.06.2021, 01:49:06 +, Signature-Inception: 06.06.2021, 00:19:06 +, KeyTag 26895, Signer-Name: de



0 DNSKEY RR found




Zone: cs.ovgu.de
cs.ovgu.de
0 DS RR in the parent zone found



0 DNSKEY RR found




Zone: vccourses.cs.ovgu.de
vccourses.cs.ovgu.de
0 DS RR in the parent zone found

Zone: www.vccourses.cs.ovgu.de
www.vccourses.cs.ovgu.de
0 DS RR in the parent zone found

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 14631, Flags 256



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



1 RRSIG RR to validate DNSKEY RR found



RRSIG-Owner (root), Algorithm: 8, 0 Labels, original TTL: 172800 sec, Signature-expiration: 01.07.2021, 00:00:00 +, Signature-Inception: 10.06.2021, 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: de
de
1 DS RR in the parent zone found



DS with Algorithm 8, KeyTag 26755, DigestType 2 and Digest 80E1eAmllUMRzLgq3hFMbB1ySnXAOVE3qjl4A1Ql540=



2 RRSIG RR to validate DS RR found



RRSIG-Owner de., Algorithm: 8, 1 Labels, original TTL: 86400 sec, Signature-expiration: 23.06.2021, 05:00:00 +, Signature-Inception: 10.06.2021, 04:00:00 +, KeyTag 14631, Signer-Name: (root)



Status: Good - Algorithmus 8 and DNSKEY with KeyTag 14631 used to validate the DS RRSet in the parent zone



2 DNSKEY RR found



Public Key with Algorithm 8, KeyTag 26755, Flags 257 (SEP = Secure Entry Point)



Public Key with Algorithm 8, KeyTag 26895, Flags 256



1 RRSIG RR to validate DNSKEY RR found



RRSIG-Owner de., Algorithm: 8, 1 Labels, original TTL: 300 sec, Signature-expiration: 21.06.2021, 11:44:32 +, Signature-Inception: 07.06.2021, 10:14:32 +, KeyTag 26755, Signer-Name: de



Status: Good - Algorithmus 8 and DNSKEY with KeyTag 26755 used to validate the DNSKEY RRSet



Status: Valid Chain of trust. Parent-DS with Algorithm 8, KeyTag 26755, DigestType 2 and Digest "80E1eAmllUMRzLgq3hFMbB1ySnXAOVE3qjl4A1Ql540=" validates local Key with the same values, Key ist Secure Entry Point (SEP) of the zone

Zone: ovgu.de
ovgu.de
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 "m9vj9r36s0tqjj4j0op0in9vvptqfil6" between the hashed NSEC3-owner "m9viqf02a0v6rqgnbh5ani2t10p3avpb" and the hashed NextOwner "m9vk1p26a1539uqa8tii1ofct4j1uu2s". So the parent zone confirmes the not-existence of a DS RR.
Bitmap: NS, DS, RRSIG Validated: RRSIG-Owner m9viqf02a0v6rqgnbh5ani2t10p3avpb.de., Algorithm: 8, 2 Labels, original TTL: 7200 sec, Signature-expiration: 20.06.2021, 04:04:03 +, Signature-Inception: 06.06.2021, 02:34:03 +, KeyTag 26895, Signer-Name: de



DS-Query in the parent zone sends valid NSEC3 RR with the Hash "tjlb7qbojvmlf1s6gdriru7vsms1lg16" as Owner. That's the Hash of "de" with the NextHashedOwnerName "tjlfjprvcmsth243pmi98vqtj9pgi7us". So that domain name is the Closest Encloser of "ovgu.de". Opt-Out: True.
Bitmap: NS, SOA, RRSIG, DNSKEY, NSEC3PARAM Validated: RRSIG-Owner tjlb7qbojvmlf1s6gdriru7vsms1lg16.de., Algorithm: 8, 2 Labels, original TTL: 7200 sec, Signature-expiration: 20.06.2021, 01:49:06 +, Signature-Inception: 06.06.2021, 00:19:06 +, KeyTag 26895, Signer-Name: de



0 DNSKEY RR found




Zone: cs.ovgu.de
cs.ovgu.de
0 DS RR in the parent zone found



0 DNSKEY RR found




Zone: vccourses2.cs.ovgu.de
vccourses2.cs.ovgu.de
0 DS RR in the parent zone found



0 DNSKEY RR found




3. Name Servers

DomainNameserverNS-IP
www.vccourses.cs.ovgu.de
  ns.cs.ovgu.de

cs.ovgu.de
  luxator.cs.ovgu.de
141.44.23.1
Magdeburg/Saxony-Anhalt/Germany (DE) - Verein zur Foerderung eines Deutschen Forschungsnetzes e.V.


  ns.cs.ovgu.de
141.44.21.1
Magdeburg/Saxony-Anhalt/Germany (DE) - Verein zur Foerderung eines Deutschen Forschungsnetzes e.V.


  ns.cs.uni-magdeburg.de
141.44.21.1
Magdeburg/Saxony-Anhalt/Germany (DE) - Verein zur Foerderung eines Deutschen Forschungsnetzes e.V.


  ns2.cs.ovgu.de
141.44.24.32
Magdeburg/Saxony-Anhalt/Germany (DE) - Verein zur Foerderung eines Deutschen Forschungsnetzes e.V.


  ns2.cs.uni-magdeburg.de
141.44.24.32
Magdeburg/Saxony-Anhalt/Germany (DE) - Verein zur Foerderung eines Deutschen Forschungsnetzes e.V.

ovgu.de
  dfnserv1.urz.uni-magdeburg.de
141.44.1.1
Magdeburg/Saxony-Anhalt/Germany (DE) - Verein zur Foerderung eines Deutschen Forschungsnetzes e.V.


  dfnserv2.urz.uni-magdeburg.de
141.44.1.2
Magdeburg/Saxony-Anhalt/Germany (DE) - Verein zur Foerderung eines Deutschen Forschungsnetzes e.V.


  dns-2.dfn.de
193.174.75.54
Senftenberg/Brandenburg/Germany (DE) - Verein zur Foerderung eines Deutschen Forschungsnetzes e.V.


 
2001:638:d:b102::1
Stuttgart/Baden-Württemberg/Germany (DE) - Verein zur Foerderung eines Deutschen Forschungsnetzes e.V.


  dns-3.dfn.de
193.174.75.58
Senftenberg/Brandenburg/Germany (DE) - Verein zur Foerderung eines Deutschen Forschungsnetzes e.V.


 
2001:638:d:b103::1
Stuttgart/Baden-Württemberg/Germany (DE) - Verein zur Foerderung eines Deutschen Forschungsnetzes e.V.

de
  a.nic.de / ns-1.de.de8.bind


  f.nic.de / ns-1.de.de1


  l.de.net / ns-2.de.fr1


  n.de.net / s3.amx


  s.de.net / ns-3.de.de9


  z.nic.de / ns-3.de.de2.bind


vccourses2.cs.ovgu.de
  ns.cs.ovgu.de

cs.ovgu.de
  luxator.cs.ovgu.de
141.44.23.1
Magdeburg/Saxony-Anhalt/Germany (DE) - Verein zur Foerderung eines Deutschen Forschungsnetzes e.V.


  ns.cs.ovgu.de
141.44.21.1
Magdeburg/Saxony-Anhalt/Germany (DE) - Verein zur Foerderung eines Deutschen Forschungsnetzes e.V.


  ns.cs.uni-magdeburg.de
141.44.21.1
Magdeburg/Saxony-Anhalt/Germany (DE) - Verein zur Foerderung eines Deutschen Forschungsnetzes e.V.


  ns2.cs.ovgu.de
141.44.24.32
Magdeburg/Saxony-Anhalt/Germany (DE) - Verein zur Foerderung eines Deutschen Forschungsnetzes e.V.


  ns2.cs.uni-magdeburg.de
141.44.24.32
Magdeburg/Saxony-Anhalt/Germany (DE) - Verein zur Foerderung eines Deutschen Forschungsnetzes e.V.

ovgu.de
  dfnserv1.urz.uni-magdeburg.de
141.44.1.1
Magdeburg/Saxony-Anhalt/Germany (DE) - Verein zur Foerderung eines Deutschen Forschungsnetzes e.V.


  dfnserv2.urz.uni-magdeburg.de
141.44.1.2
Magdeburg/Saxony-Anhalt/Germany (DE) - Verein zur Foerderung eines Deutschen Forschungsnetzes e.V.


  dns-2.dfn.de
193.174.75.54
Senftenberg/Brandenburg/Germany (DE) - Verein zur Foerderung eines Deutschen Forschungsnetzes e.V.


 
2001:638:d:b102::1
Stuttgart/Baden-Württemberg/Germany (DE) - Verein zur Foerderung eines Deutschen Forschungsnetzes e.V.


  dns-3.dfn.de
193.174.75.58
Senftenberg/Brandenburg/Germany (DE) - Verein zur Foerderung eines Deutschen Forschungsnetzes e.V.


