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



X

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

Checked:
04.05.2021 12:42:28


Older results


1. IP-Addresses

HostTypeIP-Addressis auth.∑ Queries∑ Timeout
citycomaustria.at
A
91.143.111.171
Graz/Styria/Austria (AT) - Citycom Telekommunikation GmbH
Hostname: 171-111-143-91.static.grazkom.at
yes
2
0

AAAA

yes


www.citycomaustria.at
CNAME
citycomaustria.at
yes
1
0

A
91.143.111.171
Graz/Styria/Austria (AT) - Citycom Telekommunikation GmbH
Hostname: 171-111-143-91.static.grazkom.at
yes


*.citycomaustria.at
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: 22.05.2021, 00:00:00 +, Signature-Inception: 01.05.2021, 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: at
at
2 DS RR in the parent zone found



DS with Algorithm 8, KeyTag 19294, DigestType 2 and Digest j50KzXj/L4j1ZBwznwWGIiCu9Rpt9IADnI1NpPH4oOA=



DS with Algorithm 8, KeyTag 5321, DigestType 2 and Digest s/vQJLYUIxnAZHbQ/KU8LlvYlLGwO0wY6p4nvfs86vM=



1 RRSIG RR to validate DS RR found



RRSIG-Owner at., Algorithm: 8, 1 Labels, original TTL: 86400 sec, Signature-expiration: 17.05.2021, 05:00:00 +, Signature-Inception: 04.05.2021, 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



3 DNSKEY RR found



Public Key with Algorithm 8, KeyTag 5321, Flags 257 (SEP = Secure Entry Point)



Public Key with Algorithm 8, KeyTag 19294, Flags 257 (SEP = Secure Entry Point)



Public Key with Algorithm 8, KeyTag 24808, Flags 256



1 RRSIG RR to validate DNSKEY RR found



RRSIG-Owner at., Algorithm: 8, 1 Labels, original TTL: 3600 sec, Signature-expiration: 12.05.2021, 23:16:31 +, Signature-Inception: 28.04.2021, 04:01:33 +, KeyTag 5321, Signer-Name: at



Status: Good - Algorithmus 8 and DNSKEY with KeyTag 5321 used to validate the DNSKEY RRSet



Status: Valid Chain of trust. Parent-DS with Algorithm 8, KeyTag 5321, DigestType 2 and Digest "s/vQJLYUIxnAZHbQ/KU8LlvYlLGwO0wY6p4nvfs86vM=" validates local Key with the same values, Key ist Secure Entry Point (SEP) of the zone

Zone: citycomaustria.at
citycomaustria.at
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 "9pr9f0b8ejob005tl775rumcqvh4tkrm" between the hashed NSEC3-owner "9pr48nqg7b8jdddgla0fh9t7plval611" and the hashed NextOwner "9prf5fn1du33rkhp50l9ua5reh5ftt3s". So the parent zone confirmes the not-existence of a DS RR.
Bitmap: TXT, RRSIG Validated: RRSIG-Owner 9pr48nqg7b8jdddgla0fh9t7plval611.at., Algorithm: 8, 2 Labels, original TTL: 10800 sec, Signature-expiration: 18.05.2021, 01:59:11 +, Signature-Inception: 03.05.2021, 02:01:32 +, KeyTag 24808, Signer-Name: at



DS-Query in the parent zone sends valid NSEC3 RR with the Hash "g74toh7t5afaaj1aquf809g5p99jrkp3" as Owner. That's the Hash of "at" with the NextHashedOwnerName "g753fidd2c5paeuftvrp80pqt7oqau5r". So that domain name is the Closest Encloser of "citycomaustria.at". Opt-Out: True.
Bitmap: NS, SOA, RRSIG, DNSKEY, NSEC3PARAM Validated: RRSIG-Owner g74toh7t5afaaj1aquf809g5p99jrkp3.at., Algorithm: 8, 2 Labels, original TTL: 10800 sec, Signature-expiration: 12.05.2021, 22:28:23 +, Signature-Inception: 29.04.2021, 00:01:31 +, KeyTag 24808, Signer-Name: at



0 DNSKEY RR found




Zone: www.citycomaustria.at
www.citycomaustria.at
0 DS RR in the parent zone found


