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



X

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

Checked:
10.06.2021 12:44:56


Older results

No older results found


1. IP-Addresses

HostTypeIP-Addressis auth.∑ Queries∑ Timeout
vccourses3.cs.ovgu.de
A
141.44.23.46
Magdeburg/Saxony-Anhalt/Germany (DE) - Verein zur Foerderung eines Deutschen Forschungsnetzes e.V.
No Hostname found
yes
1
0

AAAA

yes


www.vccourses3.cs.ovgu.de

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



AAAA
Name Error
yes



CNAME
Name Error
yes


*.vccourses3.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=



1 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: vccourses3.cs.ovgu.de
vccourses3.cs.ovgu.de
0 DS RR in the parent zone found



0 DNSKEY RR found




Zone: www.vccourses3.cs.ovgu.de
www.vccourses3.cs.ovgu.de
0 DS RR in the parent zone found


3. Name Servers

DomainNameserverNS-IP
www.vccourses3.cs.ovgu.de
  ns.cs.ovgu.de

vccourses3.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


4. SOA-Entries


Domain:de
Zone-Name:de
Primary:f.nic.de
Mail:its.denic.de
Serial:1623321766
Refresh:7200
Retry:7200
Expire:3600000
TTL:7200
num Entries:4


Domain:de
Zone-Name:de
Primary:f.nic.de
Mail:its.denic.de
Serial:1623321821
Refresh:7200
Retry:7200
Expire:3600000
TTL:7200
num Entries:2


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:vccourses3.cs.ovgu.de
Zone-Name:
Primary:
Mail:
Serial:
Refresh:
Retry:
Expire:
TTL:
num Entries:1


Domain:www.vccourses3.cs.ovgu.de
Zone-Name:
Primary:
Mail:
Serial:
Refresh:
Retry:
Expire:
TTL:
num Entries:1


5. Screenshots

Startaddress: https://vccourses3.cs.ovgu.de, address used: https://vccourses3.cs.ovgu.de/, Screenshot created 2021-06-10 12:46:09 +00:0

Mobil (412px x 732px)

164 milliseconds

Screenshot mobile - https://vccourses3.cs.ovgu.de/
Mobil + Landscape (732px x 412px)

139 milliseconds

Screenshot mobile landscape - https://vccourses3.cs.ovgu.de/
Screen (1280px x 1680px)

215 milliseconds

Screenshot Desktop - https://vccourses3.cs.ovgu.de/

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_256_GCM.

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

6. Url-Checks


:

:
DomainnameHttp-StatusredirectSec.G
• http://vccourses3.cs.ovgu.de/
141.44.23.46
301
https://vccourses3.cs.ovgu.de/
Html is minified: 108.19 %
0.043
A
Server: nginx/1.14.2
Date: Thu, 10 Jun 2021 10:45:33 GMT
Content-Type: text/html
Content-Length: 185
Connection: close
Location: https://vccourses3.cs.ovgu.de/

• https://vccourses3.cs.ovgu.de/
141.44.23.46
200

3.386
B
small visible content (num chars: 0)
Server: nginx
Date: Thu, 10 Jun 2021 10:45:33 GMT
Content-Type: text/html
Content-Length: 0
Last-Modified: Thu, 10 Jun 2021 09:30:01 GMT
Connection: close
ETag: "60c1db99-0"
Accept-Ranges: bytes

• http://vccourses3.cs.ovgu.de/.well-known/acme-challenge/check-your-website-dot-server-daten-dot-de
141.44.23.46
Inline-JavaScript (∑/total): 0/0 Inline-CSS (∑/total): 0/0
301
https://vccourses3.cs.ovgu.de/.well-known/acme-challenge/check-your-website-dot-server-daten-dot-de
Html is minified: 108.19 %
0.036
A
Visible Content: 301 Moved Permanently nginx/1.14.2
Server: nginx/1.14.2
Date: Thu, 10 Jun 2021 10:45:37 GMT
Content-Type: text/html
Content-Length: 185
Connection: close
Location: https://vccourses3.cs.ovgu.de/.well-known/acme-challenge/check-your-website-dot-server-daten-dot-de