 
2001:638:d:b103::1
Stuttgart/Baden-Württemberg/Germany (DE) - Verein zur Foerderung eines Deutschen Forschungsnetzes e.V.

de
  a.nic.de / ns-2.de.de8.bind


  f.nic.de / ns-1.de.de1


  l.de.net / ns-1.de.fr1


  n.de.net / s3.amx


  s.de.net / ns-3.de.de9


  z.nic.de / ns-1.de.de2.bind


4. SOA-Entries


Domain:de
Zone-Name:de
Primary:f.nic.de
Mail:its.denic.de
Serial:1623323624
Refresh:7200
Retry:7200
Expire:3600000
TTL:7200
num Entries:6


Domain:ovgu.de
Zone-Name:ovgu.de
Primary:dfnserv2.urz.uni-magdeburg.de
Mail:netmaster.uni-magdeburg.de
Serial:2021060900
Refresh:86400
Retry:7200
Expire:3600000
TTL:3600
num Entries:6


Domain:cs.ovgu.de
Zone-Name:cs.ovgu.de
Primary:ns.cs.ovgu.de
Mail:nsadm.cs.ovgu.de
Serial:2021061002
Refresh:86400
Retry:600
Expire:24796800
TTL:600
num Entries:5


Domain:www.vccourses.cs.ovgu.de
Zone-Name:
Primary:
Mail:
Serial:
Refresh:
Retry:
Expire:
TTL:
num Entries:1



Domain:de
Zone-Name:de
Primary:f.nic.de
Mail:its.denic.de
Serial:1623323624
Refresh:7200
Retry:7200
Expire:3600000
TTL:7200
num Entries:6


Domain:ovgu.de
Zone-Name:ovgu.de
Primary:dfnserv2.urz.uni-magdeburg.de
Mail:netmaster.uni-magdeburg.de
Serial:2021060900
Refresh:86400
Retry:7200
Expire:3600000
TTL:3600
num Entries:6


Domain:cs.ovgu.de
Zone-Name:cs.ovgu.de
Primary:ns.cs.ovgu.de
Mail:nsadm.cs.ovgu.de
Serial:2021061002
Refresh:86400
Retry:600
Expire:24796800
TTL:600
num Entries:5


Domain:vccourses2.cs.ovgu.de
Zone-Name:
Primary:
Mail:
Serial:
Refresh:
Retry:
Expire:
TTL:
num Entries:1


5. Screenshots

Startaddress: https://vccourses.cs.ovgu.de/users/sign_in, address used: https://vccourses.cs.ovgu.de/users/sign_in, Screenshot created 2021-06-10 13:16:43 +00:0

Mobil (412px x 732px)

351 milliseconds

Screenshot mobile - https://vccourses.cs.ovgu.de/users/sign_in
Mobil + Landscape (732px x 412px)

328 milliseconds

Screenshot mobile landscape - https://vccourses.cs.ovgu.de/users/sign_in
Screen (1280px x 1680px)

485 milliseconds

Screenshot Desktop - https://vccourses.cs.ovgu.de/users/sign_in

Mobile- and other Chrome-Checks

widthheight
visual Viewport396732
content Size396761

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 1.3, X25519, and AES_256_GCM.

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

6. Url-Checks


:

:
DomainnameHttp-StatusredirectSec.G
• http://vccourses.cs.ovgu.de/
141.44.23.45
301
https://vccourses.cs.ovgu.de:443/
Html is minified: 109.46 %
0.030
A
Server: nginx
Date: Thu, 10 Jun 2021 11:15:59 GMT
Content-Type: text/html
Content-Length: 162
Connection: close
Location: https://vccourses.cs.ovgu.de:443/

• https://vccourses.cs.ovgu.de/
141.44.23.45
302
https://vccourses.cs.ovgu.de/users/sign_in
Html is minified: 100.00 %
2.410
A
Server: nginx
Date: Thu, 10 Jun 2021 11:15:59 GMT
Content-Type: text/html; charset=utf-8
Content-Length: 108
Connection: close
Cache-Control: no-cache
Location: https://vccourses.cs.ovgu.de/users/sign_in
X-Content-Type-Options: nosniff
X-Download-Options: noopen
X-Frame-Options: DENY
X-Gitlab-Feature-Category: projects
X-Permitted-Cross-Domain-Policies: none
X-Request-Id: 01F7TT5NA63AXVA1YVF94751MW
X-Runtime: 0.014748
X-Ua-Compatible: IE=edge
X-Xss-Protection: 1; mode=block
Strict-Transport-Security: max-age=31536000
Referrer-Policy: strict-origin-when-cross-origin

• https://vccourses.cs.ovgu.de:443/

302
https://vccourses.cs.ovgu.de/users/sign_in
Html is minified: 100.00 %
2.160
A
Server: nginx
Date: Thu, 10 Jun 2021 11:16:06 GMT
Content-Type: text/html; charset=utf-8
Content-Length: 108
Connection: close
Cache-Control: no-cache
Location: https://vccourses.cs.ovgu.de/users/sign_in
X-Content-Type-Options: nosniff
X-Download-Options: noopen
X-Frame-Options: DENY
X-Gitlab-Feature-Category: projects
X-Permitted-Cross-Domain-Policies: none
X-Request-Id: 01F7TT5VQF9FPZ2FR5NXQ9XXHG
X-Runtime: 0.009522
X-Ua-Compatible: IE=edge
X-Xss-Protection: 1; mode=block
Strict-Transport-Security: max-age=31536000
Referrer-Policy: strict-origin-when-cross-origin

• https://vccourses.cs.ovgu.de/users/sign_in
GZip used - 13829 / 52356 - 73.59 %
Inline-JavaScript (∑/total): 3/544 Inline-CSS (∑/total): 1/43751
200

Html is minified: 662.31 %
2.226
A
small visible content (num chars: 313)
GitLab A complete DevOps platform GitLab is a single application for the entire software development lifecycle. From project planning and source code management to CI/CD, monitoring, and security. This is a self-managed instance of GitLab. Username or email Password Remember me Forgot your password? About GitLab
Server: nginx
Date: Thu, 10 Jun 2021 11:16:09 GMT
Content-Type: text/html; charset=utf-8
Transfer-Encoding: chunked
Connection: close
Vary: Accept-Encoding
Cache-Control: max-age=0, private, must-revalidate
Etag: W/"bcaedc5b216425daf94533e4709c1697"
Permissions-Policy: interest-cohort=()
Set-Cookie: _gitlab_session=d458ea806b8117c16fc60d47041521af; path=/; expires=Thu, 10 Jun 2021 13:16:09 GMT; secure; HttpOnly; SameSite=None
X-Content-Type-Options: nosniff
X-Download-Options: noopen
X-Frame-Options: DENY
X-Gitlab-Feature-Category: authentication_and_authorization
X-Permitted-Cross-Domain-Policies: none
X-Request-Id: 01F7TT5YFS6AP39DT9SJXZ5DFT
X-Runtime: 0.025588
X-Ua-Compatible: IE=edge
X-Xss-Protection: 1; mode=block
Strict-Transport-Security: max-age=31536000
Referrer-Policy: strict-origin-when-cross-origin
Content-Encoding: gzip

• http://vccourses.cs.ovgu.de/.well-known/acme-challenge/check-your-website-dot-server-daten-dot-de
141.44.23.45 GZip used - 106 / 146 - 27.40 %
Inline-JavaScript (∑/total): 0/0 Inline-CSS (∑/total): 0/0
404

Html is minified: 110.61 %
0.040
A
Not Found
Visible Content: 404 Not Found nginx
Server: nginx
Date: Thu, 10 Jun 2021 11:16:03 GMT
Content-Type: text/html
Transfer-Encoding: chunked
Connection: close
Content-Encoding: gzip

• https://141.44.23.45/
141.44.23.45
302
https://141.44.23.45/users/sign_in
Html is minified: 100.00 %
2.160
N
Certificate error: RemoteCertificateNameMismatch
Server: nginx
Date: Thu, 10 Jun 2021 11:16:03 GMT
Content-Type: text/html; charset=utf-8
Content-Length: 100
Connection: close
Cache-Control: no-cache
Location: https://141.44.23.45/users/sign_in
X-Content-Type-Options: nosniff
X-Download-Options: noopen
X-Frame-Options: DENY
X-Gitlab-Feature-Category: projects
X-Permitted-Cross-Domain-Policies: none
X-Request-Id: 01F7TT5RX2032F6QMMCTDB67YD
X-Runtime: 0.009471
X-Ua-Compatible: IE=edge
X-Xss-Protection: 1; mode=block
Strict-Transport-Security: max-age=31536000
Referrer-Policy: strict-origin-when-cross-origin

• https://141.44.23.45/users/sign_in
GZip used - 13831 / 52316 - 73.56 %
Inline-JavaScript (∑/total): 3/544 Inline-CSS (∑/total): 1/43751
200

Html is minified: 665.17 %
2.177
N
Certificate error: RemoteCertificateNameMismatch
small visible content (num chars: 313)
GitLab A complete DevOps platform GitLab is a single application for the entire software development lifecycle. From project planning and source code management to CI/CD, monitoring, and security. This is a self-managed instance of GitLab. Username or email Password Remember me Forgot your password? About GitLab
Server: nginx
Date: Thu, 10 Jun 2021 11:16:12 GMT
Content-Type: text/html; charset=utf-8
Transfer-Encoding: chunked
Connection: close
Vary: Accept-Encoding
Cache-Control: max-age=0, private, must-revalidate
Etag: W/"76a2e24a712d66b4c804c3c6a532e971"
Permissions-Policy: interest-cohort=()
Set-Cookie: _gitlab_session=0d845e108f8878654fdb2ee502d7765b; path=/; expires=Thu, 10 Jun 2021 13:16:12 GMT; secure; HttpOnly; SameSite=None
X-Content-Type-Options: nosniff
X-Download-Options: noopen
X-Frame-Options: DENY
X-Gitlab-Feature-Category: authentication_and_authorization
X-Permitted-Cross-Domain-Policies: none
X-Request-Id: 01F7TT61EKSBD584S34JT55Z1K
X-Runtime: 0.032035
X-Ua-Compatible: IE=edge
X-Xss-Protection: 1; mode=block
Strict-Transport-Security: max-age=31536000
Referrer-Policy: strict-origin-when-cross-origin
Content-Encoding: gzip

