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


 

 

Q

 

http sent over port 443

 

Checked:
04.02.2025 15:59:30

 

Older results

No older results found

 

1. IP-Addresses

HostTypeIP-Addressis auth.∑ Queries∑ Timeout
system64.cz
A
138.199.152.100
Falkenstein/Saxony/Germany (DE) - Hetzner Online GmbH
Hostname: static.100.152.199.138.clients.your-server.de
yes
1
0

AAAA

yes


www.system64.cz
A
138.199.152.100
Falkenstein/Saxony/Germany (DE) - Hetzner Online GmbH
Hostname: static.100.152.199.138.clients.your-server.de
yes
1
0

AAAA

yes


*.system64.cz
A
138.199.152.100
yes



AAAA

yes



CNAME
system64.cz
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






3 DNSKEY RR found






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






Public Key with Algorithm 8, KeyTag 26470, Flags 256






Public Key with Algorithm 8, KeyTag 38696, 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: 21.02.2025, 00:00:00 +, Signature-Inception: 31.01.2025, 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: cz

cz
1 DS RR in the parent zone found






DS with Algorithm 13, KeyTag 20237, DigestType 2 and Digest z/Dz7NvFKcHwAxuhhAv7g1hTuSCe0eUI//SEUde3eOI=






1 RRSIG RR to validate DS RR found






RRSIG-Owner cz., Algorithm: 8, 1 Labels, original TTL: 86400 sec, Signature-expiration: 17.02.2025, 05:00:00 +, Signature-Inception: 04.02.2025, 04:00:00 +, KeyTag 26470, Signer-Name: (root)






Status: Good - Algorithmus 8 and DNSKEY with KeyTag 26470 used to validate the DS RRSet in the parent zone






2 DNSKEY RR found






Public Key with Algorithm 13, KeyTag 20237, Flags 257 (SEP = Secure Entry Point)






Public Key with Algorithm 13, KeyTag 27480, Flags 256






1 RRSIG RR to validate DNSKEY RR found






RRSIG-Owner cz., Algorithm: 13, 1 Labels, original TTL: 3600 sec, Signature-expiration: 16.02.2025, 08:32:43 +, Signature-Inception: 02.02.2025, 07:02:43 +, KeyTag 20237, Signer-Name: cz






Status: Good - Algorithmus 13 and DNSKEY with KeyTag 20237 used to validate the DNSKEY RRSet






Status: Valid Chain of trust. Parent-DS with Algorithm 13, KeyTag 20237, DigestType 2 and Digest "z/Dz7NvFKcHwAxuhhAv7g1hTuSCe0eUI//SEUde3eOI=" validates local Key with the same values, Key ist Secure Entry Point (SEP) of the zone



Zone: system64.cz

system64.cz
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 "7mdtofek276aabe7ot9tc2rhamstms6r" between the hashed NSEC3-owner "7mdtofek276aabe7ot9tc2rhamstms6r" and the hashed NextOwner "7mdtvndppcstfti1lstk8ssd0biauvor". So the parent zone confirmes the not-existence of a DS RR.
Bitmap: No Bitmap? Validated: RRSIG-Owner 7mdtofek276aabe7ot9tc2rhamstms6r.cz., Algorithm: 13, 2 Labels, original TTL: 900 sec, Signature-expiration: 13.02.2025, 20:21:34 +, Signature-Inception: 30.01.2025, 18:51:34 +, KeyTag 27480, Signer-Name: cz






0 DNSKEY RR found









Zone: www.system64.cz

www.system64.cz
0 DS RR in the parent zone found

 

3. Name Servers

DomainNameserverNS-IP
www.system64.cz
  ns.forpsi.net / dns-slave-1.forpsi.org

system64.cz
  ns.forpsi.cz / dns-slave-2.forpsi.org
81.2.209.185
Prague/Czechia (CZ) - INTERNET CZ


 
2001:15e8:201:1::d1b9
Ktiš/Jihočeský kraj/Czechia (CZ) - INTERNET CZ


  ns.forpsi.it / dns-slave-3
95.110.254.165
Ponte San Pietro/Lombardy/Italy (IT) - Aruba S.p.A. Network


 
2a00:6d41:2:1::5
Arezzo/Tuscany/Italy (IT) - Aruba S.p.A. Network


  ns.forpsi.net / dns-slave-1.forpsi.org
81.2.194.130
Prague/Czechia (CZ) - INTERNET CZ


 
2001:15e8:101:1::c282
Ktiš/Jihočeský kraj/Czechia (CZ) - INTERNET CZ

cz
  a.ns.nic.cz / dns-jinx-02.nic.cz


  b.ns.nic.cz / dns-sgix-01.nic.cz


  c.ns.nic.cz / dns-linx-dns03.nic.cz


  d.ns.nic.cz / dns-sgix-02.nic.cz

 