• https://vccourses3.cs.ovgu.de/.well-known/acme-challenge/check-your-website-dot-server-daten-dot-de
GZip used - 125 / 162 - 22.84 %
Inline-JavaScript (∑/total): 0/0 Inline-CSS (∑/total): 0/0
404

Html is minified: 109.46 %
3.160
A
Not Found
Visible Content: 404 Not Found nginx
Server: nginx
Date: Thu, 10 Jun 2021 10:45:41 GMT
Content-Type: text/html
Transfer-Encoding: chunked
Connection: close
Content-Encoding: gzip

• https://141.44.23.46/
141.44.23.46
302
https://aud.vc.cs.ovgu.de/
Html is minified: 110.00 %
3.210
N
Certificate error: RemoteCertificateNameMismatch
Server: nginx
Date: Thu, 10 Jun 2021 10:45:37 GMT
Content-Type: text/html
Content-Length: 154
Connection: close
Location: https://aud.vc.cs.ovgu.de/

• https://aud.vc.cs.ovgu.de/

502

Html is minified: 19136.73 %
3.224
S
Bad Gateway
Server: nginx
Date: Thu, 10 Jun 2021 10:45:45 GMT
Content-Type: text/html
Content-Length: 18754
Connection: close
ETag: "5d7a5d5f-4942"

7. Comments


1. General Results, most used to calculate the result

Aname "vccourses3.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: vccourses3.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: vccourses3.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://141.44.23.46/ 141.44.23.46
302
https://aud.vc.cs.ovgu.de/
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.
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):0 complete Content-Type - header (2 urls)
https://vccourses3.cs.ovgu.de/ 141.44.23.46


Url with incomplete Content-Type - header - missing charset
https://vccourses3.cs.ovgu.de/.well-known/acme-challenge/check-your-website-dot-server-daten-dot-de


Url with incomplete Content-Type - header - missing charset
Ahttp://vccourses3.cs.ovgu.de/ 141.44.23.46
301
https://vccourses3.cs.ovgu.de/
correct redirect http - https with the same domain name
Bhttps://vccourses3.cs.ovgu.de/ 141.44.23.46
200

Missing HSTS-Header
Bhttps://vccourses3.cs.ovgu.de/.well-known/acme-challenge/check-your-website-dot-server-daten-dot-de
404

Missing HSTS-Header
Nhttps://141.44.23.46/ 141.44.23.46
302
https://aud.vc.cs.ovgu.de/
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 vccourses3.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.: 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.: 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.
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: 5 good Nameserver
AGood: Nameserver supports Echo Capitalization: 5 good Nameserver
AGood: Nameserver supports EDNS with max. 512 Byte Udp payload, message is smaller: 5 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 has a minified Html-Content with a quota lower then 110 %.
https://vccourses3.cs.ovgu.de/ 141.44.23.46
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.
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://vccourses3.cs.ovgu.de/.well-known/acme-challenge/check-your-website-dot-server-daten-dot-de
404
3.160 seconds
Warning: 404 needs more then one second
AInfo: Different Server-Headers found
ADuration: 79637 milliseconds, 79.637 seconds


8. Connections

DomainIPPortCert.ProtocolKeyExchangeStrengthCipherStrengthHashAlgorithmOCSP stapling
Domain/KeyExchangeIP/StrengthPort/CipherCert./StrengthProtocol/HashAlgorithmOCSP stapling
vccourses3.cs.ovgu.de
141.44.23.46
443
ok
Tls12
ECDH Ephermal
255
Aes256
256
Sha384
error checking OCSP stapling
ok
vccourses3.cs.ovgu.de
141.44.23.46
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
Tls.1.1
Tls.1.0
no http/2 via ALPN
No SNI required - domain included in main certificate
Tls.1.2
Tls.1.1
Tls.1.0
Chain (complete)
1CN=cagd.cs.ovgu.de

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

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


vccourses3.cs.ovgu.de
vccourses3.cs.ovgu.de
443
ok
Tls12
ECDH Ephermal
255
Aes256
256
Sha384
error checking OCSP stapling
ok

vccourses3.cs.ovgu.de
vccourses3.cs.ovgu.de
443
ok
Tls12

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

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

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


141.44.23.46
141.44.23.46
443
name does not match
Tls12
ECDH Ephermal
255
Aes256
256
Sha384
error checking OCSP stapling
ok