7. Comments


1. General Results, most used to calculate the result

Aname "vccourses.cs.ovgu.de" is subdomain, public suffix is ".de", top-level-domain is ".de", top-level-domain-type is "country-code", Country is Germany, tld-manager is "DENIC eG", num .de-domains preloaded: 6872 (complete: 151507)
Agood: All ip addresses are public addresses
Warning: Only one ip address found: vccourses.cs.ovgu.de 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: vccourses.cs.ovgu.de 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
Ahttps://vccourses.cs.ovgu.de:443/
302
https://vccourses.cs.ovgu.de/users/sign_in
correct redirect https to https
Ahttps://vccourses.cs.ovgu.de/ 141.44.23.45
302
https://vccourses.cs.ovgu.de/users/sign_in
correct redirect https to https
Ahttps://141.44.23.45/ 141.44.23.45
302
https://141.44.23.45/users/sign_in
correct redirect https to https
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.
Agood: every cookie sent via https is marked as secure
AGood: Every cookie has a SameSite Attribute with a correct value Strict/Lax/None
Agood: every https has a Strict Transport Security Header
Agood: HSTS max-age is long enough, 31536000 seconds = 365 days
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):2 complete Content-Type - header (3 urls)
http://vccourses.cs.ovgu.de/.well-known/acme-challenge/check-your-website-dot-server-daten-dot-de 141.44.23.45


Url with incomplete Content-Type - header - missing charset
Nhttps://141.44.23.45/ 141.44.23.45
302
https://141.44.23.45/users/sign_in
Error - Certificate isn't trusted, RemoteCertificateNameMismatch
Nhttps://141.44.23.45/users/sign_in
200

Error - Certificate isn't trusted, RemoteCertificateNameMismatch
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 vccourses.cs.ovgu.de, 1 ip addresses, 1 different http results.

2. DNS- and NameServer - Checks

AInfo:: 22 Root-climbing DNS Queries required to find all IPv4- and IPv6-Addresses of 0 Name Servers.
AInfo:: 22 Queries complete, 12 with IPv6, 10 with IPv4.
Warning: Only some DNS Queries done via ipv6. IPv6 is the future, so the name servers of your name servers should have ipv6 addresses.
AInfo:: 5 different Name Servers found: luxator.cs.ovgu.de, ns.cs.ovgu.de, ns.cs.uni-magdeburg.de, ns2.cs.ovgu.de, ns2.cs.uni-magdeburg.de, 2 Name Servers included in Delegation: ns.cs.uni-magdeburg.de, ns2.cs.uni-magdeburg.de, 3 Name Servers included in 1 Zone definitions: luxator.cs.ovgu.de, ns.cs.ovgu.de, ns2.cs.ovgu.de, 1 Name Servers listed in SOA.Primary: ns.cs.ovgu.de.
AGood: Only one SOA.Primary Name Server found.: ns.cs.ovgu.de.
Error: SOA.Primary Name Server not included in the delegation set.: ns.cs.ovgu.de.
XFatal: Inconsistency between delegation and zone. The set of NS records served by the authoritative name servers must match those proposed for the delegation in the parent zone.: luxator.cs.ovgu.de (141.44.23.1): Delegation: ns.cs.uni-magdeburg.de, ns2.cs.uni-magdeburg.de, Zone: luxator.cs.ovgu.de, ns.cs.ovgu.de, ns2.cs.ovgu.de. Name Servers defined in Delegation, missing in Zone: ns.cs.uni-magdeburg.de, ns2.cs.uni-magdeburg.de.Name Servers defined in Zone, missing in Delegation: luxator.cs.ovgu.de, ns.cs.ovgu.de, ns2.cs.ovgu.de.
XFatal: Inconsistency between delegation and zone. The set of NS records served by the authoritative name servers must match those proposed for the delegation in the parent zone.: luxator.cs.ovgu.de (141.44.23.1): Delegation: ns.cs.uni-magdeburg.de, ns2.cs.uni-magdeburg.de, Zone: luxator.cs.ovgu.de, ns.cs.ovgu.de, ns2.cs.ovgu.de. Name Servers defined in Delegation, missing in Zone: ns.cs.uni-magdeburg.de, ns2.cs.uni-magdeburg.de.Name Servers defined in Zone, missing in Delegation: luxator.cs.ovgu.de, ns.cs.ovgu.de, ns2.cs.ovgu.de.
XFatal: Inconsistency between delegation and zone. The set of NS records served by the authoritative name servers must match those proposed for the delegation in the parent zone.: ns.cs.ovgu.de (141.44.21.1): Delegation: ns.cs.uni-magdeburg.de, ns2.cs.uni-magdeburg.de, Zone: luxator.cs.ovgu.de, ns.cs.ovgu.de, ns2.cs.ovgu.de. Name Servers defined in Delegation, missing in Zone: ns.cs.uni-magdeburg.de, ns2.cs.uni-magdeburg.de.Name Servers defined in Zone, missing in Delegation: luxator.cs.ovgu.de, ns.cs.ovgu.de, ns2.cs.ovgu.de.
XFatal: Inconsistency between delegation and zone. The set of NS records served by the authoritative name servers must match those proposed for the delegation in the parent zone.: ns.cs.ovgu.de (141.44.21.1): Delegation: ns.cs.uni-magdeburg.de, ns2.cs.uni-magdeburg.de, Zone: luxator.cs.ovgu.de, ns.cs.ovgu.de, ns2.cs.ovgu.de. Name Servers defined in Delegation, missing in Zone: ns.cs.uni-magdeburg.de, ns2.cs.uni-magdeburg.de.Name Servers defined in Zone, missing in Delegation: luxator.cs.ovgu.de, ns.cs.ovgu.de, ns2.cs.ovgu.de.
XFatal: Inconsistency between delegation and zone. The set of NS records served by the authoritative name servers must match those proposed for the delegation in the parent zone.: ns.cs.uni-magdeburg.de (141.44.21.1): Delegation: ns.cs.uni-magdeburg.de, ns2.cs.uni-magdeburg.de, Zone: luxator.cs.ovgu.de, ns.cs.ovgu.de, ns2.cs.ovgu.de. Name Servers defined in Delegation, missing in Zone: ns.cs.uni-magdeburg.de, ns2.cs.uni-magdeburg.de.Name Servers defined in Zone, missing in Delegation: luxator.cs.ovgu.de, ns.cs.ovgu.de, ns2.cs.ovgu.de.
XFatal: Inconsistency between delegation and zone. The set of NS records served by the authoritative name servers must match those proposed for the delegation in the parent zone.: ns.cs.uni-magdeburg.de (141.44.21.1): Delegation: ns.cs.uni-magdeburg.de, ns2.cs.uni-magdeburg.de, Zone: luxator.cs.ovgu.de, ns.cs.ovgu.de, ns2.cs.ovgu.de. Name Servers defined in Delegation, missing in Zone: ns.cs.uni-magdeburg.de, ns2.cs.uni-magdeburg.de.Name Servers defined in Zone, missing in Delegation: luxator.cs.ovgu.de, ns.cs.ovgu.de, ns2.cs.ovgu.de.
XFatal: Inconsistency between delegation and zone. The set of NS records served by the authoritative name servers must match those proposed for the delegation in the parent zone.: ns2.cs.ovgu.de (141.44.24.32): Delegation: ns.cs.uni-magdeburg.de, ns2.cs.uni-magdeburg.de, Zone: luxator.cs.ovgu.de, ns.cs.ovgu.de, ns2.cs.ovgu.de. Name Servers defined in Delegation, missing in Zone: ns.cs.uni-magdeburg.de, ns2.cs.uni-magdeburg.de.Name Servers defined in Zone, missing in Delegation: luxator.cs.ovgu.de, ns.cs.ovgu.de, ns2.cs.ovgu.de.
XFatal: Inconsistency between delegation and zone. The set of NS records served by the authoritative name servers must match those proposed for the delegation in the parent zone.: ns2.cs.ovgu.de (141.44.24.32): Delegation: ns.cs.uni-magdeburg.de, ns2.cs.uni-magdeburg.de, Zone: luxator.cs.ovgu.de, ns.cs.ovgu.de, ns2.cs.ovgu.de. Name Servers defined in Delegation, missing in Zone: ns.cs.uni-magdeburg.de, ns2.cs.uni-magdeburg.de.Name Servers defined in Zone, missing in Delegation: luxator.cs.ovgu.de, ns.cs.ovgu.de, ns2.cs.ovgu.de.
XFatal: Inconsistency between delegation and zone. The set of NS records served by the authoritative name servers must match those proposed for the delegation in the parent zone.: ns2.cs.uni-magdeburg.de (141.44.24.32): Delegation: ns.cs.uni-magdeburg.de, ns2.cs.uni-magdeburg.de, Zone: luxator.cs.ovgu.de, ns.cs.ovgu.de, ns2.cs.ovgu.de. Name Servers defined in Delegation, missing in Zone: ns.cs.uni-magdeburg.de, ns2.cs.uni-magdeburg.de.Name Servers defined in Zone, missing in Delegation: luxator.cs.ovgu.de, ns.cs.ovgu.de, ns2.cs.ovgu.de.
XFatal: Inconsistency between delegation and zone. The set of NS records served by the authoritative name servers must match those proposed for the delegation in the parent zone.: ns2.cs.uni-magdeburg.de (141.44.24.32): Delegation: ns.cs.uni-magdeburg.de, ns2.cs.uni-magdeburg.de, Zone: luxator.cs.ovgu.de, ns.cs.ovgu.de, ns2.cs.ovgu.de. Name Servers defined in Delegation, missing in Zone: ns.cs.uni-magdeburg.de, ns2.cs.uni-magdeburg.de.Name Servers defined in Zone, missing in Delegation: luxator.cs.ovgu.de, ns.cs.ovgu.de, ns2.cs.ovgu.de.
AGood: All Name Server Domain Names have a Public Suffix.
AGood: All Name Server Domain Names ending with a Public Suffix have minimal one IPv4- or IPv6 address.
AGood: All Name Server ip addresses are public.
AInfo: Ipv4-Subnet-list: 5 Name Servers, 1 different subnets (first Byte): 141., 1 different subnets (first two Bytes): 141.44., 3 different subnets (first three Bytes): 141.44.21., 141.44.23., 141.44.24.
AGood: Name Server IPv4-addresses from different subnet found:
AGood: Nameserver supports TCP connections: 10 good Nameserver
AGood: Nameserver supports Echo Capitalization: 10 good Nameserver
AGood: Nameserver supports EDNS with max. 512 Byte Udp payload, message is smaller: 10 good Nameserver
AGood: Nameserver has passed 10 EDNS-Checks (OP100, FLAGS, V1, V1OP100, V1FLAGS, DNSSEC, V1DNSSEC, NSID, COOKIE, CLIENTSUBNET): 10 good Nameserver
Nameserver doesn't pass all EDNS-Checks: ns.cs.ovgu.de: 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: ns.cs.ovgu.de: 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.

