1. General Results, most used to calculate the result A name "kenthgundersen.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: 83852 (complete: 216710) A Good: All ip addresses are public addresses Warning: Only one ip address found: kenthgundersen.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: kenthgundersen.asuscomm.com has no ipv6 address. A Good: No asked Authoritative Name Server had a timeout A DNS: "Name Error" means: No www-dns-entry defined. This isn't a problem HSTS-Preload-Status: unknown. Domain never included in the Preload-list. Check https://hstspreload.org/ to learn some basics about the Google-Preload-List. X Fatal error: Nameserver doesn't support TCP connection: ns1.asuscomm.com / 52.250.42.40: Timeout 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 kenthgundersen.asuscomm.com, 1 ip addresses. 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.kenthgundersen.asuscomm.com 2. Header-Checks U No https result with http status 2** or 4** (standard-check) found, no header checked. 3. DNS- and NameServer - Checks A Info:: 2 Root-climbing DNS Queries required to find all IPv4- and IPv6-Addresses of 1 Name Servers. A Info:: 2 Queries complete, 2 with IPv6, 0 with IPv4. A Good: All DNS Queries done via IPv6. 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.ns1.asuscomm.com (52.250.42.40) A Good (1 - 3.0):: An average of 2.0 queries per domain name server required to find all ip addresses of all name servers. A Info:: 2 different Name Servers found: ns1.asuscomm.com, ns2.asuscomm.com, 2 Name Servers included in Delegation: ns1.asuscomm.com, ns2.asuscomm.com, 1 Name Servers included in 2 Zone definitions: ns1.asuscomm.com, 1 Name Servers listed in SOA.Primary: ns1.asuscomm.com. A Good: Only one SOA.Primary Name Server found.: ns1.asuscomm.com. A Good: SOA.Primary Name Server included in the delegation set.: ns1.asuscomm.com. X Fatal: Inconsistency 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. Read https://www.iana.org/help/nameserver-requirements and send it to your Name Server Hoster.: ns1.asuscomm.com (52.250.42.40): Delegation: ns1.asuscomm.com, ns2.asuscomm.com, Zone: ns1.asuscomm.com. Name Servers defined in Delegation, missing in Zone: ns2.asuscomm.com. A Good: All Name Server Domain Names have a Public Suffix. Error: Name Server Domain Names with Public Suffix and without ip address found.: 1 Name Servers without ipv4 and ipv6: 1 Warning: No Name Server IPv6 address found. IPv6 is the future, so your name servers should be visible via IPv6.: 1 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.: 1 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: asuscomm.com Warning: All Name Servers from the same Country / IP location.: 1 Name Servers, 1 Countries: US A Info: Ipv4-Subnet-list: 1 Name Servers, 1 different subnets (first Byte): 52., 1 different subnets (first two Bytes): 52.250., 1 different subnets (first three Bytes): 52.250.42. X Fatal: All Name Server IPv4 addresses from the same subnet. Check https://www.iana.org/help/nameserver-requirements to learn some basics about name server configurations. If you manage these name servers, fix it. If it's your provider, change your provider.: X Fatal: Only one Name Server IPv4 address found. Check https://www.iana.org/help/nameserver-requirements to learn some basics about name server configurations. If you manage these name servers, fix it. If it's your provider, change your provider. A Good: Nameserver supports Echo Capitalization: 1 good Nameserver X Fatal error: Nameserver doesn't support EDNS with max. 512 Byte Udp payload or sends more then 512 Bytes: ns1.asuscomm.com Nameserver doesn't pass all EDNS-Checks: ns1.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. Nameserver doesn't pass all EDNS-Checks: ns1.asuscomm.com / 52.250.42.40: 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: ns1.asuscomm.com / 52.250.42.40: 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: 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://kenthgundersen.asuscomm.com/.well-known/acme-challenge/check-your-website-dot-server-daten-dot-de 79.161.87.242 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. 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: 371617 milliseconds, 371.617 seconds