1. General Results, most used to calculate the result A name "docportal.abfr.be" is subdomain, public suffix is ".be", top-level-domain is ".be", top-level-domain-type is "country-code", Country is Belgium, tld-manager is "DNS Belgium vzw/asbl", num .be-domains preloaded: 1022 (complete: 175327) A good: All ip addresses are public addresses Warning: Only one ip address found: docportal.abfr.be 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: docportal.abfr.be 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. A Good: All urls with http status 200/404 have a complete Content-Type header (MediaType / MediaSubType + correct charset) B https://docportal.abfr.be/ 81.83.15.197 Missing HSTS-Header C Error - no version with Http-Status 200 H fatal error: No https - result with http-status 200, no encryption M https://docportal.abfr.be/ 81.83.15.197 Misconfiguration - main pages should never send http status 400 - 499 M https://81.83.15.197/ 81.83.15.197 Misconfiguration - main pages should never send http status 400 - 499 N https://docportal.abfr.be/ 81.83.15.197 Error - Certificate isn't trusted, RemoteCertificateNameMismatch N https://81.83.15.197/ 81.83.15.197 Error - Certificate isn't trusted, RemoteCertificateNameMismatch 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 docportal.abfr.be, 1 ip addresses, 1 different http results. 2. DNS- and NameServer - Checks A Info:: 4 Root-climbing DNS Queries required to find all IPv4- and IPv6-Addresses of 4 Name Servers. A Info:: 4 Queries complete, 4 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.ns3.combell.net (2a00:1c98::53:1, 83.217.73.172), ns3.european-server.com (2a00:1c98::53:1, 83.217.73.172), ns4.combell.net (2001:1598:0:101::3, 86.39.202.67), ns4.european-server.com (2001:1598:0:101::3, 86.39.202.67) A Good (1 - 3.0):: An average of 1.0 queries per domain name server required to find all ip addresses of all name servers. A Info:: 4 different Name Servers found: ns3.combell.net, ns3.european-server.com, ns4.combell.net, ns4.european-server.com, 2 Name Servers included in Delegation: ns3.combell.net, ns4.combell.net, 2 Name Servers included in 1 Zone definitions: ns3.european-server.com, ns4.european-server.com, 1 Name Servers listed in SOA.Primary: ns3.european-server.com. A Good: Only one SOA.Primary Name Server found.: ns3.european-server.com. Error: SOA.Primary Name Server not included in the delegation set.: ns3.european-server.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.: ns3.combell.net (2a00:1c98::53:1): Delegation: ns3.combell.net, ns4.combell.net, Zone: ns3.european-server.com, ns4.european-server.com. Name Servers defined in Delegation, missing in Zone: ns3.combell.net, ns4.combell.net.Name Servers defined in Zone, missing in Delegation: ns3.european-server.com, ns4.european-server.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.: ns3.european-server.com (2a00:1c98::53:1): Delegation: ns3.combell.net, ns4.combell.net, Zone: ns3.european-server.com, ns4.european-server.com. Name Servers defined in Delegation, missing in Zone: ns3.combell.net, ns4.combell.net.Name Servers defined in Zone, missing in Delegation: ns3.european-server.com, ns4.european-server.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.: ns4.combell.net (2001:1598:0:101::3): Delegation: ns3.combell.net, ns4.combell.net, Zone: ns3.european-server.com, ns4.european-server.com. Name Servers defined in Delegation, missing in Zone: ns3.combell.net, ns4.combell.net.Name Servers defined in Zone, missing in Delegation: ns3.european-server.com, ns4.european-server.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.: ns4.european-server.com (2001:1598:0:101::3): Delegation: ns3.combell.net, ns4.combell.net, Zone: ns3.european-server.com, ns4.european-server.com. Name Servers defined in Delegation, missing in Zone: ns3.combell.net, ns4.combell.net.Name Servers defined in Zone, missing in Delegation: ns3.european-server.com, ns4.european-server.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 A Info: IPv6-Subnet-list: 4 Name Servers with IPv6, 2 different subnets (first block): 2001:, 2a00:, 2 different subnets (first two blocks): 2001:1598:, 2a00:1c98:, 2 different subnets (first three blocks): 2001:1598:0000:, 2a00:1c98:0000:, 2 different subnets (first four blocks): 2001:1598:0000:0101:, 2a00:1c98:0000:0000: A Good: Name Server IPv6 addresses from different subnets found. A Good: Nameserver supports TCP connections: 4 good Nameserver A Good: Nameserver supports Echo Capitalization: 4 good Nameserver A Good: Nameserver supports EDNS with max. 512 Byte Udp payload, message is smaller: 4 good Nameserver Nameserver doesn't pass all EDNS-Checks: ns3.european-server.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: ns3.european-server.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. 3. Content- and Performance-critical Checks http://docportal.abfr.be/.well-known/acme-challenge/check-your-website-dot-server-daten-dot-de 81.83.15.197 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 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 https://docportal.abfr.be/ 81.83.15.197 6.080 seconds Warning: 404 needs more then one second https://81.83.15.197/ 81.83.15.197 5.674 seconds Warning: 404 needs more then one second A Duration: 117454 milliseconds, 117.454 seconds