3. 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 supports GZip.
https://vccourses.cs.ovgu.de/users/sign_in
200

Warning: Https + http status 200 + Inline CSS / JavaScript found. Don't use inline CSS / JavaScript. These are compiled and re-used ressources, save these with a long Cache-Control max-age - header.
https://141.44.23.45/users/sign_in
200

Warning: Https + http status 200 + Inline CSS / JavaScript found. Don't use inline CSS / JavaScript. These are compiled and re-used ressources, save these with a long Cache-Control max-age - header.
https://vccourses.cs.ovgu.de/users/sign_in
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://141.44.23.45/users/sign_in
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.
AGood: Every https connection via port 443 supports the http/2 protocol via ALPN.
AGood: All script Elements (type text/javascript) and src-Attribute have a defer / async - Attribute. So loading and executing these JavaScripts doesn't block parsing and rendering the Html-Output.
AGood: All CSS / JavaScript files are sent with GZip. That reduces the content of the files. 8 external CSS / JavaScript files found
Warning: CSS / JavaScript files with a missing or too short Cache-Control header found. Browsers should cache and re-use these files. 8 external CSS / JavaScript files without Cache-Control-Header, 8 with Cache-Control, but no max-age, 0 with Cache-Control max-age too short (minimum 7 days), 0 with Cache-Control long enough, 16 complete.
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
ADuration: 116610 milliseconds, 116.610 seconds


8. Connections

DomainIPPortCert.ProtocolKeyExchangeStrengthCipherStrengthHashAlgorithmOCSP stapling
Domain/KeyExchangeIP/StrengthPort/CipherCert./StrengthProtocol/HashAlgorithmOCSP stapling
vccourses.cs.ovgu.de
vccourses.cs.ovgu.de
443
ok
Tls12
ECDH Ephermal
255
Aes256
256
Sha384
error checking OCSP stapling
ok
vccourses.cs.ovgu.de
vccourses.cs.ovgu.de
443
ok
Tls12

ECDH Ephermal
255
Aes256
256
Sha384
error checking OCSP stapling
ok
http/2 via ALPN supported 
Tls.1.2
no Tls.1.1
no Tls.1.0
http/2 via ALPN supported
Tls.1.2
no Tls.1.1
no Tls.1.0
Chain (complete)
1CN=vccourses.cs.ovgu.de

2CN=R3, O=Let's Encrypt, C=US

3CN=ISRG Root X1, O=Internet Security Research Group, C=US


vccourses.cs.ovgu.de
141.44.23.45
443
ok
Tls12
ECDH Ephermal
255
Aes256
256
Sha384
error checking OCSP stapling
ok

vccourses.cs.ovgu.de
141.44.23.45
443
ok
Tls12

ECDH Ephermal
255
Aes256
256
Sha384
error checking OCSP stapling
ok
http/2 via ALPN supported 
No SNI required - domain included in main certificate
Tls.1.2
no Tls.1.1
no Tls.1.0
http/2 via ALPN supported
No SNI required - domain included in main certificate
Tls.1.2
no Tls.1.1
no Tls.1.0
Chain (complete)
1CN=vccourses.cs.ovgu.de

2CN=R3, O=Let's Encrypt, C=US

3CN=ISRG Root X1, O=Internet Security Research Group, C=US


141.44.23.45
141.44.23.45
443
name does not match
Tls12
ECDH Ephermal
255
Aes256
256
Sha384
error checking OCSP stapling
ok

141.44.23.45
141.44.23.45
443
name does not match
Tls12

ECDH Ephermal
255
Aes256
256
Sha384
error checking OCSP stapling
ok
http/2 via ALPN supported 
Cert sent without SNI
Tls.1.2
no Tls.1.1
no Tls.1.0
http/2 via ALPN supported
Cert sent without SNI
Tls.1.2
no Tls.1.1
no Tls.1.0
Chain (complete)
1CN=vccourses.cs.ovgu.de

2CN=R3, O=Let's Encrypt, C=US

3CN=ISRG Root X1, O=Internet Security Research Group, C=US


141.44.23.45
141.44.23.45
443
name does not match
Tls12
ECDH Ephermal
255
Aes256
256
Sha384
error checking OCSP stapling
ok

141.44.23.45
141.44.23.45
443
name does not match
Tls12

ECDH Ephermal
255
Aes256
256
Sha384
error checking OCSP stapling
ok
http/2 via ALPN supported 
Cert sent without SNI
Tls.1.2
no Tls.1.1
no Tls.1.0
http/2 via ALPN supported
Cert sent without SNI
Tls.1.2
no Tls.1.1
no Tls.1.0
Chain (complete)
1CN=vccourses.cs.ovgu.de

2CN=R3, O=Let's Encrypt, C=US

3CN=ISRG Root X1, O=Internet Security Research Group, C=US


9. Certificates

1.
1.
CN=vccourses.cs.ovgu.de
10.06.2021
08.09.2021
expires in 77 days
vccourses.cs.ovgu.de - 1 entry
1.
1.
CN=vccourses.cs.ovgu.de
10.06.2021

08.09.2021
expires in 77 days
vccourses.cs.ovgu.de - 1 entry

KeyalgorithmRSA encryption (2048 bit)
Signatur:SHA256 With RSA-Encryption
Serial Number:03672D2C89693BC14B71EDA8950418458D9A
Thumbprint:72EA0E43A6EB09728B8B97694414D7C696F74055
SHA256 / Certificate:guojfZlMHIU9dhJ2Qx3seindSvM09r62AaYmbVJB/i0=
SHA256 hex / Cert (DANE * 0 1):e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855
SHA256 hex / PublicKey (DANE * 1 1):9216bcda46565751e69012fbc2dd2b13fb1cc457e80dc6ab59d4d52e6e876ff2
SHA256 hex / Subject Public Key Information (SPKI):cf059325e32446ea57eeebdc5434c2d9c9f5872b410d4ccad077cdc8bbfec3f2
SPKI checked via https://v1.pwnedkeys.com/spki-hash:Good: Key isn't compromised
OCSP - Url:http://r3.o.lencr.org
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=vccourses.cs.ovgu.de
10.06.2021
08.09.2021
expires in 77 days
vccourses.cs.ovgu.de - 1 entry

2.
CN=vccourses.cs.ovgu.de
10.06.2021

08.09.2021
expires in 77 days
vccourses.cs.ovgu.de - 1 entry

KeyalgorithmRSA encryption (2048 bit)
Signatur:SHA256 With RSA-Encryption
Serial Number:03672D2C89693BC14B71EDA8950418458D9A
Thumbprint:72EA0E43A6EB09728B8B97694414D7C696F74055
SHA256 / Certificate:guojfZlMHIU9dhJ2Qx3seindSvM09r62AaYmbVJB/i0=
SHA256 hex / Cert (DANE * 0 1):e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855
SHA256 hex / PublicKey (DANE * 1 1):9216bcda46565751e69012fbc2dd2b13fb1cc457e80dc6ab59d4d52e6e876ff2
SHA256 hex / Subject Public Key Information (SPKI):cf059325e32446ea57eeebdc5434c2d9c9f5872b410d4ccad077cdc8bbfec3f2
SPKI checked via https://v1.pwnedkeys.com/spki-hash:Good: Key isn't compromised
OCSP - Url:http://r3.o.lencr.org
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=R3, O=Let's Encrypt, C=US
04.09.2020
15.09.2025
expires in 1545 days


3.
CN=R3, O=Let's Encrypt, C=US
04.09.2020

15.09.2025
expires in 1545 days


KeyalgorithmRSA encryption (2048 bit)
Signatur:SHA256 With RSA-Encryption
Serial Number:00912B084ACF0C18A753F6D62E25A75F5A
Thumbprint:A053375BFE84E8B748782C7CEE15827A6AF5A405
SHA256 / Certificate:Z63RFmsCCuYbj1/JaBPATCqliZYHloZVcqPH5zdhPf0=
SHA256 hex / Cert (DANE * 0 1):e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855
SHA256 hex / PublicKey (DANE * 1 1):8d02536c887482bc34ff54e41d2ba659bf85b341a0a20afadb5813dcfbcf286d
SHA256 hex / Subject Public Key Information (SPKI):
SPKI checked via https://v1.pwnedkeys.com/spki-hash:Check unknown. No result 404 / 200
OCSP - Url:
OCSP - must staple:no
Certificate Transparency:no
Enhanced Key Usage:Clientauthentifizierung (1.3.6.1.5.5.7.3.2), Serverauthentifizierung (1.3.6.1.5.5.7.3.1)


