1. General Results, most used to calculate the result A name "ftp.acc.umu.se" is subdomain, public suffix is ".se", top-level-domain is ".se", top-level-domain-type is "country-code", Country is Sweden, tld-manager is "The Internet Infrastructure Foundation", num .se-domains preloaded: 984 (complete: 231048) A Good: All ip addresses are public addresses A Good: Minimal 2 ip addresses per domain name found: ftp.acc.umu.se has 6 different ip addresses (authoritative). A Good: Ipv4 and Ipv6 addresses per domain name found: ftp.acc.umu.se has 3 ipv4, 3 ipv6 addresses A DNS: "Name Error" means: No www-dns-entry defined. This isn't a problem A https://ftp.acc.umu.se/ 194.71.11.173 https://mirror.accum.se/ Correct redirect https to https A https://ftp.acc.umu.se/ 2001:6b0:19::173 https://mirror.accum.se/ Correct redirect https to https A Good: 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. A Good: All urls with http status 200/404 have a complete Content-Type header (MediaType / MediaSubType + correct charset) B https://ftp.acc.umu.se/ 194.71.11.173 Missing HSTS-Header B https://ftp.acc.umu.se/ 2001:6b0:19::173 Missing HSTS-Header B https://mirror.accum.se/ Missing HSTS-Header B https://ftp.acc.umu.se/ 194.71.11.163 Missing HSTS-Header B https://ftp.acc.umu.se/ 194.71.11.165 Missing HSTS-Header B https://ftp.acc.umu.se/ 2001:6b0:19::163 Missing HSTS-Header B https://ftp.acc.umu.se/ 2001:6b0:19::165 Missing HSTS-Header 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. D http://ftp.acc.umu.se/ 194.71.11.173 http://mirror.accum.se/ Wrong redirect one domain http to other domain http. First redirect to https without changing the domain, so no new dns query is required. 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. D http://ftp.acc.umu.se/ 2001:6b0:19::173 http://mirror.accum.se/ Wrong redirect one domain http to other domain http. First redirect to https without changing the domain, so no new dns query is required. 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. 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. K http://ftp.acc.umu.se/ 194.71.11.163, Status 200 http://ftp.acc.umu.se/ 194.71.11.173, Status 301 Configuration problem - different ip addresses with different status K http://ftp.acc.umu.se/ 194.71.11.163, Status 200 http://ftp.acc.umu.se/ 2001:6b0:19::173, Status 301 Configuration problem - different ip addresses with different status K http://ftp.acc.umu.se/ 194.71.11.165, Status 200 http://ftp.acc.umu.se/ 194.71.11.173, Status 301 Configuration problem - different ip addresses with different status K http://ftp.acc.umu.se/ 194.71.11.173, Status 301 http://ftp.acc.umu.se/ 2001:6b0:19::163, Status 200 Configuration problem - different ip addresses with different status K http://ftp.acc.umu.se/ 194.71.11.173, Status 301 http://ftp.acc.umu.se/ 2001:6b0:19::165, Status 200 Configuration problem - different ip addresses with different status K http://ftp.acc.umu.se/ 194.71.11.165, Status 200 http://ftp.acc.umu.se/ 2001:6b0:19::173, Status 301 Configuration problem - different ip addresses with different status K http://ftp.acc.umu.se/ 2001:6b0:19::163, Status 200 http://ftp.acc.umu.se/ 2001:6b0:19::173, Status 301 Configuration problem - different ip addresses with different status K http://ftp.acc.umu.se/ 2001:6b0:19::165, Status 200 http://ftp.acc.umu.se/ 2001:6b0:19::173, Status 301 Configuration problem - different ip addresses with different status K https://ftp.acc.umu.se/ 194.71.11.163, Status 200 https://ftp.acc.umu.se/ 194.71.11.173, Status 301 Configuration problem - different ip addresses with different status K https://ftp.acc.umu.se/ 194.71.11.165, Status 200 https://ftp.acc.umu.se/ 194.71.11.173, Status 301 Configuration problem - different ip addresses with different status K https://ftp.acc.umu.se/ 194.71.11.173, Status 301 https://ftp.acc.umu.se/ 2001:6b0:19::163, Status 200 Configuration problem - different ip addresses with different status K https://ftp.acc.umu.se/ 194.71.11.173, Status 301 https://ftp.acc.umu.se/ 2001:6b0:19::165, Status 200 Configuration problem - different ip addresses with different status K https://ftp.acc.umu.se/ 194.71.11.165, Status 200 https://ftp.acc.umu.se/ 2001:6b0:19::173, Status 301 Configuration problem - different ip addresses with different status K https://ftp.acc.umu.se/ 194.71.11.163, Status 200 https://ftp.acc.umu.se/ 2001:6b0:19::173, Status 301 