3. Name Servers

DomainNameserverNS-IP
citycomaustria.at
  dns1.grazkom.at
217.29.144.65
Graz/Styria/Austria (AT) - Citycom Telekommunikation GmbH


  dns2.grazkom.at
217.29.144.66
Graz/Styria/Austria (AT) - Citycom Telekommunikation GmbH

at
  d.ns.at / id-d-FRA-01-at


  dns.nic.at


  j.ns.at / s2.amx


  n.ns.at / id-n-AMS-01-at


  ns1.univie.ac.at / id-01-NIG-02-at


  ns2.univie.ac.at / id-02-FRA-05-at


  ns9.univie.ac.at / ns-2.at.de8


  r.ns.at / tld-all-ber1


  u.ns.at / id-u-LON-01-at


4. SOA-Entries


Domain:at
Zone-Name:
Primary:
Mail:
Serial:
Refresh:
Retry:
Expire:
TTL:
num Entries:1


Domain:at
Zone-Name:at
Primary:dns.nic.at
Mail:domain-admin.univie.ac.at
Serial:1620118801
Refresh:10800
Retry:3600
Expire:604800
TTL:10800
num Entries:8


Domain:citycomaustria.at
Zone-Name:citycomaustria.at
Primary:dns1.grazkom.at
Mail:hostmaster.grazkom.at
Serial:2011082800
Refresh:10800
Retry:3600
Expire:604800
TTL:3600
num Entries:2


5. Screenshots

No Screenshot listed, because no url-check with https + http status 200-299, 400-599 + not-ACME-check found.

6. Url-Checks


:

:
DomainnameHttp-StatusredirectSec.G
• http://citycomaustria.at/
91.143.111.171 GZip used - 868 / 1861 - 53.36 %
200

Html is minified: 214.15 %
0.063
H
small visible content (num chars: 269)
Welcome to your website! This is the default index page of your website. This file may be deleted or overwritten without any difficulty. This is produced by the file index.html in the web directory. For questions or problems please contact support. Powered by ISPConfig
Date: Tue, 04 May 2021 10:42:47 GMT
Server: Apache/2.4.38 (Debian)
Last-Modified: Tue, 04 May 2021 07:38:02 GMT
ETag: "745-5c17c286fbc4a-gzip"
Accept-Ranges: bytes
Vary: Accept-Encoding
Content-Encoding: gzip
Content-Length: 868
Connection: close
Content-Type: text/html

• http://www.citycomaustria.at/
91.143.111.171 GZip used - 868 / 1861 - 53.36 %
200

Html is minified: 214.15 %
0.217
H
small visible content (num chars: 269)
Welcome to your website! This is the default index page of your website. This file may be deleted or overwritten without any difficulty. This is produced by the file index.html in the web directory. For questions or problems please contact support. Powered by ISPConfig
Date: Tue, 04 May 2021 10:42:47 GMT
Server: Apache/2.4.38 (Debian)
Last-Modified: Tue, 04 May 2021 07:38:02 GMT
ETag: "745-5c17c286fbc4a-gzip"
Accept-Ranges: bytes
Vary: Accept-Encoding
Content-Encoding: gzip
Content-Length: 868
Connection: close
Content-Type: text/html

• https://citycomaustria.at/
91.143.111.171
-4

0.140
W
SendFailure - The underlying connection was closed: An unexpected error occurred on a send.

• https://www.citycomaustria.at/
91.143.111.171
-4

0.120
W
SendFailure - The underlying connection was closed: An unexpected error occurred on a send.

• http://citycomaustria.at:443/
91.143.111.171 GZip used - 3041 / 10701 - 71.58 %
200