4.
CN=R3, O=Let's Encrypt, C=US
04.09.2020
15.09.2025
expires in 1545 days


4.
CN=R3, O=Let's Encrypt, C=US
04.09.2020

15.09.2025
expires in 1545 days


KeyalgorithmRSA encryption (2048 bit)
Signatur:SHA256 With RSA-Encryption
Serial Number:00912B084ACF0C18A753F6D62E25A75F5A
Thumbprint:A053375BFE84E8B748782C7CEE15827A6AF5A405
SHA256 / Certificate:Z63RFmsCCuYbj1/JaBPATCqliZYHloZVcqPH5zdhPf0=
SHA256 hex / Cert (DANE * 0 1):e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855
SHA256 hex / PublicKey (DANE * 1 1):8d02536c887482bc34ff54e41d2ba659bf85b341a0a20afadb5813dcfbcf286d
SHA256 hex / Subject Public Key Information (SPKI):
SPKI checked via https://v1.pwnedkeys.com/spki-hash:Check unknown. No result 404 / 200
OCSP - Url:
OCSP - must staple:no
Certificate Transparency:no
Enhanced Key Usage:Clientauthentifizierung (1.3.6.1.5.5.7.3.2), Serverauthentifizierung (1.3.6.1.5.5.7.3.1)


5.
CN=ISRG Root X1, O=Internet Security Research Group, C=US
20.01.2021
30.09.2024
expires in 1195 days


5.
CN=ISRG Root X1, O=Internet Security Research Group, C=US
20.01.2021

30.09.2024
expires in 1195 days


KeyalgorithmRSA encryption (4096 bit)
Signatur:SHA256 With RSA-Encryption
Serial Number:4001772137D4E942B8EE76AA3C640AB7
Thumbprint:933C6DDEE95C9C41A40F9F50493D82BE03AD87BF
SHA256 / Certificate:bZn7Jl6xxbN0R2X8vGSPPNjhv/r9xML5m51Hz3/xwk8=
SHA256 hex / Cert (DANE * 0 1):e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855
SHA256 hex / PublicKey (DANE * 1 1):0b9fa5a59eed715c26c1020c711b4f6ec42d58b0015e14337a39dad301c5afc3
SHA256 hex / Subject Public Key Information (SPKI):
SPKI checked via https://v1.pwnedkeys.com/spki-hash:Check unknown. No result 404 / 200
OCSP - Url:
OCSP - must staple:no
Certificate Transparency:no
Enhanced Key Usage:


6.
CN=ISRG Root X1, O=Internet Security Research Group, C=US
04.06.2015
04.06.2035
expires in 5094 days


6.
CN=ISRG Root X1, O=Internet Security Research Group, C=US
04.06.2015

04.06.2035
expires in 5094 days


KeyalgorithmRSA encryption (4096 bit)
Signatur:SHA256 With RSA-Encryption
Serial Number:008210CFB0D240E3594463E0BB63828B00
Thumbprint:CABD2A79A1076A31F21D253635CB039D4329A5E8
SHA256 / Certificate:lrzsBiZJdvN0YHeazyjFp8/oo8Cq4RqP/O4FwL3fCMY=
SHA256 hex / Cert (DANE * 0 1):96bcec06264976f37460779acf28c5a7cfe8a3c0aae11a8ffcee05c0bddf08c6
SHA256 hex / PublicKey (DANE * 1 1):0b9fa5a59eed715c26c1020c711b4f6ec42d58b0015e14337a39dad301c5afc3
SHA256 hex / Subject Public Key Information (SPKI):e08f5907885b2cdda941938dde3ce12cc4a121e362bb95aa124d4ee3385c998f
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:



7.
CN=DST Root CA X3, O=Digital Signature Trust Co.
30.09.2000
30.09.2021
expires in 99 days


7.
CN=DST Root CA X3, O=Digital Signature Trust Co.
30.09.2000

30.09.2021
expires in 99 days


KeyalgorithmRSA encryption (2048 bit)
Signatur:SHA-1 with RSA Encryption
Serial Number:44AFB080D6A327BA893039862EF8406B
Thumbprint:DAC9024F54D8F6DF94935FB1732638CA6AD77C13
SHA256 / Certificate:BocmAzGnJAPZCfEF5pvPDTLhvSST/8bZIG0RvNZ3Bzk=
SHA256 hex / Cert (DANE * 0 1):0687260331a72403d909f105e69bcf0d32e1bd2493ffc6d9206d11bcd6770739
SHA256 hex / PublicKey (DANE * 1 1):563b3caf8cfef34c2335caf560a7a95906e8488462eb75ac59784830df9e5b2b
SHA256 hex / Subject Public Key Information (SPKI):29cc40db5e2de462a311cbbafaa1dc466960002335ecdf3317f2cd05c1d0bedf
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)

Issuerlast 7 daysactivenum Certs
CN=R3, O=Let's Encrypt, C=US
0
1
2
CN=DFN-Verein Global Issuing CA, OU=DFN-PKI, O=Verein zur Foerderung eines Deutschen Forschungsnetzes e. V., C=DE
0
1
1

CertSpotter-IdIssuernot beforenot afterDomain namesLE-Duplicatenext LE
2616794766
leaf cert
CN=R3, O=Let's Encrypt, C=US
2021-06-10 06:41:41
2021-09-08 06:41:40
vccourses.cs.ovgu.de - 1 entries


2390535676
leaf cert
CN=R3, O=Let's Encrypt, C=US
2021-03-22 08:40:59
2021-06-20 08:40:59
aud.vc.cs.ovgu.de, aud.vc.cs.uni-magdeburg.de, cagd.cs.ovgu.de, cagd.cs.uni-magdeburg.de, cg.vc.cs.ovgu.de, cg.vc.cs.uni-magdeburg.de, einfinf.vc.cs.ovgu.de, einfinf.vc.cs.uni-magdeburg.de, pages.vc.cs.ovgu.de, pages.vc.cs.uni-magdeburg.de, vccourses.cs.ovgu.de, vccourses.cs.uni-magdeburg.de, vcxx.cs.ovgu.de, vcxx.cs.uni-magdeburg.de - 14 entries


971751270
leaf cert
CN=DFN-Verein Global Issuing CA, OU=DFN-PKI, O=Verein zur Foerderung eines Deutschen Forschungsnetzes e. V., C=DE
2019-06-17 14:56:19
2021-09-18 14:56:19
vccourses.cs.ovgu.de - 1 entries



2. Source crt.sh - old and new certificates, sometimes very slow - only certificates with "not after" > 2019 are listed

Issuerlast 7 daysactivenum Certs
CN=Let's Encrypt Authority X3, O=Let's Encrypt, C=US
0 /0 new
0
4
CN=R3, O=Let's Encrypt, C=US
0 /0 new
1
3
CN=DFN-Verein Global Issuing CA, OU=DFN-PKI, O=Verein zur Foerderung eines Deutschen Forschungsnetzes e. V., C=DE
0
1
1

CRT-IdIssuernot beforenot afterDomain namesLE-Duplicatenext LE
4677005648
leaf cert
CN=R3, O=Let's Encrypt, C=US
2021-06-10 04:41:41
2021-09-08 04:41:40
vccourses.cs.ovgu.de
1 entries


4254591882
leaf cert
CN=R3, O=Let's Encrypt, C=US
2021-03-22 07:40:59
2021-06-20 06:40:59
aud.vc.cs.ovgu.de, aud.vc.cs.uni-magdeburg.de, cagd.cs.ovgu.de, cagd.cs.uni-magdeburg.de, cg.vc.cs.ovgu.de, cg.vc.cs.uni-magdeburg.de, einfinf.vc.cs.ovgu.de, einfinf.vc.cs.uni-magdeburg.de, pages.vc.cs.ovgu.de, pages.vc.cs.uni-magdeburg.de, vccourses.cs.ovgu.de, vccourses.cs.uni-magdeburg.de, vcxx.cs.ovgu.de, vcxx.cs.uni-magdeburg.de
14 entries


3815324513
leaf cert
CN=R3, O=Let's Encrypt, C=US
2020-12-22 08:15:46
2021-03-22 08:15:46
aud.vc.cs.ovgu.de, aud.vc.cs.uni-magdeburg.de, cagd.cs.ovgu.de, cagd.cs.uni-magdeburg.de, cg.vc.cs.ovgu.de, cg.vc.cs.uni-magdeburg.de, einfinf.vc.cs.ovgu.de, einfinf.vc.cs.uni-magdeburg.de, pages.vc.cs.ovgu.de, pages.vc.cs.uni-magdeburg.de, vccourses.cs.ovgu.de, vccourses.cs.uni-magdeburg.de, vcxx.cs.ovgu.de, vcxx.cs.uni-magdeburg.de
14 entries


3447809933
leaf cert
CN=Let's Encrypt Authority X3, O=Let's Encrypt, C=US
2020-09-30 05:57:05
2020-12-29 06:57:05
aud.vc.cs.ovgu.de, aud.vc.cs.uni-magdeburg.de, cg.vc.cs.ovgu.de, cg.vc.cs.uni-magdeburg.de, einfinf.vc.cs.ovgu.de, einfinf.vc.cs.uni-magdeburg.de, pages.vc.cs.ovgu.de, pages.vc.cs.uni-magdeburg.de, vccourses.cs.ovgu.de, vccourses.cs.uni-magdeburg.de, vcxx.cs.ovgu.de, vcxx.cs.uni-magdeburg.de
12 entries


