| 1. General Results, most used to calculate the result |
| A | name "letsg5122.dd-dns.de" is domain, public suffix is ".dd-dns.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: 9732 (complete: 245733)
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| A | Good: All ip addresses are public addresses
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| Warning: Only one ip address found: letsg5122.dd-dns.de has only one ip address.
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| Warning: Only one ip address found: www.letsg5122.dd-dns.de has only one ip address.
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| 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: letsg5122.dd-dns.de has no ipv6 address.
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| 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.letsg5122.dd-dns.de has no ipv6 address.
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| A | Good: No asked Authoritative Name Server had a timeout
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| A | Good: No cookie sent via http.
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| HSTS-Preload-Status: unknown. Domain never included in the Preload-list. Check https://hstspreload.org/ to learn some basics about the Google-Preload-List.
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| A | Good: Some urls with http status 200/404 have a complete Content-Type header (MediaType / MediaSubType + correct charset):0 complete Content-Type - header (6 urls)
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| http://www.letsg5122.dd-dns.de/ 165.232.169.151
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| Url with incomplete Content-Type - header - missing charset
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| https://letsg5122.dd-dns.de/ 165.232.169.151
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| Url with incomplete Content-Type - header - missing charset
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| https://www.letsg5122.dd-dns.de/ 165.232.169.151
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| Url with incomplete Content-Type - header - missing charset
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| http://www.letsg5122.dd-dns.de/.well-known/acme-challenge/check-your-website-dot-server-daten-dot-de 165.232.169.151
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| Url with incomplete Content-Type - header - missing charset
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| https://letsg5122.dd-dns.de/.well-known/acme-challenge/check-your-website-dot-server-daten-dot-de
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| Url with incomplete Content-Type - header - missing charset
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| https://165.232.169.151/ 165.232.169.151
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| Url with incomplete Content-Type - header - missing charset
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| A | http://letsg5122.dd-dns.de/ 165.232.169.151
| https://letsg5122.dd-dns.de/
| Correct redirect http - https with the same domain name
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| B | https://letsg5122.dd-dns.de/ 165.232.169.151
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| Missing HSTS-Header
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| B | https://www.letsg5122.dd-dns.de/ 165.232.169.151
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| Missing HSTS-Header
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| B | https://letsg5122.dd-dns.de/.well-known/acme-challenge/check-your-website-dot-server-daten-dot-de
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| Missing HSTS-Header
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| C | Error - no preferred version www or non-www. Select one version as preferred version, then add a redirect https + not-preferred version to https + preferred version. Perhaps in your port 443 vHost something like "RewriteEngine on" + "RewriteCond %{SERVER_NAME} = example.com" + "ReWriteRule ^ https://www.example.com%{REQUEST_URI} [END,QSA,R=permanent]" (three rows, without the "). That should create a redirect https + example.com ⇒ https + www.example.com. Or switch both values to use the non-www version as your preferred version.
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| C | Error - 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.
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| H | Fatal 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.
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| N | https://www.letsg5122.dd-dns.de/ 165.232.169.151
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| Error - Certificate isn't trusted, RemoteCertificateNameMismatch
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| N | https://165.232.169.151/ 165.232.169.151
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| Error - Certificate isn't trusted, RemoteCertificateNameMismatch
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| X | Fatal error: Nameserver doesn't support TCP connection: f.nic.de: Fatal error (-14). Details: Unable to read data from the transport connection: Eine vorhandene Verbindung wurde vom Remotehost geschlossen.. - Eine vorhandene Verbindung wurde vom Remotehost geschlossen.
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| X | Fatal error: Nameserver doesn't support TCP connection: h2-045.net.crns.de / 83.246.77.45: Timeout
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| X | Fatal error: Nameserver doesn't support TCP connection: l.de.net: Fatal error (-14). Details: Unable to read data from the transport connection: Eine vorhandene Verbindung wurde vom Remotehost geschlossen.. - Eine vorhandene Verbindung wurde vom Remotehost geschlossen.
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| 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 letsg5122.dd-dns.de, 1 ip addresses, 1 different http results.
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| 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 www.letsg5122.dd-dns.de, 1 ip addresses, 1 different http results.