Configuration problem - different ip addresses with different status K https://ftp.acc.umu.se/ 2001:6b0:19::163, Status 200 https://ftp.acc.umu.se/ 2001:6b0:19::173, Status 301 Configuration problem - different ip addresses with different status K https://ftp.acc.umu.se/ 2001:6b0:19::165, Status 200 https://ftp.acc.umu.se/ 2001:6b0:19::173, Status 301 Configuration problem - different ip addresses with different status N https://194.71.11.163/ 194.71.11.163 Error - Certificate isn't trusted, RemoteCertificateNameMismatch N https://194.71.11.165/ 194.71.11.165 Error - Certificate isn't trusted, RemoteCertificateNameMismatch N https://194.71.11.173/ 194.71.11.173 Error - Certificate isn't trusted, RemoteCertificateNameMismatch N https://[2001:06b0:0019:0000:0000:0000:0000:0163]/ 2001:6b0:19::163 Error - Certificate isn't trusted, RemoteCertificateNameMismatch N https://[2001:06b0:0019:0000:0000:0000:0000:0165]/ 2001:6b0:19::165 Error - Certificate isn't trusted, RemoteCertificateNameMismatch N https://[2001:06b0:0019:0000:0000:0000:0000:0173]/ 2001:6b0:19::173 Error - Certificate isn't trusted, RemoteCertificateNameMismatch A Good: More then one ip address per domain name found, checking all ip addresses the same http status and the same certificate found: Domain ftp.acc.umu.se, 6 ip addresses. 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 ftp.acc.umu.se, 6 ip addresses, 1 different http results. 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.ftp.acc.umu.se 2. Header-Checks F ftp.acc.umu.se 194.71.11.163 Content-Security-Policy Critical: Missing Header: F ftp.acc.umu.se 194.71.11.163 X-Content-Type-Options Critical: Missing Header: F ftp.acc.umu.se 194.71.11.163 Referrer-Policy Critical: Missing Header: F ftp.acc.umu.se 194.71.11.163 Permissions-Policy Critical: Missing Header: F ftp.acc.umu.se 194.71.11.165 Content-Security-Policy Critical: Missing Header: F ftp.acc.umu.se 194.71.11.165 X-Content-Type-Options Critical: Missing Header: F ftp.acc.umu.se 194.71.11.165 Referrer-Policy Critical: Missing Header: F ftp.acc.umu.se 194.71.11.165 Permissions-Policy Critical: Missing Header: F ftp.acc.umu.se 2001:6b0:19::163 Content-Security-Policy Critical: Missing Header: F ftp.acc.umu.se 2001:6b0:19::163 X-Content-Type-Options Critical: Missing Header: F ftp.acc.umu.se 2001:6b0:19::163 Referrer-Policy Critical: Missing Header: F ftp.acc.umu.se 2001:6b0:19::163 Permissions-Policy Critical: Missing Header: F ftp.acc.umu.se 2001:6b0:19::165 Content-Security-Policy Critical: Missing Header: F ftp.acc.umu.se 2001:6b0:19::165 X-Content-Type-Options Critical: Missing Header: F ftp.acc.umu.se 2001:6b0:19::165 Referrer-Policy Critical: Missing Header: F ftp.acc.umu.se 2001:6b0:19::165 Permissions-Policy Critical: Missing Header: F mirror.accum.se Content-Security-Policy Critical: Missing Header: F mirror.accum.se X-Content-Type-Options Critical: Missing Header: F mirror.accum.se Referrer-Policy Critical: Missing Header: F mirror.accum.se Permissions-Policy Critical: Missing Header: 3. DNS- and NameServer - Checks A Info:: 8 Root-climbing DNS Queries required to find all IPv4- and IPv6-Addresses of 5 Name Servers. A Info:: 8 Queries complete, 6 with IPv6, 2 with IPv4. Warning: Only some DNS Queries done via ipv6. IPv6 is the future, so the name servers of your name servers should have ipv6 addresses. A Good: 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.dns.norrnod.se (194.165.224.190), dns.norrnod.se (194.165.224.190), ns1.umu.se (130.239.1.90, 2001:6b0:e:6::2), ns2.umu.se (130.239.4.100, 2001:6b0:e:7::2), sunic.sunet.se (192.36.125.2, 2001:6b0:7::2) A Good (1 - 3.0):: An average of 1.6 queries per domain name server required to find all ip addresses of all name servers. A Info:: 5 different Name Servers found: dns.norrnod.se, nixon.acc.umu.se, ns1.umu.se, ns2.umu.se, sunic.sunet.se, 5 Name Servers included in Delegation: dns.norrnod.se, nixon.acc.umu.se, ns1.umu.se, ns2.umu.se, sunic.sunet.se, 5 Name Servers included in 1 Zone definitions: dns.norrnod.se, nixon.acc.umu.se, ns1.umu.se, ns2.umu.se, sunic.sunet.se, 1 Name Servers listed in SOA.Primary: nixon.acc.umu.se. A Good: Only one SOA.Primary Name Server found.: nixon.acc.umu.se. A Good: SOA.Primary Name Server included in the delegation set.: nixon.acc.umu.se. 