Html is minified: 221.60 %
0.103
Q
Visible Content: Apache2 Debian Default Page It works! This is the default welcome page used to test the correct operation of the Apache2 server after installation on Debian systems. If you can read this page, it means that the Apache HTTP server installed at this site is working properly. You should replace this file (located at /var/www/html/index.html ) before continuing to operate your HTTP server. If you are a normal user of this web site and don't know what this page is about, this probably means that the site is currently unavailable due to maintenance. If the problem persists, please contact the site's administrator. Configuration Overview Debian's Apache2 default configuration is different from the upstream default configuration, and split into several files optimized for interaction with Debian tools. The configuration system is fully documented in /usr/share/doc/apache2/README.Debian.gz . Refer to this for the full documentation. Documentation for the web server itself can be found by accessing the manual if the apache2-doc package was installed on this server. The configuration layout for an Apache2 web server installation on Debian systems is as follows: /etc/apache2/ |-- apache2.conf | `-- ports.conf |-- mods-enabled | |-- *.load | `-- *.conf |-- conf-enabled | `-- *.conf |-- sites-enabled | `-- *.conf apache2.conf is the main configuration file. It puts the pieces together by including all remaining configuration files when starting up the web server. ports.conf is always included from the main configuration file. It is used to determine the listening ports for incoming connections, and this file can be customized anytime. Configuration files in the mods-enabled/ , conf-enabled/ and sites-enabled/ directories contain particular configuration snippets which manage modules, global configuration fragments, or virtual host configurations, respectively. They are activated by symlinking available configuration files from their respective *-available/ counterparts. These should be managed by using our helpers a2enmod, a2dismod, a2ensite, a2dissite, and a2enconf, a2disconf . See their respective man pages for detailed information. The binary is called apache2. Due to the use of environment variables, in the default configuration, apache2 needs to be started/stopped with /etc/init.d/apache2 or apache2ctl . Calling /usr/bin/apache2 directly will not work with the default configuration. Document Roots By default, Debian does not allow access through the web browser to any file apart of those located in /var/www , public_html directories (when enabled) and /usr/share (for web applications). If your site is using a web document root located elsewhere (such as in /srv ) you may need to whitelist your document root directory in /etc/apache2/apache2.conf . The default Debian document root is /var/www/html . You can make your own virtual hosts under /var/www. This is different to previous releases which provides better security out of the box. Reporting Problems Please use the reportbug tool to report bugs in the Apache2 package with Debian. However, check existing bug reports before reporting a new bug. Please report bugs specific to modules (such as PHP and others) to respective packages, not to the web server itself.
Date: Tue, 04 May 2021 10:42:48 GMT
Server: Apache/2.4.38 (Debian)
Last-Modified: Thu, 11 Feb 2021 10:16:26 GMT
ETag: "29cd-5bb0ccfef95f8-gzip"
Accept-Ranges: bytes
Vary: Accept-Encoding
Content-Encoding: gzip
Content-Length: 3041
Connection: close
Content-Type: text/html

• http://www.citycomaustria.at:443/
91.143.111.171 GZip used - 3041 / 10701 - 71.58 %
200

Html is minified: 221.60 %
0.067
Q
Visible Content: Apache2 Debian Default Page It works! This is the default welcome page used to test the correct operation of the Apache2 server after installation on Debian systems. If you can read this page, it means that the Apache HTTP server installed at this site is working properly. You should replace this file (located at /var/www/html/index.html ) before continuing to operate your HTTP server. If you are a normal user of this web site and don't know what this page is about, this probably means that the site is currently unavailable due to maintenance. If the problem persists, please contact the site's administrator. Configuration Overview Debian's Apache2 default configuration is different from the upstream default configuration, and split into several files optimized for interaction with Debian tools. The configuration system is fully documented in /usr/share/doc/apache2/README.Debian.gz . Refer to this for the full documentation. Documentation for the web server itself can be found by accessing the manual if the apache2-doc package was installed on this server. The configuration layout for an Apache2 web server installation on Debian systems is as follows: /etc/apache2/ |-- apache2.conf | `-- ports.conf |-- mods-enabled | |-- *.load | `-- *.conf |-- conf-enabled | `-- *.conf |-- sites-enabled | `-- *.conf apache2.conf is the main configuration file. It puts the pieces together by including all remaining configuration files when starting up the web server. ports.conf is always included from the main configuration file. It is used to determine the listening ports for incoming connections, and this file can be customized anytime. Configuration files in the mods-enabled/ , conf-enabled/ and sites-enabled/ directories contain particular configuration snippets which manage modules, global configuration fragments, or virtual host configurations, respectively. They are activated by symlinking available configuration files from their respective *-available/ counterparts. These should be managed by using our helpers a2enmod, a2dismod, a2ensite, a2dissite, and a2enconf, a2disconf . See their respective man pages for detailed information. The binary is called apache2. Due to the use of environment variables, in the default configuration, apache2 needs to be started/stopped with /etc/init.d/apache2 or apache2ctl . Calling /usr/bin/apache2 directly will not work with the default configuration. Document Roots By default, Debian does not allow access through the web browser to any file apart of those located in /var/www , public_html directories (when enabled) and /usr/share (for web applications). If your site is using a web document root located elsewhere (such as in /srv ) you may need to whitelist your document root directory in /etc/apache2/apache2.conf . The default Debian document root is /var/www/html . You can make your own virtual hosts under /var/www. This is different to previous releases which provides better security out of the box. Reporting Problems Please use the reportbug tool to report bugs in the Apache2 package with Debian. However, check existing bug reports before reporting a new bug. Please report bugs specific to modules (such as PHP and others) to respective packages, not to the web server itself.
Date: Tue, 04 May 2021 10:42:48 GMT
Server: Apache/2.4.38 (Debian)
Last-Modified: Thu, 11 Feb 2021 10:16:26 GMT
ETag: "29cd-5bb0ccfef95f8-gzip"
Accept-Ranges: bytes
Vary: Accept-Encoding
Content-Encoding: gzip
Content-Length: 3041
Connection: close
Content-Type: text/html