3019705057
leaf cert
CN=Let's Encrypt Authority X3, O=Let's Encrypt, C=US
2020-06-30 10:49:27
2020-09-28 10:49:27
aud.vc.cs.ovgu.de, aud.vc.cs.uni-magdeburg.de, cg.vc.cs.ovgu.de, cg.vc.cs.uni-magdeburg.de, einfinf.vc.cs.ovgu.de, einfinf.vc.cs.uni-magdeburg.de, pages.vc.cs.ovgu.de, pages.vc.cs.uni-magdeburg.de, vccourses.cs.ovgu.de, vccourses.cs.uni-magdeburg.de, vcxx.cs.ovgu.de, vcxx.cs.uni-magdeburg.de
12 entries


2655685961
leaf cert
CN=Let's Encrypt Authority X3, O=Let's Encrypt, C=US
2020-04-01 13:46:27
2020-06-30 13:46:27
aud.vc.cs.ovgu.de, aud.vc.cs.uni-magdeburg.de, cg.vc.cs.ovgu.de, cg.vc.cs.uni-magdeburg.de, einfinf.vc.cs.ovgu.de, einfinf.vc.cs.uni-magdeburg.de, pages.vc.cs.ovgu.de, pages.vc.cs.uni-magdeburg.de, vccourses.cs.ovgu.de, vccourses.cs.uni-magdeburg.de, vcxx.cs.ovgu.de, vcxx.cs.uni-magdeburg.de
12 entries


2598111705
leaf cert
CN=Let's Encrypt Authority X3, O=Let's Encrypt, C=US
2020-03-18 20:06:08
2020-06-16 19:06:08
aud.vc.cs.ovgu.de, aud.vc.cs.uni-magdeburg.de, einfinf.vc.cs.ovgu.de, einfinf.vc.cs.uni-magdeburg.de, pages.vc.cs.ovgu.de, pages.vc.cs.uni-magdeburg.de, vccourses.cs.ovgu.de, vccourses.cs.uni-magdeburg.de, vcxx.cs.ovgu.de, vcxx.cs.uni-magdeburg.de
10 entries


1671062962
leaf cert
CN=DFN-Verein Global Issuing CA, OU=DFN-PKI, O=Verein zur Foerderung eines Deutschen Forschungsnetzes e. V., C=DE
2019-06-17 12:56:19
2021-09-18 12:56:19
vccourses.cs.ovgu.de
1 entries



11. Html-Content - Entries

Summary

Subresource Integrity (SRI)
DomainnameHtmlElementrel/property∑ size∑ problems∑ int.∑ ext.∑ Origin poss.∑ SRI ParseErrors∑ SRI valid∑ SRI missing
https://vccourses.cs.ovgu.de/users/sign_in
a

2

0


0
0
0


form

1

0
1
0
0
0
0


link
stylesheet
3
1,481 Bytes
0
3
0
0
0
0


link
other
9
17,394 Bytes
0
8
0
0
0
0


meta
og
8
3,616 Bytes
0
2
0
0
0
0


meta
other
14
4,328 Bytes
0
1
0
0
0
0


script

5

0
5
0
0
0
0

https://141.44.23.45/users/sign_in
a

2

0


0
0
0


form

1

0


0
0
0


link
stylesheet
3

0


0
0
0


link
other
9

0


0
0
0


meta
og
8

0


0
0
0


meta
other
14

0


0
0
0


script

5

0


0
0
0

Details

DomainnameHtml-Elementname/equiv/ property/relhref/src/contentHttpStatusmsgStatus
https://vccourses.cs.ovgu.de/users/sign_in

a

/users/password/new


1
ok








a

https://about.gitlab.com/


1
ok








form
post
/users/sign_in
200

1
ok
text/html; charset=utf-8, X-Content-Type-Options nosniff found

13835 Bytes






link
apple-touch-icon
/assets/touch-icon-ipad-a6eec6aeb9da138e507593b464fdac213047e49d3093fc30e90d9a995df83ba3.png
200

1
ok
image/png, X-Content-Type-Options nosniff found

Cache-Control: public - max-age missing.
No GZip - 2465 Bytes






link
apple-touch-icon
/assets/touch-icon-ipad-retina-8ebe416f5313483d9c1bc772b5bbe03ecad52a54eba443e5215a22caed2a16a2.png
200

1
ok
image/png, X-Content-Type-Options nosniff found

Cache-Control: public - max-age missing.
No GZip - 5662 Bytes






link
apple-touch-icon
/assets/touch-icon-iphone-5a9cee0e8a51212e70b90c87c12f382c428870c0ff67d1eb034d884b78d2dae7.png
200

1
ok
image/png, X-Content-Type-Options nosniff found

Cache-Control: public - max-age missing.
No GZip - 1949 Bytes






link
apple-touch-icon
/assets/touch-icon-iphone-retina-72e2aadf86513a56e050e7f0f2355deaa19cc17ed97bbe5147847f2748e5a3e3.png
200

1
ok
image/png, X-Content-Type-Options nosniff found

Cache-Control: public - max-age missing.
No GZip - 3460 Bytes






link
mask-icon
/assets/logo-d36b5212042cebc89b96df4bf6ac24e43db316143e89926c0db839ff694d2de4.svg
200

1
ok
image/svg+xml, X-Content-Type-Options nosniff found

Cache-Control: public - max-age missing.
GZip: 766/2475 Bytes






link
preload
https://vccourses.cs.ovgu.de/assets/application-2cb8d6d6d17f1b1b8492581de92356755b864cbb6e48347a65baa2771a10ae4f.css
200

1
ok
text/css; charset=utf-8, X-Content-Type-Options nosniff found

122287 Bytes






link
preload
https://vccourses.cs.ovgu.de/assets/highlight/themes/white-23255bab077a3cc8d17b4b7004aa866e340b0009c7897b509b5d0086710b698f.css
200

1
ok
text/css; charset=utf-8, X-Content-Type-Options nosniff found

1481 Bytes






link
search
/search/opensearch.xml


1
ok








link
shortcut icon
/assets/favicon-7901bd695fb93edb07975966062049829afb56cf11511236e61bcf425070e36e.png
200

1
ok
image/png, X-Content-Type-Options nosniff found

Cache-Control: public - max-age missing.
No GZip - 1611 Bytes






link
stylesheet
/assets/application_utilities-347ed6255ee2886ac1af88a725fccf5a9211e7a193e52c747967e31ccfd7427c.css
200

1
ok
text/css; charset=utf-8, X-Content-Type-Options nosniff found

Cache-Control: public - max-age missing.
GZip: 13149/87993 Bytes




local SRI possible, possible hash-values:

sha256-NH7WJV7iiGrBr4inJfzPWpIR56GT5Sx0eWfjHM/XQnw=
sha384-rC1NYwVfq5JiguJOD/v4f091a/9DdlB6W+HdL1DdFwbTgnypMX7t5YyHIa47AAps
sha512-3Tpjlm0q9raeHKk+MCdaTwCpGwGoWojVusxK59R/O//4kKA/BSLIvBXkusMo0xkIOBgsmPJTfEZf0XedGoQkKg==

<link rel="stylesheet" href="/assets/application_utilities-347ed6255ee2886ac1af88a725fccf5a9211e7a193e52c747967e31ccfd7427c.css" crossorigin="anonymous" integrity="sha256-NH7WJV7iiGrBr4inJfzPWpIR56GT5Sx0eWfjHM/XQnw=" />



Content loaded via url("...")

data:image/svg+xml;utf8,<svg viewBox="0 0 16 16" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink"><path fill-rule="evenodd" d="M10.707 7.293a1 1 0 0 1 0 1.414l-3 3a1 1 0 0 1-1.414-1.414L8.586 8 6.293 5.707a1 1 0 0 1 1.414-1.414l3 3z"/></svg>2
data:image/svg+xml;utf8,<svg viewBox="0 0 16 16" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink"><path fill-rule="evenodd" d="M5.293 7.293a1 1 0 0 0 0 1.414l3 3a1 1 0 0 0 1.414-1.414L7.414 8l2.293-2.293a1 1 0 0 0-1.414-1.414l-3 3z"/></svg>2
data:image/svg+xml;utf8,<svg viewBox="0 0 16 16" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink"><path fill-rule="evenodd" d="M7.293 10.707a1 1 0 0 0 1.414 0l3-3a1 1 0 0 0-1.414-1.414L8 8.586 5.707 6.293a1 1 0 0 0-1.414 1.414l3 3z"/></svg>6

link
stylesheet
/assets/application-2cb8d6d6d17f1b1b8492581de92356755b864cbb6e48347a65baa2771a10ae4f.css
200

1
ok
text/css; charset=utf-8, X-Content-Type-Options nosniff found

Cache-Control: public - max-age missing.
GZip: 122287/762079 Bytes




local SRI possible, possible hash-values:

sha256-Yk21WrkJU9+Qa2BlvZhfrPBLvtOsdgl5NpYYbGYfH6c=
sha384-iYBgh6qWmBn1OLh/DQVUEJgi/8T6UYJ04tSjupbov6mMwcEpj+K5Kn+M3OXqHory
sha512-1KHRkK/lTUD7kU+ud4aasKp3B7a/YFFQ+CoCHZed8OSElSHjhmw2TsoGgfi4Xrwhg/wm6ogueH4ZDBRHjq5IiA==

<link rel="stylesheet" href="/assets/application-2cb8d6d6d17f1b1b8492581de92356755b864cbb6e48347a65baa2771a10ae4f.css" crossorigin="anonymous" integrity="sha256-Yk21WrkJU9+Qa2BlvZhfrPBLvtOsdgl5NpYYbGYfH6c=" />



Content loaded via url("...")