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: dns.norrnod.se, nixon.acc.umu.se, ns1.umu.se, ns2.umu.se, sunic.sunet.se A Good: All Name Server Domain Names have a Public Suffix. A Good: All Name Server Domain Names ending with a Public Suffix have minimal one IPv4- or IPv6 address. A Good: All Name Server ip addresses are public. A Good: Minimal 2 different name servers (public suffix and public ip address) found: 5 different Name Servers found A Good: Some Name Servers have IPv6 addresses: 4 Name Servers with IPv6 found (1 Name Servers without IPv6) 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.: 5 Name Servers, 1 Top Level Domain: se A Good: Name Servers with different domain names found.: 3 different Domains found Warning: All Name Servers from the same Country / IP location.: 5 Name Servers, 1 Countries: SE A Info: Ipv4-Subnet-list: 5 Name Servers, 3 different subnets (first Byte): 130., 192., 194., 3 different subnets (first two Bytes): 130.239., 192.36., 194.165., 5 different subnets (first three Bytes): 130.239.1., 130.239.18., 130.239.4., 192.36.125., 194.165.224. A Good: Name Server IPv4-addresses from different subnet found: A Info: IPv6-Subnet-list: 4 Name Servers with IPv6, 1 different subnets (first block): 2001:, 1 different subnets (first two blocks): 2001:06b0:, 2 different subnets (first three blocks): 2001:06b0:0007:, 2001:06b0:000e:, 4 different subnets (first four blocks): 2001:06b0:0007:0000:, 2001:06b0:000e:0006:, 2001:06b0:000e:0007:, 2001:06b0:000e:2018: A Good: Name Server IPv6 addresses from different subnets found. A Good: Nameserver supports TCP connections: 2 good Nameserver A Good: Nameserver supports Echo Capitalization: 2 good Nameserver A Good: Nameserver supports EDNS with max. 512 Byte Udp payload, message is smaller: 2 good Nameserver A Good: 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: catcher-in-the-rye.nic.se: OP100: no result. FLAGS: no result. V1: no result. V1OP100: no result. V1FLAGS: no result. DNSSEC: no result. V1DNSSEC: no result. NSID: no result. COOKIE: no result. CLIENTSUBNET: no result. Nameserver doesn't pass all EDNS-Checks: nixon.acc.umu.se: OP100: no result. FLAGS: no result. V1: no result. V1OP100: no result. V1FLAGS: no result. DNSSEC: no result. V1DNSSEC: no result. NSID: no result. COOKIE: no result. CLIENTSUBNET: no result. Nameserver doesn't pass all EDNS-Checks: ns.umu.se: 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. A Good: All SOA have the same Serial Number A Good: CAA entries found, creating certificate is limited: letsencrypt.org is allowed to create certificates A Good: CAA entries found, creating certificate is limited: sectigo.com is allowed to create certificates A Good: CAA entries found, creating certificate is limited: no CAA is allowed to create wildcard certificates 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. https://mirror.accum.se/ Warning: https result with status 200 and size greater then 1024 Bytes without GZip found. Add GZip support so the html content is compressed. https://ftp.acc.umu.se/ 194.71.11.163 Warning: https result with status 200 and size greater then 1024 Bytes without GZip found. Add GZip support so the html content is compressed. https://ftp.acc.umu.se/ 194.71.11.165 Warning: https result with status 200 and size greater then 1024 Bytes without GZip found. Add GZip support so the html content is compressed. https://ftp.acc.umu.se/ 2001:6b0:19::163 Warning: https result with status 200 and size greater then 1024 Bytes without GZip found. Add GZip support so the html content is compressed. https://ftp.acc.umu.se/ 2001:6b0:19::165 Warning: https result with status 200 and size greater then 1024 Bytes without GZip found. Add GZip support so the html content is compressed. https://194.71.11.163/ 194.71.11.163 Warning: https result with status 200 and size greater then 1024 Bytes without GZip found. Add GZip support so the html content is compressed. https://194.71.11.165/ 194.71.11.165 Warning: https result with status 200 and size greater then 1024 Bytes without GZip found. Add GZip support so the html content is compressed. https://194.71.11.173/ 194.71.11.173 Warning: https result with status 200 and size greater then 1024 Bytes without GZip found. Add GZip support so the html content is compressed. https://[2001:06b0:0019:0000:0000:0000:0000:0163]/ 2001:6b0:19::163 Warning: https result with status 200 and size greater then 1024 Bytes without GZip found. Add GZip support so the html content is