• http://citycomaustria.at/.well-known/acme-challenge/check-your-website-dot-server-daten-dot-de
91.143.111.171
Inline-JavaScript (∑/total): 0/0 Inline-CSS (∑/total): 0/0
404

Html is minified: 249.45 %
0.063
A
Not Found
Visible Content: ERROR 404 - Not Found! The following error occurred: The requested URL was not found on this server. Please check the URL or contact the webmaster. Powered by ISPConfig
Date: Tue, 04 May 2021 10:42:48 GMT
Server: Apache/2.4.38 (Debian)
Last-Modified: Tue, 04 May 2021 07:38:02 GMT
ETag: "70e-5c17c286f953a"
Accept-Ranges: bytes
Content-Length: 1806
Connection: close
Content-Type: text/html

• http://www.citycomaustria.at/.well-known/acme-challenge/check-your-website-dot-server-daten-dot-de
91.143.111.171
Inline-JavaScript (∑/total): 0/0 Inline-CSS (∑/total): 0/0
404

Html is minified: 249.45 %
0.063
A
Not Found
Visible Content: ERROR 404 - Not Found! The following error occurred: The requested URL was not found on this server. Please check the URL or contact the webmaster. Powered by ISPConfig
Date: Tue, 04 May 2021 10:42:48 GMT
Server: Apache/2.4.38 (Debian)
Last-Modified: Tue, 04 May 2021 07:38:02 GMT
ETag: "70e-5c17c286f953a"
Accept-Ranges: bytes
Content-Length: 1806
Connection: close
Content-Type: text/html

• https://91.143.111.171/
91.143.111.171
-4

0.204
W
SendFailure - The underlying connection was closed: An unexpected error occurred on a send.

7. Comments


1. General Results, most used to calculate the result

Aname "citycomaustria.at" is domain, public suffix is ".at", top-level-domain is ".at", top-level-domain-type is "country-code", Country is Austria, tld-manager is "nic.at GmbH", num .at-domains preloaded: 612 (complete: 151507)
Agood: All ip addresses are public addresses
Warning: Only one ip address found: citycomaustria.at has only one ip address.
Warning: Only one ip address found: www.citycomaustria.at 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: citycomaustria.at has no ipv6 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: www.citycomaustria.at has no ipv6 address.
Agood: No asked Authoritative Name Server had a timeout
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 (6 urls)
http://citycomaustria.at/ 91.143.111.171


Url with incomplete Content-Type - header - missing charset
http://citycomaustria.at:443/ 91.143.111.171


Url with incomplete Content-Type - header - missing charset
http://www.citycomaustria.at:443/ 91.143.111.171


Url with incomplete Content-Type - header - missing charset
http://www.citycomaustria.at/ 91.143.111.171


Url with incomplete Content-Type - header - missing charset
http://citycomaustria.at/.well-known/acme-challenge/check-your-website-dot-server-daten-dot-de 91.143.111.171


Url with incomplete Content-Type - header - missing charset
http://www.citycomaustria.at/.well-known/acme-challenge/check-your-website-dot-server-daten-dot-de 91.143.111.171


Url with incomplete Content-Type - header - missing charset
CError - more then one version with Http-Status 200. After all redirects, all users (and search engines) should see the same https url: Non-www or www, but not both with http status 200.
Hfatal error: No https - result with http-status 200, no encryption
HFatal error: http result with http-status 200, no encryption. Add a redirect http ⇒ https, so every connection is secure. Perhaps in your port 80 vHost something like "RewriteEngine on" + "RewriteRule ^ https://%{SERVER_NAME}%{REQUEST_URI} [END,QSA,R=permanent]" (two rows, without the "). Don't add this in your port 443 vHost, that would create a loop.
Qhttp://citycomaustria.at:443/ 91.143.111.171
200