141.44.23.46
141.44.23.46
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
Tls.1.1
Tls.1.0
no http/2 via ALPN
Cert sent without SNI
Tls.1.2
Tls.1.1
Tls.1.0
Chain (complete)
1CN=cagd.cs.ovgu.de

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

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


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

aud.vc.cs.ovgu.de
aud.vc.cs.ovgu.de
443
ok
Tls12

ECDH Ephermal
255
Aes256
256
Sha384
error checking OCSP stapling
ok
no http/2 via ALPN 
Tls.1.2
Tls.1.1
Tls.1.0
no http/2 via ALPN
Tls.1.2
Tls.1.1
Tls.1.0
Chain (complete)
1CN=cagd.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=cagd.cs.ovgu.de
10.06.2021
08.09.2021
expires in 77 days
aud.vc.cs.ovgu.de, cagd.cs.ovgu.de, cg.vc.cs.ovgu.de, einfinf.vc.cs.ovgu.de, pages.vc.cs.ovgu.de, vccourses3.cs.ovgu.de, vcxx.cs.ovgu.de - 7 entries
1.
1.
CN=cagd.cs.ovgu.de
10.06.2021

08.09.2021
expires in 77 days
aud.vc.cs.ovgu.de, cagd.cs.ovgu.de, cg.vc.cs.ovgu.de, einfinf.vc.cs.ovgu.de, pages.vc.cs.ovgu.de, vccourses3.cs.ovgu.de, vcxx.cs.ovgu.de - 7 entries

KeyalgorithmRSA encryption (2048 bit)
Signatur:SHA256 With RSA-Encryption
Serial Number:04AADFC84C1BB3018375B28DC60C484B06DB
Thumbprint:196F010944581745B6CB4B2A46D7A591A19FEB03
SHA256 / Certificate:LkW3TKpJLBiSINLYLHCKtl0RgRuPTLCfBAwezHkdpeE=
SHA256 hex / Cert (DANE * 0 1):e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855
SHA256 hex / PublicKey (DANE * 1 1):ed1cd04425dec7a8ae4d278df7951cf6579a28177787343d35d38c154e93d477
SHA256 hex / Subject Public Key Information (SPKI):1335a1028b8858980966784100189afdd5fe85a25711d7498980c8dffc0f44d0
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=cagd.cs.ovgu.de
10.06.2021
08.09.2021
expires in 77 days
aud.vc.cs.ovgu.de, cagd.cs.ovgu.de, cg.vc.cs.ovgu.de, einfinf.vc.cs.ovgu.de, pages.vc.cs.ovgu.de, vccourses3.cs.ovgu.de, vcxx.cs.ovgu.de - 7 entries

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

08.09.2021
expires in 77 days
aud.vc.cs.ovgu.de, cagd.cs.ovgu.de, cg.vc.cs.ovgu.de, einfinf.vc.cs.ovgu.de, pages.vc.cs.ovgu.de, vccourses3.cs.ovgu.de, vcxx.cs.ovgu.de - 7 entries

KeyalgorithmRSA encryption (2048 bit)
Signatur:SHA256 With RSA-Encryption
Serial Number:04AADFC84C1BB3018375B28DC60C484B06DB
Thumbprint:196F010944581745B6CB4B2A46D7A591A19FEB03
SHA256 / Certificate:LkW3TKpJLBiSINLYLHCKtl0RgRuPTLCfBAwezHkdpeE=
SHA256 hex / Cert (DANE * 0 1):e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855
SHA256 hex / PublicKey (DANE * 1 1):ed1cd04425dec7a8ae4d278df7951cf6579a28177787343d35d38c154e93d477
SHA256 hex / Subject Public Key Information (SPKI):1335a1028b8858980966784100189afdd5fe85a25711d7498980c8dffc0f44d0
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
5
5

