1. General Results, most used to calculate the result A name "venuebuilder.brandenburg.com.au" is subdomain, public suffix is ".com.au", top-level-domain is ".au", top-level-domain-type is "country-code", Country is Australia, tld-manager is ".au Domain Administration (auDA)", num .au-domains preloaded: 1614 (complete: 175327) A Good: All ip addresses are public addresses Warning: Only one ip address found: venuebuilder.brandenburg.com.au 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: venuebuilder.brandenburg.com.au 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 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://venuebuilder.brandenburg.com.au/ 20.211.100.108 http://venuebuilder.brandenburg.com.au/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://venuebuilder.brandenburg.com.au/.well-known/acme-challenge/check-your-website-dot-server-daten-dot-de 20.211.100.108 http://venuebuilder.brandenburg.com.au/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. 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 venuebuilder.brandenburg.com.au, 1 ip addresses. 2. Header-Checks (alpha, started 2022-10-23, may be buggy / incomplete) 3. DNS- and NameServer - Checks A Info:: 6 Root-climbing DNS Queries required to find all IPv4- and IPv6-Addresses of 4 Name Servers. A Info:: 6 Queries complete, 6 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.dalegroup.net (103.209.4.4), ns2.dalegroup.net (103.24.132.32, 2406:bf00::3), ns3.dalegroup.net (2605:2700:0:5::4713:95f5, 71.19.149.245), ns4.dalegroup.net (188.226.131.167, 2a03:b0c0:0:1010::71:3001) A Good (1 - 3.0):: An average of 1.5 queries per domain name server required to find all ip addresses of all name servers. A Info:: 5 different Name Servers found: ns1.dalegroup.net, ns2.dalegroup.net, ns3.dalegroup.net, ns4.dalegroup.net, ns5.dalegroup.net.au, 4 Name Servers included in Delegation: ns1.dalegroup.net, ns2.dalegroup.net, ns3.dalegroup.net, ns4.dalegroup.net, 5 Name Servers included in 1 Zone definitions: ns1.dalegroup.net, ns2.dalegroup.net, ns3.dalegroup.net, ns4.dalegroup.net, ns5.dalegroup.net.au, 1 Name Servers listed in SOA.Primary: ns2.dalegroup.net. A Good: Only one SOA.Primary Name Server found.: ns2.dalegroup.net. A Good: SOA.Primary Name Server included in the delegation set.: ns2.dalegroup.net. 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.dalegroup.net (103.209.4.4): Delegation: ns1.dalegroup.net, ns2.dalegroup.net, ns3.dalegroup.net, ns4.dalegroup.net, Zone: ns1.dalegroup.net, ns2.dalegroup.net, ns3.dalegroup.net, ns4.dalegroup.net, ns5.dalegroup.net.au. Name Servers defined in Zone, missing in Delegation: ns5.dalegroup.net.au. 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.: ns2.dalegroup.net (103.24.132.32): Delegation: ns1.dalegroup.net, ns2.dalegroup.net, ns3.dalegroup.net, ns4.dalegroup.net, Zone: ns1.dalegroup.net, ns2.dalegroup.net, ns3.dalegroup.net, ns4.dalegroup.net, ns5.dalegroup.net.au. Name Servers defined in Zone, missing in Delegation: ns5.dalegroup.net.au. 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.: ns2.dalegroup.net (2406:bf00::3): Delegation: ns1.dalegroup.net, ns2.dalegroup.net, ns3.dalegroup.net, ns4.dalegroup.net, Zone: ns1.dalegroup.net, ns2.dalegroup.net, ns3.dalegroup.net, ns4.dalegroup.net, ns5.dalegroup.net.au. Name Servers defined in Zone, missing in Delegation: ns5.dalegroup.net.au. 