1. General Results, most used to calculate the result A name "simplamo.tech" is domain, public suffix is ".tech", top-level-domain is ".tech", top-level-domain-type is "generic", tld-manager is "Dot Tech LLC", num .tech-domains preloaded: 373 (complete: 175327) A Good: All ip addresses are public addresses A Good: Minimal 2 ip addresses per domain name found: www.simplamo.tech has 4 different ip addresses (authoritative). A Good: Ipv4 and Ipv6 addresses per domain name found: www.simplamo.tech has 2 ipv4, 2 ipv6 addresses A Good: No asked Authoritative Name Server had a timeout A Good - only one version with Http-Status 200 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) D http://www.simplamo.tech/ 104.21.80.188 http://www.simplamo.tech/login 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://www.simplamo.tech/ 172.67.153.33 http://www.simplamo.tech/login 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://www.simplamo.tech/ 2606:4700:3030::ac43:9921 http://www.simplamo.tech/login 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://www.simplamo.tech/ 2606:4700:3032::6815:50bc http://www.simplamo.tech/login 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://www.simplamo.tech/.well-known/acme-challenge/check-your-website-dot-server-daten-dot-de 104.21.80.188 http://www.simplamo.tech/login 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://www.simplamo.tech/.well-known/acme-challenge/check-your-website-dot-server-daten-dot-de 172.67.153.33 http://www.simplamo.tech/login 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://www.simplamo.tech/.well-known/acme-challenge/check-your-website-dot-server-daten-dot-de 2606:4700:3030::ac43:9921 http://www.simplamo.tech/login 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://www.simplamo.tech/.well-known/acme-challenge/check-your-website-dot-server-daten-dot-de 2606:4700:3032::6815:50bc http://www.simplamo.tech/login 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: No https - result with http-status 200, no encryption 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. P https://www.simplamo.tech/ 104.21.80.188 Error creating a TLS-Connection: IANA TLS Alert No. 40, handshake_failure. Receipt of a "handshake_failure" alert message indicates that the sender was unable to negotiate an acceptable set of security parameters given the options available. SSL_ERROR_NO_CYPHER_OVERLAP (Mozilla) / ERR_SSL_VERSION_OR_CIPHER_MISMATCH (Chrome) P https://www.simplamo.tech/ 172.67.153.33 Error creating a TLS-Connection: IANA TLS Alert No. 40, handshake_failure. Receipt of a "handshake_failure" alert message indicates that the sender was unable to negotiate an acceptable set of security parameters given the options available. SSL_ERROR_NO_CYPHER_OVERLAP (Mozilla) / ERR_SSL_VERSION_OR_CIPHER_MISMATCH (Chrome) P https://www.simplamo.tech/ 2606:4700:3030::ac43:9921 Error creating a TLS-Connection: IANA TLS Alert No. 40, handshake_failure. Receipt of a "handshake_failure" alert message indicates that the sender was unable to negotiate an acceptable set of security parameters given the options available. SSL_ERROR_NO_CYPHER_OVERLAP (Mozilla) / ERR_SSL_VERSION_OR_CIPHER_MISMATCH (Chrome) P https://www.simplamo.tech/ 2606:4700:3032::6815:50bc Error creating a TLS-Connection: IANA TLS Alert No. 40, handshake_failure. Receipt of a "handshake_failure" alert message indicates that the sender was unable to negotiate an acceptable set of security parameters given the options available. SSL_ERROR_NO_CYPHER_OVERLAP (Mozilla) / ERR_SSL_VERSION_OR_CIPHER_MISMATCH (Chrome) P https://104.21.80.188/ 104.21.80.188 Error creating a TLS-Connection: IANA TLS Alert No. 40, handshake_failure. Receipt of a "handshake_failure" alert message indicates that the sender was unable to negotiate an acceptable set of security parameters given