4. SOA-Entries


Domain:cz
Zone-Name:cz
Primary:a.ns.nic.cz
Mail:hostmaster.nic.cz
Serial:1738680414
Refresh:900
Retry:300
Expire:604800
TTL:900
num Entries:4


Domain:system64.cz
Zone-Name:system64.cz
Primary:ns.forpsi.net
Mail:admin.forpsi.com
Serial:2025020202
Refresh:14400
Retry:3600
Expire:2592000
TTL:3600
num Entries:6


Domain:www.system64.cz
Zone-Name:system64.cz
Primary:ns.forpsi.net
Mail:admin.forpsi.com
Serial:2025020202
Refresh:14400
Retry:3600
Expire:2592000
TTL:3600
num Entries:1


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://system64.cz/
138.199.152.100
301
https://system64.cz/
Html is minified: 103.04 %
0.046
A
Date: Tue, 04 Feb 2025 15:00:17 GMT
Server: Apache/2.4.62,(Debian)
Location: https://system64.cz/
Content-Length: 305
Content-Type: text/html; charset=iso-8859-1

• http://www.system64.cz/
138.199.152.100
301
https://www.system64.cz/
Html is minified: 102.96 %
0.016
A
Date: Tue, 04 Feb 2025 15:00:17 GMT
Server: Apache/2.4.62,(Debian)
Location: https://www.system64.cz/
Content-Length: 313
Content-Type: text/html; charset=iso-8859-1

• https://system64.cz/
138.199.152.100
-103


0.063
P
SecureConnectionError (3, 0x80131501). The SSL connection could not be established, see inner exception. Cannot determine the frame size or a corrupted frame was received

• https://www.system64.cz/
138.199.152.100
-103


0.064
P
SecureConnectionError (3, 0x80131501). The SSL connection could not be established, see inner exception. Cannot determine the frame size or a corrupted frame was received

• http://system64.cz:443/
138.199.152.100
200

Html is minified: 106.45 %
0.050
Q
Visible Content:
Date: Tue, 04 Feb 2025 15:00:17 GMT
Server: Apache/2.4.62,(Debian)
Content-Length: 66
Content-Type: text/html; charset=UTF-8

• http://www.system64.cz:443/
138.199.152.100
200

Html is minified: 106.45 %
0.017
Q
Visible Content:
Date: Tue, 04 Feb 2025 15:00:17 GMT
Server: Apache/2.4.62,(Debian)
Content-Length: 66
Content-Type: text/html; charset=UTF-8

• http://system64.cz/.well-known/acme-challenge/check-your-website-dot-server-daten-dot-de
138.199.152.100
Inline-JavaScript (∑/total): 0/0 Inline-CSS (∑/total): 0/0
301
https://system64.cz/.well-known/acme-challenge/check-your-website-dot-server-daten-dot-de
Html is minified: 102.47 %
Other inline scripts (∑/total): 0/0
0.013
A
Visible Content:
Date: Tue, 04 Feb 2025 15:00:17 GMT
Server: Apache/2.4.62,(Debian)
Location: https://system64.cz/.well-known/acme-challenge/check-your-website-dot-server-daten-dot-de
Content-Length: 374
Content-Type: text/html; charset=iso-8859-1

• http://www.system64.cz/.well-known/acme-challenge/check-your-website-dot-server-daten-dot-de
138.199.152.100
Inline-JavaScript (∑/total): 0/0 Inline-CSS (∑/total): 0/0
301
https://www.system64.cz/.well-known/acme-challenge/check-your-website-dot-server-daten-dot-de
Html is minified: 102.41 %
Other inline scripts (∑/total): 0/0
0.030
A
Visible Content:
Date: Tue, 04 Feb 2025 15:00:17 GMT
Server: Apache/2.4.62,(Debian)
Location: https://www.system64.cz/.well-known/acme-challenge/check-your-website-dot-server-daten-dot-de
Content-Length: 382
Content-Type: text/html; charset=iso-8859-1

• https://system64.cz/.well-known/acme-challenge/check-your-website-dot-server-daten-dot-de

-103


0.063
P
SecureConnectionError (3, 0x80131501). The SSL connection could not be established, see inner exception. Cannot determine the frame size or a corrupted frame was received
Visible Content:

• https://www.system64.cz/.well-known/acme-challenge/check-your-website-dot-server-daten-dot-de

-103


0.047
P
SecureConnectionError (3, 0x80131501). The SSL connection could not be established, see inner exception. Cannot determine the frame size or a corrupted frame was received
Visible Content:

• https://138.199.152.100/
138.199.152.100
-103


0.064
P
SecureConnectionError (3, 0x80131501). The SSL connection could not be established, see inner exception. Cannot determine the frame size or a corrupted frame was received

 

7. Comments


1. General Results, most used to calculate the result

Aname "system64.cz" is domain, public suffix is ".cz", top-level-domain is ".cz", top-level-domain-type is "country-code", Country is Czechia, tld-manager is "CZ.NIC, z.s.p.o", num .cz-domains preloaded: 2224 (complete: 263653)
AGood: All ip addresses are public addresses
Warning: Only one ip address found: system64.cz has only one ip address.
Warning: Only one ip address found: www.system64.cz 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: system64.cz 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.system64.cz 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: All urls with http status 200/404 have a complete Content-Type header (MediaType / MediaSubType + correct charset)
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://system64.cz:443/ 138.199.152.100
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.system64.cz:443/ 138.199.152.100
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 system64.cz, 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.system64.cz, 1 ip addresses.
BNo _mta-sts TXT record found (mta-sts: Mail Transfer Agent Strict Transport Security - see RFC 8461). Read the result of server-daten.de (Url-Checks, Comments, Connections and DomainServiceRecords) to see a complete definition. Domainname: _mta-sts.system64.cz

2. Header-Checks

U

No https result with http status 2** or 4** (standard-check) found, no header checked.

3. DNS- and NameServer - Checks

AInfo:: 6 Root-climbing DNS Queries required to find all IPv4- and IPv6-Addresses of 3 Name Servers.
AInfo:: 6 Queries complete, 6 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.ns.forpsi.cz (2001:15e8:201:1::d1b9, 81.2.209.185), ns.forpsi.it (2a00:6d41:2:1::5, 95.110.254.165), ns.forpsi.net (81.2.194.130)
AGood (1 - 3.0):: An average of 2.0 queries per domain name server required to find all ip addresses of all name servers.
AInfo:: 3 different Name Servers found: ns.forpsi.cz, ns.forpsi.it, ns.forpsi.net, 3 Name Servers included in Delegation: ns.forpsi.cz, ns.forpsi.it, ns.forpsi.net, 3 Name Servers included in 1 Zone definitions: ns.forpsi.cz, ns.forpsi.it, ns.forpsi.net, 1 Name Servers listed in SOA.Primary: ns.forpsi.net.
AGood: Only one SOA.Primary Name Server found.: ns.forpsi.net.
AGood: SOA.Primary Name Server included in the delegation set.: ns.forpsi.net.
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: ns.forpsi.cz, ns.forpsi.it, ns.forpsi.net
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: 3 different Name Servers found
AGood: All name servers have ipv4- and ipv6-addresses.: 3 different Name Servers found
AGood: Name servers with different Top Level Domains / Public Suffix List entries found: 3 Name Servers, 3 Top Level Domains: it, cz, net
AGood: Name Servers with different domain names found.: 3 different Domains found
AGood: Name servers with different Country locations found: 3 Name Servers, 2 Countries: CZ, IT
AInfo: Ipv4-Subnet-list: 3 Name Servers, 2 different subnets (first Byte): 81., 95., 2 different subnets (first two Bytes): 81.2., 95.110., 3 different subnets (first three Bytes): 81.2.194., 81.2.209., 95.110.254.
AGood: Name Server IPv4-addresses from different subnet found:
AInfo: IPv6-Subnet-list: 3 Name Servers with IPv6, 2 different subnets (first block): 2001:, 2a00:, 2 different subnets (first two blocks): 2001:15e8:, 2a00:6d41:, 3 different subnets (first three blocks): 2001:15e8:0101:, 2001:15e8:0201:, 2a00:6d41:0002:, 3 different subnets (first four blocks): 2001:15e8:0101:0001:, 2001:15e8:0201:0001:, 2a00:6d41:0002:0001:
AGood: Name Server IPv6 addresses from different subnets found.
AGood: Nameserver supports TCP connections: 6 good Nameserver
AGood: Nameserver supports Echo Capitalization: 6 good Nameserver
AGood: Nameserver supports EDNS with max. 512 Byte Udp payload, message is smaller: 6 good Nameserver
AGood: Nameserver has passed 10 EDNS-Checks (OP100, FLAGS, V1, V1OP100, V1FLAGS, DNSSEC, V1DNSSEC, NSID, COOKIE, CLIENTSUBNET): 6 good Nameserver
AGood: All SOA have the same Serial Number
Warning: No CAA entry with issue/issuewild found, every CAA can create a certificate. Read https://en.wikipedia.org/wiki/DNS_Certification_Authority_Authorization to learn some basics about the idea of CAA. Your name server must support such an entry. Not all dns providers support CAA entries.