CertSpotter-IdIssuernot beforenot afterDomain namesLE-Duplicatenext LE
2617183875
leaf cert
CN=R3, O=Let's Encrypt, C=US
2021-06-10 09:33:03
2021-09-08 09:33:02
aud.vc.cs.ovgu.de, cagd.cs.ovgu.de, cg.vc.cs.ovgu.de, einfinf.vc.cs.ovgu.de, pages.vc.cs.ovgu.de, vccourses3.cs.ovgu.de, vcxx.cs.ovgu.de - 7 entries


2617011242
leaf cert
CN=R3, O=Let's Encrypt, C=US
2021-06-10 08:19:01
2021-09-08 08:19:00
aud.vc.cs.ovgu.de, cagd.cs.ovgu.de, cg.vc.cs.ovgu.de, einfinf.vc.cs.ovgu.de, pages.vc.cs.ovgu.de, vccourses3.cs.ovgu.de, vcxx.cs.ovgu.de - 7 entries


2616958746
leaf cert
CN=R3, O=Let's Encrypt, C=US
2021-06-10 07:53:55
2021-09-08 07:53:54
aud.vc.cs.ovgu.de, cagd.cs.ovgu.de, cg.vc.cs.ovgu.de, einfinf.vc.cs.ovgu.de, pages.vc.cs.ovgu.de, vccourses3.cs.ovgu.de, vcxx.cs.ovgu.de - 7 entries


2616921141
leaf cert
CN=R3, O=Let's Encrypt, C=US
2021-06-10 07:35:29
2021-09-08 07:35:28
pages.vc.cs.ovgu.de, vccourses3.cs.ovgu.de - 2 entries


2616845469
leaf cert
CN=R3, O=Let's Encrypt, C=US
2021-06-10 07:03:01
2021-09-08 07:03:00
vccourses3.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=R3, O=Let's Encrypt, C=US
0 /0 new
5
5

CRT-IdIssuernot beforenot afterDomain namesLE-Duplicatenext LE
4677697617
precert
CN=R3, O=Let's Encrypt, C=US
2021-06-10 07:33:03
2021-09-08 07:33:02
aud.vc.cs.ovgu.de, cagd.cs.ovgu.de, cg.vc.cs.ovgu.de, einfinf.vc.cs.ovgu.de, pages.vc.cs.ovgu.de, vccourses3.cs.ovgu.de, vcxx.cs.ovgu.de
7 entries


4677393551
leaf cert
CN=R3, O=Let's Encrypt, C=US
2021-06-10 06:19:01
2021-09-08 06:19:00
aud.vc.cs.ovgu.de, cagd.cs.ovgu.de, cg.vc.cs.ovgu.de, einfinf.vc.cs.ovgu.de, pages.vc.cs.ovgu.de, vccourses3.cs.ovgu.de, vcxx.cs.ovgu.de
7 entries


4677293970
precert
CN=R3, O=Let's Encrypt, C=US
2021-06-10 05:53:55
2021-09-08 05:53:54
aud.vc.cs.ovgu.de, cagd.cs.ovgu.de, cg.vc.cs.ovgu.de, einfinf.vc.cs.ovgu.de, pages.vc.cs.ovgu.de, vccourses3.cs.ovgu.de, vcxx.cs.ovgu.de
7 entries


4677225197
leaf cert
CN=R3, O=Let's Encrypt, C=US
2021-06-10 05:35:29
2021-09-08 05:35:28
pages.vc.cs.ovgu.de, vccourses3.cs.ovgu.de
2 entries


4677093640
precert
CN=R3, O=Let's Encrypt, C=US
2021-06-10 05:03:01
2021-09-08 05:03:00
vccourses3.cs.ovgu.de
1 entries



11. Html-Content - Entries

No Html-Content entries found. Only checked if https + status 200/401/403/404


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
d.root-servers.net (2001:500:2d::d)

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
vccourses3.cs.ovgu.de
0

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

no CAA entry found
1
0
ovgu.de
0

no CAA entry found
1
0
de
0

no CAA entry found
1
0


14. TXT - Entries

DomainnameTXT EntryStatus∑ Queries∑ Timeout
cs.ovgu.de

ok
1
0
vccourses3.cs.ovgu.de

ok
1
0
_acme-challenge.vccourses3.cs.ovgu.de

Name Error - The domain name does not exist
1
0
_acme-challenge.vccourses3.cs.ovgu.de.cs.ovgu.de