Misconfiguration: http sent over port 443. Wrong port forwarding port 443 to port 80 or wrong vHost definition. If you use a virtual Host <VirtualHost ip-address:443>, try <VirtualHost *:443>.
Qhttp://www.citycomaustria.at:443/ 91.143.111.171
200

Misconfiguration: http sent over port 443. Wrong port forwarding port 443 to port 80 or wrong vHost definition. If you use a virtual Host <VirtualHost ip-address:443>, try <VirtualHost *:443>.
Info: Checking the ip addresses of that domain name not exact one certificate found. So it's impossible to check if that domain requires Server Name Indication (SNI).: Domain citycomaustria.at, 1 ip addresses.
Info: Checking the ip addresses of that domain name not exact one certificate found. So it's impossible to check if that domain requires Server Name Indication (SNI).: Domain www.citycomaustria.at, 1 ip addresses.

2. DNS- and NameServer - Checks

AInfo:: 2 Root-climbing DNS Queries required to find all IPv4- and IPv6-Addresses of 2 Name Servers.
AInfo:: 2 Queries complete, 2 with IPv6, 0 with IPv4.
AGood: All DNS Queries done via IPv6.
AGood: Some ip addresses of name servers found with the minimum of two DNS Queries. One to find the TLD-Zone, one to ask the TLD-Zone.dns1.grazkom.at (217.29.144.65), dns2.grazkom.at (217.29.144.66)
AGood (1 - 3.0):: An average of 1.0 queries per domain name server required to find all ip addresses of all name servers.
AInfo:: 2 different Name Servers found: dns1.grazkom.at, dns2.grazkom.at, 2 Name Servers included in Delegation: dns1.grazkom.at, dns2.grazkom.at, 2 Name Servers included in 1 Zone definitions: dns1.grazkom.at, dns2.grazkom.at, 1 Name Servers listed in SOA.Primary: dns1.grazkom.at.
AGood: Only one SOA.Primary Name Server found.: dns1.grazkom.at.
AGood: SOA.Primary Name Server included in the delegation set.: dns1.grazkom.at.
AGood: Consistency 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. Ordered list of name servers: dns1.grazkom.at, dns2.grazkom.at
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.
AGood: Minimal 2 different name servers (public suffix and public ip address) found: 2 different Name Servers found
Warning: No Name Server IPv6 address found. IPv6 is the future, so your name servers should be visible via IPv6.: 2 different Name Servers found
Warning: All Name Servers have the same Top Level Domain / Public Suffix. If there is a problem with that Top Level Domain, your domain may be affected. Better: Use Name Servers with different top level domains.: 2 Name Servers, 1 Top Level Domain: at
Warning: All Name Servers have the same domain name. If there is a problem with that domain name (or with the name servers of that domain name), your domain may be affected. Better: Use Name Servers with different domain names / different top level domains.: Only one domain name used: grazkom.at
Warning: All Name Servers from the same Country / IP location.: 2 Name Servers, 1 Countries: AT
AInfo: Ipv4-Subnet-list: 2 Name Servers, 1 different subnets (first Byte): 217., 1 different subnets (first two Bytes): 217.29., 1 different subnets (first three Bytes): 217.29.144.
XFatal: All Name Server IPv4 addresses from the same subnet. Check https://www.iana.org/help/nameserver-requirements to learn some basics about name server configurations. If you manage these name servers, fix it. If it's your provider, change your provider.:
AGood: Nameserver supports TCP connections: 2 good Nameserver
AGood: Nameserver supports Echo Capitalization: 2 good Nameserver
AGood: Nameserver supports EDNS with max. 512 Byte Udp payload, message is smaller: 2 good Nameserver
AGood: Nameserver has passed 10 EDNS-Checks (OP100, FLAGS, V1, V1OP100, V1FLAGS, DNSSEC, V1DNSSEC, NSID, COOKIE, CLIENTSUBNET): 2 good Nameserver
Nameserver doesn't pass all EDNS-Checks: dns.nic.at: 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: 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: 27490 milliseconds, 27.490 seconds


8. Connections

No connection informations found. Perhaps only http - connections.


9. Certificates

No certificate informations found. Perhaps only http - connections.


