| 1. General Results, most used to calculate the result |
| A | name "sfeermaeckers.nl" is domain, public suffix is ".nl", top-level-domain is ".nl", top-level-domain-type is "country-code", Country is Netherlands (the), tld-manager is "SIDN (Stichting Internet Domeinregistratie Nederland)", num .nl-domains preloaded: 4933 (complete: 231048)
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| A | Good: All ip addresses are public addresses
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| Warning: Only one ip address found: sfeermaeckers.nl has only one ip address.
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| Warning: Only one ip address found: www.sfeermaeckers.nl 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: sfeermaeckers.nl 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.sfeermaeckers.nl has no ipv6 address.
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| A | Good: No asked Authoritative Name Server had a timeout
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| A | Good: one preferred version: non-www is preferred
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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):3 complete Content-Type - header (5 urls)
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| http://sfeermaeckers.nl/.well-known/acme-challenge/check-your-website-dot-server-daten-dot-de 199.247.29.214
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| Url with incomplete Content-Type - header - missing charset
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| https://23.227.38.74/ 23.227.38.74
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| Url with incomplete Content-Type - header - missing charset
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| B | Warning: HSTS max-age is too short - minimum 31536000 = 365 days required, 7889238 seconds = 91 days found
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| B | https://sfeermaeckers.nl/ 199.247.29.214
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| Missing HSTS-Header
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| E | http://www.sfeermaeckers.nl/ 23.227.38.74
| https://sfeermaeckers.nl/
| Wrong redirect one domain http to other domain https. First redirect to https without new dns query, so the server can send the HSTS header. That's fundamental using HSTS (Http Strict Transport Security). First step: Add correct redirects http ⇒ https. 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. Then recheck your domain, should be Grade C. There is the rule to select one https version as preferred version.
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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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| I | https://sfeermaeckers.nl/ 199.247.29.214
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| Content problems or problems with resources included - http links, files doesn't exist, different Content-Type definitions. Check the Html-Content - Part.
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| M | https://23.227.38.74/ 23.227.38.74
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| Misconfiguration - main pages should never send http status 400 - 499
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| N | https://sfeermaeckers.nl/ 199.247.29.214
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| Error - Certificate isn't trusted, RemoteCertificateNameMismatch, RemoteCertificateChainErrors
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| N | https://199.247.29.214/ 199.247.29.214
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| Error - Certificate isn't trusted, RemoteCertificateNameMismatch, RemoteCertificateChainErrors
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| N | https://23.227.38.74/ 23.227.38.74
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| Error - Certificate isn't trusted, RemoteCertificateNameMismatch
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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 sfeermaeckers.nl, 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 different. So that domain requires Server Name Indication (SNI), so the server is able to select the correct certificate.: Domain www.sfeermaeckers.nl, 1 ip addresses.
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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.sfeermaeckers.nl
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| 2. Header-Checks (Cross-Origin-* headers are alpha - started 2024-06-05) |
| F | sfeermaeckers.nl 199.247.29.214
| Content-Security-Policy
| Critical: Missing Header:
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| F | sfeermaeckers.nl 199.247.29.214
| X-Content-Type-Options
| Critical: Missing Header:
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| F | sfeermaeckers.nl 199.247.29.214
| Referrer-Policy
| Critical: Missing Header:
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| F | sfeermaeckers.nl 199.247.29.214
| Permissions-Policy
| Critical: Missing Header:
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| 3. DNS- and NameServer - Checks |
| A | Info:: 7 Root-climbing DNS Queries required to find all IPv4- and IPv6-Addresses of 2 Name Servers.
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| A | Info:: 7 Queries complete, 7 with IPv6, 0 with IPv4.
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| A | Good: All DNS Queries done via IPv6.
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| Ok (4 - 8):: An average of 3.5 queries per domain name server required to find all ip addresses of all name servers.
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| A | Info:: 2 different Name Servers found: gwen.ns.cloudflare.com, owen.ns.cloudflare.com, 2 Name Servers included in Delegation: gwen.ns.cloudflare.com, owen.ns.cloudflare.com, 2 Name Servers included in 1 Zone definitions: gwen.ns.cloudflare.com, owen.ns.cloudflare.com, 1 Name Servers listed in SOA.Primary: gwen.ns.cloudflare.com.