Name Error - The domain name does not exist
1
0
_acme-challenge.vccourses3.cs.ovgu.de.vccourses3.cs.ovgu.de

Name Error - The domain name does not exist
1
0


15. Portchecks

Domain or IPPortDescriptionResultAnswer
vccourses3.cs.ovgu.de
21
FTP



vccourses3.cs.ovgu.de
21
FTP



vccourses3.cs.ovgu.de
22
SSH
open
SSH-2.0-OpenSSH_7.9p1 Debian-10+deb10u2

vccourses3.cs.ovgu.de
22
SSH
open
SSH-2.0-OpenSSH_7.9p1 Debian-10+deb10u2

vccourses3.cs.ovgu.de
25
SMTP



vccourses3.cs.ovgu.de
25
SMTP



vccourses3.cs.ovgu.de
53
DNS



vccourses3.cs.ovgu.de
53
DNS



vccourses3.cs.ovgu.de
110
POP3



vccourses3.cs.ovgu.de
110
POP3



vccourses3.cs.ovgu.de
143
IMAP



vccourses3.cs.ovgu.de
143
IMAP



vccourses3.cs.ovgu.de
465
SMTP (encrypted)



vccourses3.cs.ovgu.de
465
SMTP (encrypted)



vccourses3.cs.ovgu.de
587
SMTP (encrypted, submission)



vccourses3.cs.ovgu.de
587
SMTP (encrypted, submission)



vccourses3.cs.ovgu.de
993
IMAP (encrypted)



vccourses3.cs.ovgu.de
993
IMAP (encrypted)



vccourses3.cs.ovgu.de
995
POP3 (encrypted)



vccourses3.cs.ovgu.de
995
POP3 (encrypted)



vccourses3.cs.ovgu.de
1433
MS SQL



vccourses3.cs.ovgu.de
1433
MS SQL



vccourses3.cs.ovgu.de
2082
cPanel (http)



vccourses3.cs.ovgu.de
2082
cPanel (http)



vccourses3.cs.ovgu.de
2083
cPanel (https)



vccourses3.cs.ovgu.de
2083
cPanel (https)



vccourses3.cs.ovgu.de
2086
WHM (http)



vccourses3.cs.ovgu.de
2086
WHM (http)



vccourses3.cs.ovgu.de
2087
WHM (https)



vccourses3.cs.ovgu.de
2087
WHM (https)



vccourses3.cs.ovgu.de
2089
cPanel Licensing



vccourses3.cs.ovgu.de
2089
cPanel Licensing



vccourses3.cs.ovgu.de
2095
cPanel Webmail (http)



vccourses3.cs.ovgu.de
2095
cPanel Webmail (http)



vccourses3.cs.ovgu.de
2096
cPanel Webmail (https)



vccourses3.cs.ovgu.de
2096
cPanel Webmail (https)



vccourses3.cs.ovgu.de
2222
DirectAdmin (http)



vccourses3.cs.ovgu.de
2222
DirectAdmin (http)



vccourses3.cs.ovgu.de
2222
DirectAdmin (https)



vccourses3.cs.ovgu.de
2222
DirectAdmin (https)



vccourses3.cs.ovgu.de
3306
mySql



vccourses3.cs.ovgu.de
3306
mySql



vccourses3.cs.ovgu.de
5224
Plesk Licensing



vccourses3.cs.ovgu.de
5224
Plesk Licensing



vccourses3.cs.ovgu.de
5432
PostgreSQL



vccourses3.cs.ovgu.de
5432
PostgreSQL



vccourses3.cs.ovgu.de
8080
Ookla Speedtest (http)



vccourses3.cs.ovgu.de
8080
Ookla Speedtest (http)



vccourses3.cs.ovgu.de
8080
Ookla Speedtest (https)



vccourses3.cs.ovgu.de
8080
Ookla Speedtest (https)