compressed. https://[2001:06b0:0019:0000:0000:0000:0000:0165]/ 2001:6b0:19::165 Warning: https result with status 200 and size greater then 1024 Bytes without GZip found. Add GZip support so the html content is compressed. https://[2001:06b0:0019:0000:0000:0000:0000:0173]/ 2001:6b0:19::173 Warning: https result with status 200 and size greater then 1024 Bytes without GZip found. Add GZip support so the html content is compressed. https://mirror.accum.se/ 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. https://ftp.acc.umu.se/ 194.71.11.163 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. https://ftp.acc.umu.se/ 194.71.11.165 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. https://ftp.acc.umu.se/ 2001:6b0:19::163 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. https://ftp.acc.umu.se/ 2001:6b0:19::165 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. https://194.71.11.163/ 194.71.11.163 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. https://194.71.11.165/ 194.71.11.165 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. https://194.71.11.173/ 194.71.11.173 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. https://[2001:06b0:0019:0000:0000:0000:0000:0163]/ 2001:6b0:19::163 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. https://[2001:06b0:0019:0000:0000:0000:0000:0165]/ 2001:6b0:19::165 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. https://[2001:06b0:0019:0000:0000:0000:0000:0173]/ 2001:6b0:19::173 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. https://mirror.accum.se/ 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. https://ftp.acc.umu.se/ 194.71.11.163 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. https://ftp.acc.umu.se/ 194.71.11.165 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. https://ftp.acc.umu.se/ 2001:6b0:19::163 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. https://ftp.acc.umu.se/ 2001:6b0:19::165 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. https://194.71.11.163/ 194.71.11.163 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. https://194.71.11.165/ 194.71.11.165 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. https://194.71.11.173/ 194.71.11.173 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. https://[2001:06b0:0019:0000:0000:0000:0000:0163]/ 2001:6b0:19::163 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. https://[2001:06b0:0019:0000:0000:0000:0000:0165]/ 2001:6b0:19::165 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. https://[2001:06b0:0019:0000:0000:0000:0000:0173]/ 2001:6b0:19::173 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. https://mirror.accum.se/ Warning: Https connections (Standard Port 443) found without support of the http/2 protocol via ALPN. Http/2 is the new Http-Version (old: http 1.1) with some important new features. Update your server software so http/2 is available. Only one TCP-connection per Server (that's a performance boost), Header-Compression and Server Pushs are available. Domain Sharding and Inline-CSS/Javascript shouldn't used with http/2. https://ftp.acc.umu.se/ 194.71.11.163 Warning: Https connections (Standard Port 443) found without support of the http/2 protocol via ALPN. Http/2 is the new Http-Version (old: http 1.1) with some important new features. Update your server software so http/2 is available. Only one TCP-connection per Server (that's a performance boost), Header-Compression and Server Pushs are available. Domain Sharding and Inline-CSS/Javascript shouldn't used with http/2. https://ftp.acc.umu.se/ 194.71.11.165 Warning: Https connections (Standard Port 443) found without support of the http/2 protocol via ALPN. Http/2 is the new Http-Version (old: http 1.1) with some important new features. Update your server software so http/2 is available. Only one TCP-connection per Server (that's a performance boost), Header-Compression and Server Pushs are available. Domain Sharding and Inline-CSS/Javascript shouldn't used with http/2. https://ftp.acc.umu.se/ 2001:6b0:19::163 Warning: Https connections (Standard Port 443) found without support of the http/2 protocol via ALPN. Http/2 is the new Http-Version (old: http 1.1) with some important new features. Update your server software so http/2 is available. Only one TCP-connection per Server (that's a performance boost), Header-Compression and Server Pushs are available. Domain Sharding and Inline-CSS/Javascript