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| A | Good: Only one SOA.Primary Name Server found.: gwen.ns.cloudflare.com.
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| A | Good: SOA.Primary Name Server included in the delegation set.: gwen.ns.cloudflare.com.
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| A | Good: 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: gwen.ns.cloudflare.com, owen.ns.cloudflare.com
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| A | Good: All Name Server Domain Names have a Public Suffix.
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| A | Good: All Name Server Domain Names ending with a Public Suffix have minimal one IPv4- or IPv6 address.
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| A | Good: All Name Server ip addresses are public.
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| A | Good: Minimal 2 different name servers (public suffix and public ip address) found: 2 different Name Servers found
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| 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: com
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| 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: cloudflare.com
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| A | Good: Name servers with different Country locations found: 2 Name Servers, 3 Countries: CA, CR, GB
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| A | Info: Ipv4-Subnet-list: 6 Name Servers, 3 different subnets (first Byte): 108., 172., 173., 3 different subnets (first two Bytes): 108.162., 172.64., 173.245., 6 different subnets (first three Bytes): 108.162.192., 108.162.193., 172.64.32., 172.64.33., 173.245.58., 173.245.59.
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| A | Good: Name Server IPv4-addresses from different subnet found:
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| A | Info: IPv6-Subnet-list: 6 Name Servers with IPv6, 3 different subnets (first block): 2606:, 2803:, 2a06:, 3 different subnets (first two blocks): 2606:4700:, 2803:f800:, 2a06:98c1:, 4 different subnets (first three blocks): 2606:4700:0050:, 2606:4700:0058:, 2803:f800:0050:, 2a06:98c1:0050:, 4 different subnets (first four blocks): 2606:4700:0050:0000:, 2606:4700:0058:0000:, 2803:f800:0050:0000:, 2a06:98c1:0050:0000:
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| A | Good: Name Server IPv6 addresses from different subnets found.
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| A | Good: Nameserver supports TCP connections: 12 good Nameserver
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| A | Good: Nameserver supports Echo Capitalization: 12 good Nameserver
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| A | Good: Nameserver supports EDNS with max. 512 Byte Udp payload, message is smaller: 12 good Nameserver
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| A | Good: Nameserver has passed 10 EDNS-Checks (OP100, FLAGS, V1, V1OP100, V1FLAGS, DNSSEC, V1DNSSEC, NSID, COOKIE, CLIENTSUBNET): 12 good Nameserver
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| Nameserver doesn't pass all EDNS-Checks: ns4.dnsimple.com / 199.247.155.53: OP100: SOA expected and found, NOERR expectend and NOERR found, Version 0 expectend and found, NO OPT100 expected, OPT100 echoed. FLAGS: ok. V1: SOA NOT expected, but found, BADVER expected, NOERR found, Version 0 expected, Version greater 0 found. V1OP100: SOA NOT expected, but found, BADVER expected, NOERR found, Version 0 expected, Version greater 0 found, NO OPT100 expected, OPT100 echoed. V1FLAGS: SOA NOT expected, but found, BADVER expected, NOERR found, Version 0 expected, Version greater 0 found. DNSSEC: ok. V1DNSSEC: SOA NOT expected, but found, BADVER expected, NOERR found, Version 0 expected, Version greater 0 found. NSID: ok. COOKIE: ok. CLIENTSUBNET: ok.
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| Nameserver doesn't pass all EDNS-Checks: ns4.dnsimple.com / 2620:111:8007::53: OP100: SOA expected and found, NOERR expectend and NOERR found, Version 0 expectend and found, NO OPT100 expected, OPT100 echoed. FLAGS: ok. V1: SOA NOT expected, but found, BADVER expected, NOERR found, Version 0 expected, Version greater 0 found. V1OP100: SOA NOT expected, but found, BADVER expected, NOERR found, Version 0 expected, Version greater 0 found, NO OPT100 expected, OPT100 echoed. V1FLAGS: SOA NOT expected, but found, BADVER expected, NOERR found, Version 0 expected, Version greater 0 found. DNSSEC: ok. V1DNSSEC: SOA NOT expected, but found, BADVER expected, NOERR found, Version 0 expected, Version greater 0 found. NSID: ok. COOKIE: ok. CLIENTSUBNET: ok.
