1. General Results, most used to calculate the result A name "xanthippe.asuscomm.com" is subdomain, public suffix is ".com", top-level-domain is ".com", top-level-domain-type is "generic", tld-manager is "VeriSign Global Registry Services", num .com-domains preloaded: 63591 (complete: 175327) A Good: All ip addresses are public addresses Warning: Only one ip address found: xanthippe.asuscomm.com has only one ip address. 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: xanthippe.asuscomm.com has no ipv6 address. 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: Some urls with http status 200/404 have a complete Content-Type header (MediaType / MediaSubType + correct charset):0 complete Content-Type - header (2 urls) https://xanthippe.asuscomm.com/ 24.251.176.181 Url with incomplete Content-Type - header - missing charset https://24.251.176.181/ 24.251.176.181 Url with incomplete Content-Type - header - missing charset B https://xanthippe.asuscomm.com/ 24.251.176.181 Missing HSTS-Header C Error - no version with Http-Status 200 H Fatal error: No https - result with http-status 200, no encryption I https://xanthippe.asuscomm.com/ 24.251.176.181 Content problems or problems with resources included - http links, files doesn't exist, different Content-Type definitions. Check the Html-Content - Part. M https://xanthippe.asuscomm.com/ 24.251.176.181 Misconfiguration - main pages should never send http status 400 - 499 M https://24.251.176.181/ 24.251.176.181 Misconfiguration - main pages should never send http status 400 - 499 N https://24.251.176.181/ 24.251.176.181 Error - Certificate isn't trusted, RemoteCertificateNameMismatch N 24.251.176.181:8443 Error - Certificate isn't trusted, RemoteCertificateNameMismatch X Fatal error: Nameserver doesn't support TCP connection: ns1.asuscomm.com / 2408:8206:78a1:5eb1:f159:d3a1:ce29:58a9: Timeout 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 xanthippe.asuscomm.com, 1 ip addresses, 1 different http results. 2. Header-Checks (alpha, started 2022-10-23, may be buggy / incomplete) 3. DNS- and NameServer - Checks A A A Info:: 13 different Name Servers found: a.gtld-servers.net, b.gtld-servers.net, c.gtld-servers.net, d.gtld-servers.net, e.gtld-servers.net, f.gtld-servers.net, g.gtld-servers.net, h.gtld-servers.net, i.gtld-servers.net, j.gtld-servers.net, k.gtld-servers.net, l.gtld-servers.net, m.gtld-servers.net, 13 Name Servers included in Delegation: a.gtld-servers.net, b.gtld-servers.net, c.gtld-servers.net, d.gtld-servers.net, e.gtld-servers.net, f.gtld-servers.net, g.gtld-servers.net, h.gtld-servers.net, i.gtld-servers.net, j.gtld-servers.net, k.gtld-servers.net, l.gtld-servers.net, m.gtld-servers.net, 13 Name Servers included in 1 Zone definitions: a.gtld-servers.net, b.gtld-servers.net, c.gtld-servers.net, d.gtld-servers.net, e.gtld-servers.net, f.gtld-servers.net, g.gtld-servers.net, h.gtld-servers.net, i.gtld-servers.net, j.gtld-servers.net, k.gtld-servers.net, l.gtld-servers.net, m.gtld-servers.net, 1 Name Servers listed in SOA.Primary: a.gtld-servers.net. A Good: Only one SOA.Primary Name Server found.: a.gtld-servers.net. A Good: SOA.Primary Name Server included in the delegation set.: a.gtld-servers.net. A Good: All Name Server Domain Names have a Public Suffix. A X Nameserver Timeout checking Echo Capitalization: ns1.asuscomm.com / 2408:8206:78a1:5eb1:f159:d3a1:ce29:58a9 X Nameserver Timeout checking EDNS512: ns1.asuscomm.com / 2408:8206:78a1:5eb1:f159:d3a1:ce29:58a9 Nameserver doesn't pass all EDNS-Checks: ns1.asuscomm.com / 2408:8206:78a1:5eb1:f159:d3a1:ce29:58a9: OP100: fatal timeout. FLAGS: fatal timeout. V1: fatal timeout. V1OP100: fatal timeout. V1FLAGS: fatal timeout. DNSSEC: fatal timeout. V1DNSSEC: fatal timeout. NSID: fatal timeout. COOKIE: fatal timeout. CLIENTSUBNET: fatal timeout. Nameserver doesn't pass all EDNS-Checks: ns1.asuscomm.com / 2408:8206:78a1:5eb1:f159:d3a1:ce29:58a9: OP100: fatal timeout. FLAGS: fatal timeout. V1: fatal timeout. V1OP100: fatal timeout. V1FLAGS: fatal timeout. DNSSEC: fatal timeout. V1DNSSEC: fatal timeout. NSID: fatal timeout. COOKIE: fatal timeout. CLIENTSUBNET: fatal timeout. Nameserver doesn't pass all EDNS-Checks: ns2.asuscomm.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. 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 http://xanthippe.asuscomm.com/.well-known/acme-challenge/check-your-website-dot-server-daten-dot-de 24.251.176.181 Fatal: Check of /.well-known/acme-challenge/random-filename has a timeout. Creating a Letsencrypt certificate via http-01 challenge can't work. You need a running webserver (http) and an open port 80. If it's a home server + ipv4, perhaps a correct port forwarding port 80 extern ⇒ working port intern is required. Port 80 / http can redirect to another domain port 80 or port 443, but not other ports. If it's a home server, perhaps your ISP blocks port 80. Then you may use the dns-01 challenge. Trouble creating a certificate? Use https://community.letsencrypt.org/ to ask. https://xanthippe.asuscomm.com/ 24.251.176.181 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. https://24.251.176.181/ 24.251.176.181 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. Warning: CSS / JavaScript found without GZip support. Send these ressources with GZip. 2 external CSS / JavaScript files without GZip found - 0 with GZip, 2 complete Warning: CSS / JavaScript files with a missing or too short Cache-Control header found. Browsers should cache and re-use these files. 4 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, 4 complete. A Good: All checked attribute values are enclosed in quotation marks (" or '). 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: 471990 milliseconds, 471.990 seconds