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| B | No _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.letsg5122.dd-dns.de
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| 2. Header-Checks (Cross-Origin-* headers are alpha - started 2024-06-05) |
| A | letsg5122.dd-dns.de 165.232.169.151
| Cross-Origin-Embedder-Policy
| Ok: Header without syntax errors found: require-corp
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| A |
| Cross-Origin-Opener-Policy
| Ok: Header without syntax errors found: same-origin
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| A | www.letsg5122.dd-dns.de 165.232.169.151
| Cross-Origin-Embedder-Policy
| Ok: Header without syntax errors found: require-corp
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| A |
| Cross-Origin-Opener-Policy
| Ok: Header without syntax errors found: same-origin
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| F | letsg5122.dd-dns.de 165.232.169.151
| Content-Security-Policy
| Critical: Missing Header:
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| F | letsg5122.dd-dns.de 165.232.169.151
| X-Content-Type-Options
| Critical: Missing Header:
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| F | letsg5122.dd-dns.de 165.232.169.151
| Referrer-Policy
| Critical: Missing Header:
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| F | letsg5122.dd-dns.de 165.232.169.151
| Permissions-Policy
| Critical: Missing Header:
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| B | letsg5122.dd-dns.de 165.232.169.151
| Cross-Origin-Resource-Policy
| Info: Missing Header
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| F | www.letsg5122.dd-dns.de 165.232.169.151
| Content-Security-Policy
| Critical: Missing Header:
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| F | www.letsg5122.dd-dns.de 165.232.169.151
| X-Content-Type-Options
| Critical: Missing Header:
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| F | www.letsg5122.dd-dns.de 165.232.169.151
| Referrer-Policy
| Critical: Missing Header:
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| F | www.letsg5122.dd-dns.de 165.232.169.151
| Permissions-Policy
| Critical: Missing Header:
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| B | www.letsg5122.dd-dns.de 165.232.169.151
| Cross-Origin-Resource-Policy
| Info: Missing Header
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| 3. DNS- and NameServer - Checks |
| A | Info:: 9 Root-climbing DNS Queries required to find all IPv4- and IPv6-Addresses of 2 Name Servers.
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| A | Info:: 9 Queries complete, 5 with IPv6, 4 with IPv4.
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| Warning: Only some DNS Queries done via ipv6. IPv6 is the future, so the name servers of your name servers should have ipv6 addresses.
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| Ok (4 - 8):: An average of 4.5 queries per domain name server required to find all ip addresses of all name servers.
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| A | Info:: 3 different Name Servers found: h2-045.net.crns.de, localhost, ns2.crns.de, 2 Name Servers included in Delegation: h2-045.net.crns.de, ns2.crns.de, 2 Name Servers included in 2 Zone definitions: h2-045.net.crns.de, ns2.crns.de, 1 Name Servers listed in SOA.Primary: localhost.
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| A | Good: Only one SOA.Primary Name Server found.: localhost.
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| Error: SOA.Primary Name Server not included in the delegation set.: localhost.
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| A | Info: Ipv4-Subnet-list: 2 Name Servers, 1 different subnets (first Byte): 83., 1 different subnets (first two Bytes): 83.246., 2 different subnets (first three Bytes): 83.246.76., 83.246.77.
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| A | Good: Name Server IPv4-addresses from different subnet found:
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| A | Good: Nameserver supports Echo Capitalization: 2 good Nameserver
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| A | Good: Nameserver supports EDNS with max. 512 Byte Udp payload, message is smaller: 2 good Nameserver
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| Nameserver doesn't pass all EDNS-Checks: h2-045.net.crns.de / 83.246.77.45: OP100: ok. FLAGS: ok. V1: SOA NOT expected, but found, BADVER expected, NOERR found, Version 0 expectend and found. V1OP100: SOA NOT expected, but found, BADVER expected, NOERR found, Version 0 expectend and found, no OPT100 expected, no OPT100 found. V1FLAGS: SOA NOT expected, but found, BADVER expected, NOERR found, Version 0 expectend and found. DNSSEC: ok. V1DNSSEC: SOA NOT expected, but found, BADVER expected, NOERR found, Version 0 expectend and found. NSID: ok (ns2.crns.de). COOKIE: ok. CLIENTSUBNET: ok.
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| Nameserver doesn't pass all EDNS-Checks: localhost: 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.
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| Nameserver doesn't pass all EDNS-Checks: localhost: 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.
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| Nameserver doesn't pass all EDNS-Checks: localhost: 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.
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| Nameserver doesn't pass all EDNS-Checks: ns2.crns.de / 83.246.76.144: OP100: ok. FLAGS: ok. V1: SOA NOT expected, but found, BADVER expected, NOERR found, Version 0 expectend and found. V1OP100: SOA NOT expected, but found, BADVER expected, NOERR found, Version 0 expectend and found, no OPT100 expected, no OPT100 found. V1FLAGS: SOA NOT expected, but found, BADVER expected, NOERR found, Version 0 expectend and found. DNSSEC: ok. V1DNSSEC: SOA NOT expected, but found, BADVER expected, NOERR found, Version 0 expectend and found. NSID: ok (ns2.crns.de). COOKIE: ok. CLIENTSUBNET: ok.
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| A | Good: All SOA have the same Serial Number
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| 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.
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| 4. Content- and Performance-critical Checks |
| A | Good: 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.
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| A | Good: No https + http status 200 with inline CSS / JavaScript found
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| A | Good: Every https result with status 200 has a minified Html-Content with a quota lower then 110 %.
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| A | Good: Every https connection via port 443 supports the http/2 protocol via ALPN.
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| A | Good: All checked attribute values are enclosed in quotation marks (" or ').
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| A | Info: No img element found, no alt attribute checked
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| A | Good: 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
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| https://letsg5122.dd-dns.de/.well-known/acme-challenge/check-your-website-dot-server-daten-dot-de
| 5.470 seconds
| Warning: 404 needs more then one second
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| A | Duration: 397536 milliseconds, 397.536 seconds
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