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| A | Good: All SOA have the same Serial Number
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| A | Good: CAA entries found, creating certificate is limited: digicert.com is allowed to create certificates
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| A | Good: CAA entries found, creating certificate is limited: globalsign.com is allowed to create certificates
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| A | Good: CAA entries found, creating certificate is limited: letsencrypt.org is allowed to create certificates
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| 4. Content- and Performance-critical Checks |
| http://www.sfeermaeckers.nl/.well-known/acme-challenge/check-your-website-dot-server-daten-dot-de 23.227.38.74
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| Fatal: Check of /.well-known/acme-challenge/random-filename has a http status between 400 and 499, but not 404 - Not Found. Creating a Letsencrypt certificate via http-01 challenge may not work. Trouble creating a certificate? Use https://community.letsencrypt.org/ to ask.
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| A | Good: Every https result with status 200 and greater 1024 Bytes is compressed (gzip, deflate, br checked).
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| https://sfeermaeckers.nl/ 199.247.29.214
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| Warning: Https + http status 200 + Inline CSS / JavaScript found. Don't use inline CSS / JavaScript. These are compiled and re-used ressources, save these with a long Cache-Control max-age - header.
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| https://199.247.29.214/ 199.247.29.214
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| Warning: Https + http status 200 + Inline CSS / JavaScript found. Don't use inline CSS / JavaScript. These are compiled and re-used ressources, save these with a long Cache-Control max-age - header.
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| https://sfeermaeckers.nl/ 199.247.29.214
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| Warning: Https result with status 200 found, Html-Content is too big. Should be max. 110 %. May contain inline CSS / JavaScript, too much comments or white space. Re-used ressources - create files with a long Cache-Control max-age header. Remove comments and white space.
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| https://199.247.29.214/ 199.247.29.214
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| Warning: Https result with status 200 found, Html-Content is too big. Should be max. 110 %. May contain inline CSS / JavaScript, too much comments or white space. Re-used ressources - create files with a long Cache-Control max-age header. Remove comments and white space.
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| A | Good: Every https connection via port 443 supports the http/2 protocol via ALPN.
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| https://sfeermaeckers.nl/ 199.247.29.214
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| Critical: Some script Elements (type text/javascript) with a src-Attribute don't have a defer / async - Attribute. Loading and executing these JavaScripts blocks parsing and rendering the Html-Output. That's bad if your site is large or the connection is slow / mobile usage. Use "async" if the js file has only functions (so nothing is executed after parsing the file) or is independend. Use "defer" if the order of the scripts is important. All "defer" scripts are executed before the DOMContentLoaded event is fired. Check https://developer.mozilla.org/en-US/docs/Web/HTML/Element/script to see some details.: 2 script elements without defer/async.
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| https://199.247.29.214/ 199.247.29.214
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| Critical: Some script Elements (type text/javascript) with a src-Attribute don't have a defer / async - Attribute. Loading and executing these JavaScripts blocks parsing and rendering the Html-Output. That's bad if your site is large or the connection is slow / mobile usage. Use "async" if the js file has only functions (so nothing is executed after parsing the file) or is independend. Use "defer" if the order of the scripts is important. All "defer" scripts are executed before the DOMContentLoaded event is fired. Check https://developer.mozilla.org/en-US/docs/Web/HTML/Element/script to see some details.: 2 script elements without defer/async.
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| Warning: CSS / JavaScript files with a missing or too short Cache-Control header found. Browsers should cache and re-use these files. 10 external CSS / JavaScript files without Cache-Control-Header, 0 with Cache-Control, but no max-age, 0 with Cache-Control max-age too short (minimum 7 days), 0 with Cache-Control long enough, 10 complete.
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| Warning: Images with a missing or too short Cache-Control header found. Browsers should cache and re-use these files. 18 image files without Cache-Control-Header, 0 with Cache-Control, but no max-age, 0 with Cache-Control max-age too short (minimum 7 days), 0 with Cache-Control long enough, 18 complete.
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| A | Good: All checked attribute values are enclosed in quotation marks (" or ').
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| A | Good: All img-elements have a valid alt-attribute.: 4 img-elements found.
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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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| A | Info: Different Server-Headers found
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| A | Duration: 151666 milliseconds, 151.666 seconds
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