./checkmark-10859545577c4790e4fc67ed0a112cedc0af8260b6d24a500d70ef5a01737b2e.png2
./icon_anchor-297aa9b0225eff3d6d0da74ce042a0ed5575b92aa66b7109a5e060a795b42e36.svg2
./icons-stacked-9975d655f40beb7bb54630c9aea2e4ee695d800bd4fc9acc6ff443affe7bccbb.svg#comment2
./icons-stacked-9975d655f40beb7bb54630c9aea2e4ee695d800bd4fc9acc6ff443affe7bccbb.svg#link2
./illustrations/image_comment_light_cursor@2x-6eb274d388a8bbdbdaeee008afc79ef9dab89fb7d5409cd08739ae08059a3ce4.svg2
./illustrations/image_comment_light_cursor-c587347a929a56f8b4d78d991607598f69daef0bcc58e972cabcb72ed96663d2.svg3
./onion_skin_sprites-5c13bf92d3d6bdf19bba75b00fee5b492a43bec51bf78a01ba158b0ad099a48b.gif4
./swipemode_sprites-522fecbb380f3edfa9b09006e88a51fbcb5c26d95dba87d2e09a363a863cd4e4.gif2
data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAABQAAAAeCAYAAAAsEj5rAAAAU0lEQVR42u3VOwoAMAgE0dwfAnNjU26bYkBCFGwfiL9VVWoO+BJ4Gf3gtsEKKoFBNTCoCAYVwaAiGNQGMUHMkjGbgjk2mIONuXo0nC8XnCf1JXgArVIZAQh5TKYAAAAASUVORK5CYII=1
data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAABQAAAAeCAYAAAAsEj5rAAAAUklEQVR42u3VMQoAIBADQf8Pgj+OD9hG2CtONJB2ymQkKe0HbwAP0xucDiQWARITIDEBEnMgMQ8S8+AqBIl6kKgHiXqQqAeJepBo/z38J/U0uAHlaBkBl9I4GwAAAABJRU5ErkJggg==1
data:image/png;base64,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
data:image/svg+xml, %3csvg xmlns="http://www.w3.org/2000/svg" width="24" height="24" viewBox="4 0 8 16"%3e %3cpath style="fill: %23666;" fill-rule="evenodd" d="M11.707085,11.7071 L7.999975,15.4142 L4.292875,11.7071 C3.902375,11.3166 3.902375, 10.6834 4.292875,10.2929 C4.683375,9.90237 5.316575,9.90237 5.707075,10.2929 L6.999975, 11.5858 L6.999975,2 C6.999975,1.44771 7.447695,1 7.999975,1 C8.552255,1 8.999975,1.44771 8.999975,2 L8.999975,11.5858 L10.292865,10.2929 C10.683395 ,9.90237 11.316555,9.90237 11.707085,10.2929 C12.097605,10.6834 12.097605,11.3166 11.707085,11.7071 Z"/%3e %3c/svg%3e1
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meta
og:description
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og:image
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64


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meta
og:image:width
64


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meta
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Sign in


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meta
og:url
https://vccourses.cs.ovgu.de/users/sign_in
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summary


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meta
csrf-token
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script
src
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Cache-Control: public - max-age missing.
GZip: 8610/28435 Bytes




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script
src
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Cache-Control: public - max-age missing.
GZip: 4949/12452 Bytes




local SRI possible, possible hash-values:

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script
src
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Cache-Control: public - max-age missing.
GZip: 227003/706412 Bytes




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script
src
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Cache-Control: public - max-age missing.
GZip: 3865/14012 Bytes




local SRI possible, possible hash-values:

sha256-4dFAkSqSOmtx2r5/EB8uU+PgU0usiN425+IUfgvU6/w=
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script
src
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1
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Cache-Control: public - max-age missing.
GZip: 3435/7151 Bytes




local SRI possible, possible hash-values:

sha256-xkSznD3oAnEYwnBochlc/wiUqfhR6vqTfQF9YdijJUQ=
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https://141.44.23.45/users/sign_in

a

/users/password/new


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a

https://about.gitlab.com/


1
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form
post
/users/sign_in


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link
apple-touch-icon
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ok








link
apple-touch-icon
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link
apple-touch-icon
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link
apple-touch-icon
/assets/touch-icon-iphone-retina-72e2aadf86513a56e050e7f0f2355deaa19cc17ed97bbe5147847f2748e5a3e3.png


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link
mask-icon
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link
preload
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link
preload
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link
search
/search/opensearch.xml


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shortcut icon
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stylesheet
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meta
og:description
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meta
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meta
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meta
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meta
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meta
description
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meta
msapplication-TileColor
#30353E


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meta
msapplication-TileImage
/assets/msapplication-tile-1196ec67452f618d39cdd85e2e3a542f76574c071051ae7effbfde01710eb17d.png


1
ok








meta
theme-color
#474D57


1
ok








meta
viewport
width=device-width, initial-scale=1, maximum-scale=1


1
ok








script
src
/assets/webpack/commons-pages.admin.sessions-pages.ldap.omniauth_callbacks-pages.omniauth_callbacks-pages.profiles.t-f04c18ab.d8ea6e75.chunk.js


1
ok
defer attribute found








script
src
/assets/webpack/commons-pages.admin.sessions-pages.sessions-pages.sessions.new.acfa2ab8.chunk.js


1
ok
defer attribute found








script
src
/assets/webpack/main.a92e72ff.chunk.js


1
ok
defer attribute found








script
src
/assets/webpack/pages.sessions.new.635e692d.chunk.js


1
ok
defer attribute found








script
src
/assets/webpack/runtime.d5f03322.bundle.js


1
ok
defer attribute found








12. Nameserver - IP-Adresses

Required Root-climbing DNS-Queries to find ip addresses of all Name Servers: luxator.cs.ovgu.de, ns.cs.ovgu.de, ns.cs.uni-magdeburg.de, ns2.cs.ovgu.de, ns2.cs.uni-magdeburg.de

QNr.DomainTypeNS used
1
de
NS
h.root-servers.net (2001:500:1::53)

Answer: a.nic.de, f.nic.de, l.de.net, n.de.net, s.de.net, z.nic.de
2
luxator.cs.ovgu.de
NS
a.nic.de (2001:678:2::53)

Answer: dfnserv1.urz.uni-magdeburg.de, dfnserv2.urz.uni-magdeburg.de, dns-2.dfn.de, dns-3.dfn.de

Answer: dfnserv1.urz.uni-magdeburg.de
141.44.1.1

Answer: dfnserv2.urz.uni-magdeburg.de
141.44.1.2
3
ns.cs.ovgu.de
NS
a.nic.de (2001:678:2::53)

Answer: dfnserv1.urz.uni-magdeburg.de, dfnserv2.urz.uni-magdeburg.de, dns-2.dfn.de, dns-3.dfn.de

Answer: dfnserv1.urz.uni-magdeburg.de
141.44.1.1

Answer: dfnserv2.urz.uni-magdeburg.de
141.44.1.2
4
ns.cs.uni-magdeburg.de
NS
a.nic.de (2001:678:2::53)

Answer: dfnserv1.urz.uni-magdeburg.de, dfnserv2.urz.uni-magdeburg.de, dns-2.dfn.de, dns-3.dfn.de

Answer: dfnserv1.urz.uni-magdeburg.de
141.44.1.1

Answer: dfnserv2.urz.uni-magdeburg.de
141.44.1.2
5
ns2.cs.ovgu.de
NS
a.nic.de (2001:678:2::53)

Answer: dfnserv1.urz.uni-magdeburg.de, dfnserv2.urz.uni-magdeburg.de, dns-2.dfn.de, dns-3.dfn.de

Answer: dfnserv1.urz.uni-magdeburg.de
141.44.1.1

Answer: dfnserv2.urz.uni-magdeburg.de
141.44.1.2
6
ns2.cs.uni-magdeburg.de
NS
a.nic.de (2001:678:2::53)

Answer: dfnserv1.urz.uni-magdeburg.de, dfnserv2.urz.uni-magdeburg.de, dns-2.dfn.de, dns-3.dfn.de

Answer: dfnserv1.urz.uni-magdeburg.de
141.44.1.1

Answer: dfnserv2.urz.uni-magdeburg.de
141.44.1.2
7
dns-2.dfn.de
NS
a.nic.de (2001:678:2::53)

Answer: ns1.dfn.de, ns2.dfn.de, ns3.dfn.de

Answer: ns1.dfn.de
194.95.236.51, 2001:638:d:c110::51

Answer: ns2.dfn.de
194.95.236.59, 2001:638:d:c111::59

Answer: ns3.dfn.de
194.95.236.67
8
dns-3.dfn.de
NS
a.nic.de (2001:678:2::53)

Answer: ns1.dfn.de, ns2.dfn.de, ns3.dfn.de

Answer: ns1.dfn.de
194.95.236.51, 2001:638:d:c110::51

Answer: ns2.dfn.de
194.95.236.59, 2001:638:d:c111::59

Answer: ns3.dfn.de
194.95.236.67
9
dns-2.dfn.de: 193.174.75.54
A
ns1.dfn.de (2001:638:d:c110::51)
10
dns-2.dfn.de: 2001:638:d:b102::1
AAAA
ns1.dfn.de (2001:638:d:c110::51)
11
dns-3.dfn.de: 193.174.75.58
A
ns1.dfn.de (2001:638:d:c110::51)
12
dns-3.dfn.de: 2001:638:d:b103::1
AAAA
ns1.dfn.de (2001:638:d:c110::51)
13
luxator.cs.ovgu.de: No A record found
A
dfnserv1.urz.uni-magdeburg.de (141.44.1.1)
14
luxator.cs.ovgu.de: No AAAA record found
AAAA
dfnserv1.urz.uni-magdeburg.de (141.44.1.1)
15
ns.cs.ovgu.de: No A record found
A
dfnserv1.urz.uni-magdeburg.de (141.44.1.1)
16
ns.cs.ovgu.de: No AAAA record found
AAAA
dfnserv1.urz.uni-magdeburg.de (141.44.1.1)
17
ns.cs.uni-magdeburg.de: No A record found
A
dfnserv1.urz.uni-magdeburg.de (141.44.1.1)
18
ns.cs.uni-magdeburg.de: No AAAA record found
AAAA
dfnserv1.urz.uni-magdeburg.de (141.44.1.1)
19
ns2.cs.ovgu.de: No A record found
A
dfnserv1.urz.uni-magdeburg.de (141.44.1.1)
20
ns2.cs.ovgu.de: No AAAA record found
AAAA
dfnserv1.urz.uni-magdeburg.de (141.44.1.1)
21
ns2.cs.uni-magdeburg.de: No A record found
A
dfnserv1.urz.uni-magdeburg.de (141.44.1.1)
22
ns2.cs.uni-magdeburg.de: No AAAA record found
AAAA
dfnserv1.urz.uni-magdeburg.de (141.44.1.1)


