| 1. General Results, most used to calculate the result |
A | name "mail.lowensann.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: 1137 (complete: 263653)
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A | Good: All ip addresses are public addresses
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| Warning: Only one ip address found: mail.lowensann.se 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: mail.lowensann.se has no ipv6 address.
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A | Good: No asked Authoritative Name Server had a timeout
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A | DNS: "Name Error" means: No www-dns-entry defined. This isn't a problem
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A | Good: destination is https
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A | Good - only one version with Http-Status 200
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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):0 complete Content-Type - header (2 urls)
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| https://mail.lowensann.se/ 77.240.73.15
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| Url with incomplete Content-Type - header - missing charset
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| https://mail.lowensann.se/.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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A | http://mail.lowensann.se/ 77.240.73.15
| https://mail.lowensann.se/
| Correct redirect http - https with the same domain name
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B | https://mail.lowensann.se/ 77.240.73.15
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| Missing HSTS-Header
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B | https://mail.lowensann.se/.well-known/acme-challenge/check-your-website-dot-server-daten-dot-de
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| Missing HSTS-Header
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| 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 mail.lowensann.se, 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.mail.lowensann.se
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| 2. Header-Checks |
A | mail.lowensann.se 77.240.73.15
| Content-Security-Policy
| Ok: Header without syntax errors found: default-src https: data: 'unsafe-inline' 'unsafe-eval'
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F |
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| Bad: default-src with "*" or a scheme found. That allows too much, don't use such a definition.
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F |
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| Bad: default-src with 'unsafe-inline' or 'unsave-eval'. That's dangerous, don't use it.
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E |
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| Bad: No form-action directive found. Use one to limit the form - action - destinations. form-action is a navigation-directive, so default-src isn't used.
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E |
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| Bad: No frame-ancestors directive found. Use one to limit the pages allowed to use this page in frame / iframe / object / embed / applet. frame-ancestors is a navigation-directive, so default-src isn't used.
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E |
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| Bad: No base-uri directive found. Use one to limit the URLs which can be used in a document's <base> element. Because it's a document directive, default-src isn't used, so an own directive is required.
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E |
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| Critical: No object-src defined, the default-src used as fallback allows too much. object / embed / applet shouldn't be able to load these resources.
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E |
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| Critical: No script-src defined, the default-src used as fallback allows too much. script-src should always restricted.
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F |
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| Dangerous: No script-src defined, but the default-src as fallback allows the data: schema. That allows hidden code injection. Insert <script src='data:application/javascript;base64,YWxlcnQoJ1hTUycpOw=='></script> in your page and see what happens.
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F |
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| Dangerous: No frame-src defined, but the default-src used as fallback allows the data: schema. That allows hidden code injection. Insert <iframe src="data:text/html;charset=utf-8;base64,PCFET0NUWVBFIGh0bWw+PGh0bWw+PGJvZHk+PHA+YmVmb3JlPHNjcmlwdCB0eXBlPSJ0ZXh0L2phdmFzY3JpcHQiPmFsZXJ0KCdYU1MnKTwvc2NyaXB0PjxwPmFmdGVyPC9ib2R5PjwvaHRtbD4="></iframe> in your page and see what happens.
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A |
| X-Content-Type-Options
| Ok: Header without syntax errors found: nosniff
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A |
| Referrer-Policy
| Ok: Header without syntax errors found: strict-origin
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A |
| X-Frame-Options
| Ok: Header without syntax errors found: sameorigin
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B |
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| Info: Header is deprecated. May not longer work in modern browsers. sameorigin. Better solution: Use a Content-Security-Policy Header with a frame-ancestors directive. DENY - use 'none', SAMEORIGIN - use 'self'. If you want to allow some domains to frame your page, add these urls.
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A |
| X-Xss-Protection
| Ok: Header without syntax errors found: 1; mode=block
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B |
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| Info: Header is deprecated. May not longer work in modern browsers. 1; mode=block
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F | mail.lowensann.se 77.240.73.15
| Permissions-Policy
| Critical: Missing Header:
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B | mail.lowensann.se 77.240.73.15
| Cross-Origin-Embedder-Policy
| Info: Missing Header
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B | mail.lowensann.se 77.240.73.15
| Cross-Origin-Opener-Policy
| Info: Missing Header
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B | mail.lowensann.se 77.240.73.15
| Cross-Origin-Resource-Policy
| Info: 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: eugene.ns.cloudflare.com, galilea.ns.cloudflare.com, 2 Name Servers included in Delegation: eugene.ns.cloudflare.com, galilea.ns.cloudflare.com, 2 Name Servers included in 1 Zone definitions: eugene.ns.cloudflare.com, galilea.ns.cloudflare.com, 1 Name Servers listed in SOA.Primary: eugene.ns.cloudflare.com.
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A | Good: Only one SOA.Primary Name Server found.: eugene.ns.cloudflare.com.
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A | Good: SOA.Primary Name Server included in the delegation set.: eugene.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 | Info: Ipv4-Subnet-list: 6 Name Servers, 3 different subnets (first Byte): 108., 162., 172., 3 different subnets (first two Bytes): 108.162., 162.159., 172.64., 6 different subnets (first three Bytes): 108.162.194., 108.162.195., 162.159.38., 162.159.44., 172.64.34., 172.64.35.
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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: 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.
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| Nameserver doesn't pass all EDNS-Checks: eugene.ns.cloudflare.com: 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: z.ns.se: OP100: ok. FLAGS: ok. V1: ok. V1OP100: ok. V1FLAGS: ok. DNSSEC: ok. V1DNSSEC: ok. NSID: SOA expected, but NOT found, NOERR expectend and NOERR found, Version 0 expectend and found (FRA1). 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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| https://mail.lowensann.se/ 77.240.73.15
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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://mail.lowensann.se/ 77.240.73.15
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| 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.
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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://mail.lowensann.se/.well-known/acme-challenge/check-your-website-dot-server-daten-dot-de
| 2.686 seconds
| Warning: 404 needs more then one second
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A | Duration: 405923 milliseconds, 405.923 seconds
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