10. Last Certificates - Certificate Transparency Log Check

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

No CertSpotter - CT-Log entries found


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

No CRT - CT-Log entries found


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: dns1.grazkom.at, dns2.grazkom.at

QNr.DomainTypeNS used
1
at
NS
g.root-servers.net (2001:500:12::d0d)

Answer: d.ns.at, j.ns.at, n.ns.at, ns1.univie.ac.at, ns2.univie.ac.at, ns9.univie.ac.at, r.ns.at, u.ns.at
2
dns1.grazkom.at: 217.29.144.65
NS
d.ns.at (2a02:568:20:1::d)

Answer: dns2.grazkom.at
217.29.144.66


13. CAA - Entries

DomainnameflagNameValue∑ Queries∑ Timeout
www.citycomaustria.at



1
0
citycomaustria.at
0

no CAA entry found
1
0
at
0

no CAA entry found
1
0


14. TXT - Entries

DomainnameTXT EntryStatus∑ Queries∑ Timeout
citycomaustria.at

ok
1
0
www.citycomaustria.at


1
0
_acme-challenge.citycomaustria.at

Name Error - The domain name does not exist
1
0
_acme-challenge.www.citycomaustria.at

Name Error - The domain name does not exist
1
0
_acme-challenge.citycomaustria.at.citycomaustria.at

Name Error - The domain name does not exist
1
0
_acme-challenge.www.citycomaustria.at.citycomaustria.at

Name Error - The domain name does not exist
1
0
_acme-challenge.www.citycomaustria.at.www.citycomaustria.at

Name Error - The domain name does not exist
1
0


15. Portchecks

Domain or IPPortDescriptionResultAnswer
citycomaustria.at
21
FTP
open
220---------- Welcome to Pure-FTPd [privsep] [TLS] ---------- 220-You are user number 1 of 50 allowed. 220-Local time is now 11:42. Server port: 21. 220-This is a private system - No anonymous login 220-IPv6 connections are also welcome on this server. 220 You will be disconnected after 15 minutes of inactivity.

citycomaustria.at
21
FTP
open
220---------- Welcome to Pure-FTPd [privsep] [TLS] ---------- 220-You are user number 1 of 50 allowed. 220-Local time is now 11:42. Server port: 21. 220-This is a private system - No anonymous login 220-IPv6 connections are also welcome on this server. 220 You will be disconnected after 15 minutes of inactivity.

citycomaustria.at
22
SSH



citycomaustria.at
22
SSH



citycomaustria.at
25
SMTP



citycomaustria.at
25
SMTP



citycomaustria.at
53
DNS



citycomaustria.at
53
DNS



citycomaustria.at
110
POP3



citycomaustria.at
110
POP3



citycomaustria.at
143
IMAP



citycomaustria.at
143
IMAP



citycomaustria.at
465
SMTP (encrypted)



citycomaustria.at
465
SMTP (encrypted)



citycomaustria.at
587
SMTP (encrypted, submission)



citycomaustria.at
587
SMTP (encrypted, submission)



citycomaustria.at
993
IMAP (encrypted)



citycomaustria.at
993
IMAP (encrypted)



citycomaustria.at
995
POP3 (encrypted)



citycomaustria.at
995
POP3 (encrypted)



citycomaustria.at
1433
MS SQL



citycomaustria.at
1433
MS SQL



citycomaustria.at
2082
cPanel (http)



citycomaustria.at
2082
cPanel (http)



citycomaustria.at
2083
cPanel (https)



citycomaustria.at
2083
cPanel (https)



citycomaustria.at
2086
WHM (http)



citycomaustria.at
2086
WHM (http)



citycomaustria.at
2087
WHM (https)



citycomaustria.at
2087
WHM (https)



citycomaustria.at
2089
cPanel Licensing



citycomaustria.at
2089
cPanel Licensing



citycomaustria.at
2095
cPanel Webmail (http)



citycomaustria.at
2095
cPanel Webmail (http)



citycomaustria.at
2096
cPanel Webmail (https)



citycomaustria.at
2096
cPanel Webmail (https)



citycomaustria.at
2222
DirectAdmin (http)



citycomaustria.at
2222
DirectAdmin (http)



citycomaustria.at
2222
DirectAdmin (https)



citycomaustria.at
2222
DirectAdmin (https)



citycomaustria.at
3306
mySql



citycomaustria.at
3306
mySql



citycomaustria.at
5224
Plesk Licensing



citycomaustria.at
5224
Plesk Licensing



citycomaustria.at
5432
PostgreSQL



citycomaustria.at
5432
PostgreSQL



citycomaustria.at
8080
Ookla Speedtest (http)



citycomaustria.at
8080
Ookla Speedtest (http)