4. Content- and Performance-critical Checks

https://system64.cz/.well-known/acme-challenge/check-your-website-dot-server-daten-dot-de
-103

Fatal: Check of /.well-known/acme-challenge/random-filename is blocked, http connection error. Creating a Letsencrypt certificate via http-01 challenge can't work. You need a running webserver (http) and an open port 80. If it's a home server + ipv4, perhaps a correct port forwarding port 80 extern ⇒ working port intern is required. Port 80 / http can redirect to another domain port 80 or port 443, but not other ports. If it's a home server, perhaps your ISP blocks port 80. Then you may use the dns-01 challenge. Trouble creating a certificate? Use https://community.letsencrypt.org/ to ask.
https://www.system64.cz/.well-known/acme-challenge/check-your-website-dot-server-daten-dot-de
-103

Fatal: Check of /.well-known/acme-challenge/random-filename is blocked, http connection error. Creating a Letsencrypt certificate via http-01 challenge can't work. You need a running webserver (http) and an open port 80. If it's a home server + ipv4, perhaps a correct port forwarding port 80 extern ⇒ working port intern is required. Port 80 / http can redirect to another domain port 80 or port 443, but not other ports. If it's a home server, perhaps your ISP blocks port 80. Then you may use the dns-01 challenge. 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: 111807 milliseconds, 111.807 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)

Issuerlast 7 daysactivenum Certs
CN=E6, O=Let's Encrypt, C=US
0
1
1

CertSpotter-IdIssuernot beforenot afterDomain namesLE-Duplicatenext LE
9392651140
leaf cert
CN=E6, O=Let's Encrypt, C=US
2025-02-02 19:53:43
2025-05-03 19:53:42
system64.cz, www.system64.cz - 2 entries


 

2. Source crt.sh - old and new certificates, sometimes very slow - only certificates with "not after" > of the last months 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. Html-Parsing via https://validator.w3.org/nu/


No https result http status 200 and Content-Type text/html or text/xml found, no Html-Parsing - Check

 

13. Nameserver - IP-Adresses

Required Root-climbing DNS-Queries to find ip addresses of all Name Servers: ns.forpsi.cz, ns.forpsi.it, ns.forpsi.net

 

QNr.DomainTypeNS used
1
cz
NS
a.root-servers.net (2001:503:ba3e::2:30)

Answer: a.ns.nic.cz, b.ns.nic.cz, c.ns.nic.cz, d.ns.nic.cz
2
ns.forpsi.cz: 2001:15e8:201:1::d1b9, 81.2.209.185
NS
a.ns.nic.cz (2001:678:f::1)
3
it
NS
e.root-servers.net (2001:500:a8::e)

Answer: a.dns.it, dns.nic.it, m.dns.it, nameserver.cnr.it, r.dns.it, v.dns.it
4
ns.forpsi.it: 2a00:6d41:2:1::5, 95.110.254.165
NS
a.dns.it (2001:678:12:0:194:0:16:215)
5
net
NS
g.root-servers.net (2001:500:12::d0d)

Answer: a.gtld-servers.net, b.gtld-servers.net, c.gtld-servers.net, d.gtld-servers.net, e.gtld-servers.net, f.gtld-servers.net, g.gtld-servers.net, h.gtld-servers.net, i.gtld-servers.net, j.gtld-servers.net, k.gtld-servers.net, l.gtld-servers.net, m.gtld-servers.net
6
ns.forpsi.net: 81.2.194.130
NS
l.gtld-servers.net (2001:500:d937::30)

 

14. CAA - Entries

DomainnameflagNameValue∑ Queries∑ Timeout
www.system64.cz
0

no CAA entry found
1
0
system64.cz
0

no CAA entry found
1
0
cz
0

no CAA entry found
1
0

 

15. TXT - Entries

DomainnameTXT EntryStatus∑ Queries∑ Timeout
system64.cz

ok
1
0
www.system64.cz

ok
1
0
_acme-challenge.system64.cz


1
0
_acme-challenge.www.system64.cz

Name Error - The domain name does not exist
1
0
_acme-challenge.system64.cz.system64.cz


1
0
_acme-challenge.www.system64.cz.system64.cz


1
0
_acme-challenge.www.system64.cz.www.system64.cz

Name Error - The domain name does not exist
1
0

 

16. DomainService - Entries

TypeDomainPrefValueDNS-errornum AnswersStatusDescription
_mta-sts
CNAME
_mta-sts.system64.cz

system64.cz
ok

 

 

17. Cipher Suites

No results

 

18. Portchecks

No open Ports <> 80 / 443 found, so no additional Ports checked.

 

 

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Last Result: https://check-your-website.server-daten.de/?q=system64.cz - 2025-02-04 15:59:30

 

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