13. CAA - Entries

DomainnameflagNameValue∑ Queries∑ Timeout
vccourses2.cs.ovgu.de
0

no CAA entry found
1
0
vccourses.cs.ovgu.de



1
0
cs.ovgu.de
0

no CAA entry found
1
0

0

no CAA entry found
1
0
ovgu.de
0

no CAA entry found
1
0

0

no CAA entry found
1
0
de
0

no CAA entry found
1
0

0

no CAA entry found
1
0


14. TXT - Entries

DomainnameTXT EntryStatus∑ Queries∑ Timeout
cs.ovgu.de

ok
1
0
vccourses.cs.ovgu.de


1
0
_acme-challenge.vccourses.cs.ovgu.de

Name Error - The domain name does not exist
1
0
_acme-challenge.vccourses2.cs.ovgu.de

Name Error - The domain name does not exist
1
0
_acme-challenge.vccourses.cs.ovgu.de.cs.ovgu.de

Name Error - The domain name does not exist
1
0
_acme-challenge.vccourses.cs.ovgu.de.vccourses.cs.ovgu.de

Name Error - The domain name does not exist
1
0
_acme-challenge.vccourses2.cs.ovgu.de.vccourses2.cs.ovgu.de

Name Error - The domain name does not exist
1
0


15. Portchecks

Domain or IPPortDescriptionResultAnswer
vccourses.cs.ovgu.de
21
FTP



vccourses.cs.ovgu.de
21
FTP



vccourses.cs.ovgu.de
22
SSH
open
SSH-2.0-OpenSSH_7.9p1 Debian-10+deb10u2

vccourses.cs.ovgu.de
22
SSH
open
SSH-2.0-OpenSSH_7.9p1 Debian-10+deb10u2

vccourses.cs.ovgu.de
25
SMTP



vccourses.cs.ovgu.de
25
SMTP



vccourses.cs.ovgu.de
53
DNS



vccourses.cs.ovgu.de
53
DNS



vccourses.cs.ovgu.de
110
POP3



vccourses.cs.ovgu.de
110
POP3



vccourses.cs.ovgu.de
143
IMAP



vccourses.cs.ovgu.de
143
IMAP



vccourses.cs.ovgu.de
465
SMTP (encrypted)



vccourses.cs.ovgu.de
465
SMTP (encrypted)



vccourses.cs.ovgu.de
587
SMTP (encrypted, submission)



vccourses.cs.ovgu.de
587
SMTP (encrypted, submission)



vccourses.cs.ovgu.de
993
IMAP (encrypted)



vccourses.cs.ovgu.de
993
IMAP (encrypted)



vccourses.cs.ovgu.de
995
POP3 (encrypted)



vccourses.cs.ovgu.de
995
POP3 (encrypted)



vccourses.cs.ovgu.de
1433
MS SQL



vccourses.cs.ovgu.de
1433
MS SQL



vccourses.cs.ovgu.de
2082
cPanel (http)



vccourses.cs.ovgu.de
2082
cPanel (http)



vccourses.cs.ovgu.de
2083
cPanel (https)



vccourses.cs.ovgu.de
2083
cPanel (https)



vccourses.cs.ovgu.de
2086
WHM (http)



vccourses.cs.ovgu.de
2086
WHM (http)



vccourses.cs.ovgu.de
2087
WHM (https)



vccourses.cs.ovgu.de
2087
WHM (https)



vccourses.cs.ovgu.de
2089
cPanel Licensing



vccourses.cs.ovgu.de
2089
cPanel Licensing



vccourses.cs.ovgu.de
2095
cPanel Webmail (http)



vccourses.cs.ovgu.de
2095
cPanel Webmail (http)



vccourses.cs.ovgu.de
2096
cPanel Webmail (https)



vccourses.cs.ovgu.de
2096
cPanel Webmail (https)



vccourses.cs.ovgu.de
2222
DirectAdmin (http)



vccourses.cs.ovgu.de
2222
DirectAdmin (http)



vccourses.cs.ovgu.de
2222
DirectAdmin (https)



vccourses.cs.ovgu.de
2222
DirectAdmin (https)



vccourses.cs.ovgu.de
3306
mySql



vccourses.cs.ovgu.de
3306
mySql



vccourses.cs.ovgu.de
5224
Plesk Licensing



vccourses.cs.ovgu.de
5224
Plesk Licensing



vccourses.cs.ovgu.de
5432
PostgreSQL



vccourses.cs.ovgu.de
5432
PostgreSQL



vccourses.cs.ovgu.de
8080
Ookla Speedtest (http)



vccourses.cs.ovgu.de
8080
Ookla Speedtest (http)



vccourses.cs.ovgu.de
8080
Ookla Speedtest (https)



vccourses.cs.ovgu.de
8080
Ookla Speedtest (https)



vccourses.cs.ovgu.de
8083
VestaCP http



vccourses.cs.ovgu.de
8083
VestaCP http



vccourses.cs.ovgu.de
8083
VestaCP https



vccourses.cs.ovgu.de
8083
VestaCP https



vccourses.cs.ovgu.de
8443
Plesk Administration (https)



vccourses.cs.ovgu.de
8443
Plesk Administration (https)



vccourses.cs.ovgu.de
8447
Plesk Installer + Updates



vccourses.cs.ovgu.de
8447
Plesk Installer + Updates



vccourses.cs.ovgu.de
8880
Plesk Administration (http)



vccourses.cs.ovgu.de
8880
Plesk Administration (http)



vccourses.cs.ovgu.de
10000
Webmin (http)



vccourses.cs.ovgu.de
10000
Webmin (http)



vccourses.cs.ovgu.de
10000
Webmin (https)



vccourses.cs.ovgu.de
10000
Webmin (https)



141.44.23.45
21
FTP



141.44.23.45
21
FTP



141.44.23.45
22
SSH
open
SSH-2.0-OpenSSH_7.9p1 Debian-10+deb10u2

141.44.23.45
22
SSH
open
SSH-2.0-OpenSSH_7.9p1 Debian-10+deb10u2

141.44.23.45
25
SMTP



141.44.23.45
25
SMTP



141.44.23.45
53
DNS



141.44.23.45
53
DNS



141.44.23.45
110
POP3



141.44.23.45
110
POP3



141.44.23.45
143
IMAP



141.44.23.45
143
IMAP



141.44.23.45
465
SMTP (encrypted)



141.44.23.45
465
SMTP (encrypted)



141.44.23.45
587
SMTP (encrypted, submission)



141.44.23.45
587
SMTP (encrypted, submission)



141.44.23.45
993
IMAP (encrypted)



141.44.23.45
993
IMAP (encrypted)



141.44.23.45
995
POP3 (encrypted)



141.44.23.45
995
POP3 (encrypted)



141.44.23.45
1433
MS SQL



141.44.23.45
1433
MS SQL



141.44.23.45
2082
cPanel (http)



141.44.23.45
2082
cPanel (http)



141.44.23.45
2083
cPanel (https)



141.44.23.45
2083
cPanel (https)



141.44.23.45
2086
WHM (http)



141.44.23.45
2086
WHM (http)



141.44.23.45
2087
WHM (https)



141.44.23.45
2087
WHM (https)



141.44.23.45
2089
cPanel Licensing



141.44.23.45
2089
cPanel Licensing



141.44.23.45
2095
cPanel Webmail (http)



141.44.23.45
2095
cPanel Webmail (http)



141.44.23.45
2096
cPanel Webmail (https)



141.44.23.45
2096
cPanel Webmail (https)



141.44.23.45
2222
DirectAdmin (http)



141.44.23.45
2222
DirectAdmin (http)



141.44.23.45
2222
DirectAdmin (https)



141.44.23.45
2222
DirectAdmin (https)



141.44.23.45
3306
mySql



141.44.23.45
3306
mySql



141.44.23.45
5224
Plesk Licensing



141.44.23.45
5224
Plesk Licensing



141.44.23.45
5432
PostgreSQL



141.44.23.45
5432
PostgreSQL



141.44.23.45
8080
Ookla Speedtest (http)



141.44.23.45
8080
Ookla Speedtest (http)



141.44.23.45
8080
Ookla Speedtest (https)



141.44.23.45
8080
Ookla Speedtest (https)



141.44.23.45
8083
VestaCP http



141.44.23.45
8083
VestaCP http



141.44.23.45
8083
VestaCP https



141.44.23.45
8083
VestaCP https



141.44.23.45
8443
Plesk Administration (https)



141.44.23.45
8443
Plesk Administration (https)



141.44.23.45
8447
Plesk Installer + Updates



141.44.23.45
8447
Plesk Installer + Updates



141.44.23.45
8880
Plesk Administration (http)



141.44.23.45
8880
Plesk Administration (http)



141.44.23.45
10000
Webmin (http)



141.44.23.45
10000
Webmin (http)



141.44.23.45
10000
Webmin (https)



141.44.23.45
10000
Webmin (https)





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