citycomaustria.at
8080
Ookla Speedtest (https)



citycomaustria.at
8080
Ookla Speedtest (https)



citycomaustria.at
8083
VestaCP http



citycomaustria.at
8083
VestaCP http



citycomaustria.at
8083
VestaCP https



citycomaustria.at
8083
VestaCP https



citycomaustria.at
8443
Plesk Administration (https)



citycomaustria.at
8443
Plesk Administration (https)



citycomaustria.at
8447
Plesk Installer + Updates



citycomaustria.at
8447
Plesk Installer + Updates



citycomaustria.at
8880
Plesk Administration (http)



citycomaustria.at
8880
Plesk Administration (http)



citycomaustria.at
10000
Webmin (http)



citycomaustria.at
10000
Webmin (http)



citycomaustria.at
10000
Webmin (https)



citycomaustria.at
10000
Webmin (https)



www.citycomaustria.at
21
FTP
open
220---------- Welcome to Pure-FTPd [privsep] [TLS] ---------- 220-You are user number 1 of 50 allowed. 220-Local time is now 11:42. Server port: 21. 220-This is a private system - No anonymous login 220-IPv6 connections are also welcome on this server. 220 You will be disconnected after 15 minutes of inactivity.

www.citycomaustria.at
21
FTP
open
220---------- Welcome to Pure-FTPd [privsep] [TLS] ---------- 220-You are user number 1 of 50 allowed. 220-Local time is now 11:42. Server port: 21. 220-This is a private system - No anonymous login 220-IPv6 connections are also welcome on this server. 220 You will be disconnected after 15 minutes of inactivity.

www.citycomaustria.at
22
SSH



www.citycomaustria.at
22
SSH



www.citycomaustria.at
25
SMTP



www.citycomaustria.at
25
SMTP



www.citycomaustria.at
53
DNS



www.citycomaustria.at
53
DNS



www.citycomaustria.at
110
POP3



www.citycomaustria.at
110
POP3



www.citycomaustria.at
143
IMAP



www.citycomaustria.at
143
IMAP



www.citycomaustria.at
465
SMTP (encrypted)



www.citycomaustria.at
465
SMTP (encrypted)



www.citycomaustria.at
587
SMTP (encrypted, submission)



www.citycomaustria.at
587
SMTP (encrypted, submission)



www.citycomaustria.at
993
IMAP (encrypted)



www.citycomaustria.at
993
IMAP (encrypted)



www.citycomaustria.at
995
POP3 (encrypted)



www.citycomaustria.at
995
POP3 (encrypted)



www.citycomaustria.at
1433
MS SQL



www.citycomaustria.at
1433
MS SQL



www.citycomaustria.at
2082
cPanel (http)



www.citycomaustria.at
2082
cPanel (http)



www.citycomaustria.at
2083
cPanel (https)



www.citycomaustria.at
2083
cPanel (https)



www.citycomaustria.at
2086
WHM (http)



www.citycomaustria.at
2086
WHM (http)



www.citycomaustria.at
2087
WHM (https)



www.citycomaustria.at
2087
WHM (https)



www.citycomaustria.at
2089
cPanel Licensing



www.citycomaustria.at
2089
cPanel Licensing



www.citycomaustria.at
2095
cPanel Webmail (http)



www.citycomaustria.at
2095
cPanel Webmail (http)



www.citycomaustria.at
2096
cPanel Webmail (https)



www.citycomaustria.at
2096
cPanel Webmail (https)



www.citycomaustria.at
2222
DirectAdmin (http)



www.citycomaustria.at
2222
DirectAdmin (http)



www.citycomaustria.at
2222
DirectAdmin (https)



www.citycomaustria.at
2222
DirectAdmin (https)



www.citycomaustria.at
3306
mySql



www.citycomaustria.at
3306
mySql



www.citycomaustria.at
5224
Plesk Licensing



www.citycomaustria.at
5224
Plesk Licensing



www.citycomaustria.at
5432
PostgreSQL



www.citycomaustria.at
5432
PostgreSQL



www.citycomaustria.at
8080
Ookla Speedtest (http)



www.citycomaustria.at
8080
Ookla Speedtest (http)



www.citycomaustria.at
8080
Ookla Speedtest (https)



www.citycomaustria.at
8080
Ookla Speedtest (https)