vccourses3.cs.ovgu.de
8083
VestaCP http



vccourses3.cs.ovgu.de
8083
VestaCP http



vccourses3.cs.ovgu.de
8083
VestaCP https



vccourses3.cs.ovgu.de
8083
VestaCP https



vccourses3.cs.ovgu.de
8443
Plesk Administration (https)



vccourses3.cs.ovgu.de
8443
Plesk Administration (https)



vccourses3.cs.ovgu.de
8447
Plesk Installer + Updates



vccourses3.cs.ovgu.de
8447
Plesk Installer + Updates



vccourses3.cs.ovgu.de
8880
Plesk Administration (http)



vccourses3.cs.ovgu.de
8880
Plesk Administration (http)



vccourses3.cs.ovgu.de
10000
Webmin (http)



vccourses3.cs.ovgu.de
10000
Webmin (http)



vccourses3.cs.ovgu.de
10000
Webmin (https)



vccourses3.cs.ovgu.de
10000
Webmin (https)



141.44.23.46
21
FTP



141.44.23.46
21
FTP



141.44.23.46
22
SSH
open
SSH-2.0-OpenSSH_7.9p1 Debian-10+deb10u2

141.44.23.46
22
SSH
open
SSH-2.0-OpenSSH_7.9p1 Debian-10+deb10u2

141.44.23.46
25
SMTP



141.44.23.46
25
SMTP



141.44.23.46
53
DNS



141.44.23.46
53
DNS



141.44.23.46
110
POP3



141.44.23.46
110
POP3



141.44.23.46
143
IMAP



141.44.23.46
143
IMAP



141.44.23.46
465
SMTP (encrypted)



141.44.23.46
465
SMTP (encrypted)



141.44.23.46
587
SMTP (encrypted, submission)



141.44.23.46
587
SMTP (encrypted, submission)



141.44.23.46
993
IMAP (encrypted)



141.44.23.46
993
IMAP (encrypted)



141.44.23.46
995
POP3 (encrypted)



141.44.23.46
995
POP3 (encrypted)



141.44.23.46
1433
MS SQL



141.44.23.46
1433
MS SQL



141.44.23.46
2082
cPanel (http)



141.44.23.46
2082
cPanel (http)



141.44.23.46
2083
cPanel (https)



141.44.23.46
2083
cPanel (https)



141.44.23.46
2086
WHM (http)



141.44.23.46
2086
WHM (http)



141.44.23.46
2087
WHM (https)



141.44.23.46
2087
WHM (https)



141.44.23.46
2089
cPanel Licensing



141.44.23.46
2089
cPanel Licensing



141.44.23.46
2095
cPanel Webmail (http)



141.44.23.46
2095
cPanel Webmail (http)



141.44.23.46
2096
cPanel Webmail (https)



141.44.23.46
2096
cPanel Webmail (https)



141.44.23.46
2222
DirectAdmin (http)



141.44.23.46
2222
DirectAdmin (http)



141.44.23.46
2222
DirectAdmin (https)



141.44.23.46
2222
DirectAdmin (https)



141.44.23.46
3306
mySql



141.44.23.46
3306
mySql



141.44.23.46
5224
Plesk Licensing



141.44.23.46
5224
Plesk Licensing



141.44.23.46
5432
PostgreSQL



141.44.23.46
5432
PostgreSQL



141.44.23.46
8080
Ookla Speedtest (http)



141.44.23.46
8080
Ookla Speedtest (http)



141.44.23.46
8080
Ookla Speedtest (https)



141.44.23.46
8080
Ookla Speedtest (https)



141.44.23.46
8083
VestaCP http



141.44.23.46
8083
VestaCP http



141.44.23.46
8083
VestaCP https



141.44.23.46
8083
VestaCP https



141.44.23.46
8443
Plesk Administration (https)



141.44.23.46
8443
Plesk Administration (https)



141.44.23.46
8447
Plesk Installer + Updates



141.44.23.46
8447
Plesk Installer + Updates



141.44.23.46
8880
Plesk Administration (http)



141.44.23.46
8880
Plesk Administration (http)



141.44.23.46
10000
Webmin (http)



141.44.23.46
10000
Webmin (http)



141.44.23.46
10000
Webmin (https)



141.44.23.46
10000
Webmin (https)





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