the options available. SSL_ERROR_NO_CYPHER_OVERLAP (Mozilla) / ERR_SSL_VERSION_OR_CIPHER_MISMATCH (Chrome) P https://172.67.153.33/ 172.67.153.33 Error creating a TLS-Connection: IANA TLS Alert No. 40, handshake_failure. Receipt of a "handshake_failure" alert message indicates that the sender was unable to negotiate an acceptable set of security parameters given the options available. SSL_ERROR_NO_CYPHER_OVERLAP (Mozilla) / ERR_SSL_VERSION_OR_CIPHER_MISMATCH (Chrome) P https://[2606:4700:3030:0000:0000:0000:ac43:9921]/ 2606:4700:3030::ac43:9921 Error creating a TLS-Connection: IANA TLS Alert No. 40, handshake_failure. Receipt of a "handshake_failure" alert message indicates that the sender was unable to negotiate an acceptable set of security parameters given the options available. SSL_ERROR_NO_CYPHER_OVERLAP (Mozilla) / ERR_SSL_VERSION_OR_CIPHER_MISMATCH (Chrome) P https://[2606:4700:3032:0000:0000:0000:6815:50bc]/ 2606:4700:3032::6815:50bc Error creating a TLS-Connection: IANA TLS Alert No. 40, handshake_failure. Receipt of a "handshake_failure" alert message indicates that the sender was unable to negotiate an acceptable set of security parameters given the options available. SSL_ERROR_NO_CYPHER_OVERLAP (Mozilla) / ERR_SSL_VERSION_OR_CIPHER_MISMATCH (Chrome) 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 www.simplamo.tech, 4 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.simplamo.tech, 4 ip addresses. 2. Header-Checks (alpha, started 2022-10-23, may be buggy / incomplete) 3. DNS- and NameServer - Checks A Info:: 7 Root-climbing DNS Queries required to find all IPv4- and IPv6-Addresses of 2 Name Servers. A Info:: 7 Queries complete, 7 with IPv6, 0 with IPv4. A Good: All DNS Queries done via IPv6. Ok (4 - 8):: An average of 3.5 queries per domain name server required to find all ip addresses of all name servers. A Info:: 2 different Name Servers found: aria.ns.cloudflare.com, clyde.ns.cloudflare.com, 2 Name Servers included in Delegation: aria.ns.cloudflare.com, clyde.ns.cloudflare.com, 2 Name Servers included in 1 Zone definitions: aria.ns.cloudflare.com, clyde.ns.cloudflare.com, 1 Name Servers listed in SOA.Primary: aria.ns.cloudflare.com. A Good: Only one SOA.Primary Name Server found.: aria.ns.cloudflare.com. A Good: SOA.Primary Name Server included in the delegation set.: aria.ns.cloudflare.com. 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: aria.ns.cloudflare.com, clyde.ns.cloudflare.com 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: 2 different Name Servers found 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 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 A Good: Name servers with different Country locations found: 2 Name Servers, 3 Countries: CR, GB, US A 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: A Good: Name Server IPv6 addresses from different subnets found. A Good: Nameserver supports TCP connections: 6 good Nameserver A Good: Nameserver supports Echo Capitalization: 6 good Nameserver A Good: Nameserver supports EDNS with max. 512 Byte Udp payload, message is smaller: 6 good Nameserver A Good: Nameserver has passed 10 EDNS-Checks (OP100, FLAGS, V1, V1OP100, V1FLAGS, DNSSEC, V1DNSSEC, NSID, COOKIE, CLIENTSUBNET): 6 good Nameserver Nameserver doesn't pass all EDNS-Checks: ns0.centralnic.net: 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 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 Fatal: All checks of /.well-known/acme-challenge/random-filename have a redirect, destination doesn't have the random filename. Creating a Letsencrypt certificate via http-01 challenge may not work. Trouble creating a certificate? Use https://community.letsencrypt.org/ to ask. A Info: No img element found, no alt attribute checked 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: 171173 milliseconds, 171.173 seconds