shouldn't used with http/2. https://ftp.acc.umu.se/ 2001:6b0:19::165 Warning: Https connections (Standard Port 443) found without support of the http/2 protocol via ALPN. Http/2 is the new Http-Version (old: http 1.1) with some important new features. Update your server software so http/2 is available. Only one TCP-connection per Server (that's a performance boost), Header-Compression and Server Pushs are available. Domain Sharding and Inline-CSS/Javascript shouldn't used with http/2. https://194.71.11.163/ 194.71.11.163 Warning: Https connections (Standard Port 443) found without support of the http/2 protocol via ALPN. Http/2 is the new Http-Version (old: http 1.1) with some important new features. Update your server software so http/2 is available. Only one TCP-connection per Server (that's a performance boost), Header-Compression and Server Pushs are available. Domain Sharding and Inline-CSS/Javascript shouldn't used with http/2. https://194.71.11.165/ 194.71.11.165 Warning: Https connections (Standard Port 443) found without support of the http/2 protocol via ALPN. Http/2 is the new Http-Version (old: http 1.1) with some important new features. Update your server software so http/2 is available. Only one TCP-connection per Server (that's a performance boost), Header-Compression and Server Pushs are available. Domain Sharding and Inline-CSS/Javascript shouldn't used with http/2. https://194.71.11.173/ 194.71.11.173 Warning: Https connections (Standard Port 443) found without support of the http/2 protocol via ALPN. Http/2 is the new Http-Version (old: http 1.1) with some important new features. Update your server software so http/2 is available. Only one TCP-connection per Server (that's a performance boost), Header-Compression and Server Pushs are available. Domain Sharding and Inline-CSS/Javascript shouldn't used with http/2. https://[2001:06b0:0019:0000:0000:0000:0000:0163]/ 2001:6b0:19::163 Warning: Https connections (Standard Port 443) found without support of the http/2 protocol via ALPN. Http/2 is the new Http-Version (old: http 1.1) with some important new features. Update your server software so http/2 is available. Only one TCP-connection per Server (that's a performance boost), Header-Compression and Server Pushs are available. Domain Sharding and Inline-CSS/Javascript shouldn't used with http/2. https://[2001:06b0:0019:0000:0000:0000:0000:0165]/ 2001:6b0:19::165 Warning: Https connections (Standard Port 443) found without support of the http/2 protocol via ALPN. Http/2 is the new Http-Version (old: http 1.1) with some important new features. Update your server software so http/2 is available. Only one TCP-connection per Server (that's a performance boost), Header-Compression and Server Pushs are available. Domain Sharding and Inline-CSS/Javascript shouldn't used with http/2. https://[2001:06b0:0019:0000:0000:0000:0000:0173]/ 2001:6b0:19::173 Warning: Https connections (Standard Port 443) found without support of the http/2 protocol via ALPN. Http/2 is the new Http-Version (old: http 1.1) with some important new features. Update your server software so http/2 is available. Only one TCP-connection per Server (that's a performance boost), Header-Compression and Server Pushs are available. Domain Sharding and Inline-CSS/Javascript shouldn't used with http/2. Warning: CSS / JavaScript found without GZip support. Send these ressources with GZip. 5 external CSS / JavaScript files without GZip found - 0 with GZip, 5 complete A Good: All images with internal compression not sent via GZip. Images (.png, .jpg) are already compressed, so an additional GZip isn't helpful. 65 images (type image/png, image/jpg) found without additional GZip. Not required because these images are already compressed Warning: CSS / JavaScript files with a missing or too short Cache-Control header found. Browsers should cache and re-use these files. 11 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, 11 complete. Warning: Images with a missing or too short Cache-Control header found. Browsers should cache and re-use these files. 154 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, 154 complete. A Good: All checked attribute values are enclosed in quotation marks (" or '). A Good: All img-elements have a valid alt-attribute.: 154 img-elements found. 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 A Duration: 584433 milliseconds, 584.433 seconds