www.citycomaustria.at
8083
VestaCP http



www.citycomaustria.at
8083
VestaCP http



www.citycomaustria.at
8083
VestaCP https



www.citycomaustria.at
8083
VestaCP https



www.citycomaustria.at
8443
Plesk Administration (https)



www.citycomaustria.at
8443
Plesk Administration (https)



www.citycomaustria.at
8447
Plesk Installer + Updates



www.citycomaustria.at
8447
Plesk Installer + Updates



www.citycomaustria.at
8880
Plesk Administration (http)



www.citycomaustria.at
8880
Plesk Administration (http)



www.citycomaustria.at
10000
Webmin (http)



www.citycomaustria.at
10000
Webmin (http)



www.citycomaustria.at
10000
Webmin (https)



www.citycomaustria.at
10000
Webmin (https)



91.143.111.171
21
FTP
open
220---------- Welcome to Pure-FTPd [privsep] [TLS] ---------- 220-You are user number 1 of 50 allowed. 220-Local time is now 11:42. Server port: 21. 220-This is a private system - No anonymous login 220-IPv6 connections are also welcome on this server. 220 You will be disconnected after 15 minutes of inactivity.

91.143.111.171
21
FTP
open
220---------- Welcome to Pure-FTPd [privsep] [TLS] ---------- 220-You are user number 1 of 50 allowed. 220-Local time is now 11:42. Server port: 21. 220-This is a private system - No anonymous login 220-IPv6 connections are also welcome on this server. 220 You will be disconnected after 15 minutes of inactivity.

91.143.111.171
22
SSH



91.143.111.171
22
SSH



91.143.111.171
25
SMTP



91.143.111.171
25
SMTP



91.143.111.171
53
DNS



91.143.111.171
53
DNS



91.143.111.171
110
POP3



91.143.111.171
110
POP3



91.143.111.171
143
IMAP



91.143.111.171
143
IMAP



91.143.111.171
465
SMTP (encrypted)



91.143.111.171
465
SMTP (encrypted)



91.143.111.171
587
SMTP (encrypted, submission)



91.143.111.171
587
SMTP (encrypted, submission)



91.143.111.171
993
IMAP (encrypted)



91.143.111.171
993
IMAP (encrypted)



91.143.111.171
995
POP3 (encrypted)



91.143.111.171
995
POP3 (encrypted)



91.143.111.171
1433
MS SQL



91.143.111.171
1433
MS SQL



91.143.111.171
2082
cPanel (http)



91.143.111.171
2082
cPanel (http)



91.143.111.171
2083
cPanel (https)



91.143.111.171
2083
cPanel (https)



91.143.111.171
2086
WHM (http)



91.143.111.171
2086
WHM (http)



91.143.111.171
2087
WHM (https)



91.143.111.171
2087
WHM (https)



91.143.111.171
2089
cPanel Licensing



91.143.111.171
2089
cPanel Licensing



91.143.111.171
2095
cPanel Webmail (http)



91.143.111.171
2095
cPanel Webmail (http)



91.143.111.171
2096
cPanel Webmail (https)



91.143.111.171
2096
cPanel Webmail (https)



91.143.111.171
2222
DirectAdmin (http)



91.143.111.171
2222
DirectAdmin (http)



91.143.111.171
2222
DirectAdmin (https)



91.143.111.171
2222
DirectAdmin (https)



91.143.111.171
3306
mySql



91.143.111.171
3306
mySql



91.143.111.171
5224
Plesk Licensing



91.143.111.171
5224
Plesk Licensing



91.143.111.171
5432
PostgreSQL



91.143.111.171
5432
PostgreSQL



91.143.111.171
8080
Ookla Speedtest (http)



91.143.111.171
8080
Ookla Speedtest (http)



91.143.111.171
8080
Ookla Speedtest (https)



91.143.111.171
8080
Ookla Speedtest (https)



91.143.111.171
8083
VestaCP http



91.143.111.171
8083
VestaCP http



91.143.111.171
8083
VestaCP https



91.143.111.171
8083
VestaCP https



91.143.111.171
8443
Plesk Administration (https)



91.143.111.171
8443
Plesk Administration (https)



91.143.111.171
8447
Plesk Installer + Updates



91.143.111.171
8447
Plesk Installer + Updates



91.143.111.171
8880
Plesk Administration (http)



91.143.111.171
8880
Plesk Administration (http)



91.143.111.171
10000
Webmin (http)



91.143.111.171
10000
Webmin (http)



91.143.111.171
10000
Webmin (https)



91.143.111.171
10000
Webmin (https)





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