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.: ns3.dalegroup.net (71.19.149.245): Delegation: ns1.dalegroup.net, ns2.dalegroup.net, ns3.dalegroup.net, ns4.dalegroup.net, Zone: ns1.dalegroup.net, ns2.dalegroup.net, ns3.dalegroup.net, ns4.dalegroup.net, ns5.dalegroup.net.au. Name Servers defined in Zone, missing in Delegation: ns5.dalegroup.net.au. 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.: ns3.dalegroup.net (2605:2700:0:5::4713:95f5): Delegation: ns1.dalegroup.net, ns2.dalegroup.net, ns3.dalegroup.net, ns4.dalegroup.net, Zone: ns1.dalegroup.net, ns2.dalegroup.net, ns3.dalegroup.net, ns4.dalegroup.net, ns5.dalegroup.net.au. Name Servers defined in Zone, missing in Delegation: ns5.dalegroup.net.au. 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.: ns4.dalegroup.net (188.226.131.167): Delegation: ns1.dalegroup.net, ns2.dalegroup.net, ns3.dalegroup.net, ns4.dalegroup.net, Zone: ns1.dalegroup.net, ns2.dalegroup.net, ns3.dalegroup.net, ns4.dalegroup.net, ns5.dalegroup.net.au. Name Servers defined in Zone, missing in Delegation: ns5.dalegroup.net.au. 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.: ns4.dalegroup.net (2a03:b0c0:0:1010::71:3001): Delegation: ns1.dalegroup.net, ns2.dalegroup.net, ns3.dalegroup.net, ns4.dalegroup.net, Zone: ns1.dalegroup.net, ns2.dalegroup.net, ns3.dalegroup.net, ns4.dalegroup.net, ns5.dalegroup.net.au. Name Servers defined in Zone, missing in Delegation: ns5.dalegroup.net.au. 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.: ns5.dalegroup.net.au (103.209.4.4): Delegation: ns1.dalegroup.net, ns2.dalegroup.net, ns3.dalegroup.net, ns4.dalegroup.net, Zone: ns1.dalegroup.net, ns2.dalegroup.net, ns3.dalegroup.net, ns4.dalegroup.net, ns5.dalegroup.net.au. Name Servers defined in Zone, missing in Delegation: ns5.dalegroup.net.au. 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.: ns5.dalegroup.net.au (2406:bf00:1:101::3): Delegation: ns1.dalegroup.net, ns2.dalegroup.net, ns3.dalegroup.net, ns4.dalegroup.net, Zone: ns1.dalegroup.net, ns2.dalegroup.net, ns3.dalegroup.net, ns4.dalegroup.net, ns5.dalegroup.net.au. Name Servers defined in Zone, missing in Delegation: ns5.dalegroup.net.au. 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: 5 different Name Servers found A Good: Some Name Servers have IPv6 addresses: 4 Name Servers with IPv6 found (1 Name Servers without IPv6) A Good: Name servers with different Top Level Domains / Public Suffix List entries found: 5 Name Servers, 2 Top Level Domains: net, net.au A Good: Name Servers with different domain names found.: 2 different Domains found A Good: Name servers with different Country locations found: 5 Name Servers, 3 Countries: AU, NL, US A Info: Ipv4-Subnet-list: 5 Name Servers, 3 different subnets (first Byte): 103., 188., 71., 4 different subnets (first two Bytes): 103.209., 103.24., 188.226., 71.19., 4 different subnets (first three Bytes): 103.209.4., 103.24.132., 188.226.131., 71.19.149. A Good: Name Server IPv4-addresses from different subnet found: A Info: IPv6-Subnet-list: 4 Name Servers with IPv6, 3 different subnets (first block): 2406:, 2605:, 2a03:, 3 different subnets (first two blocks): 2406:bf00:, 2605:2700:, 2a03:b0c0:, 4 different subnets (first three blocks): 2406:bf00:0000:, 2406:bf00:0001:, 2605:2700:0000:, 2a03:b0c0:0000:, 4 different subnets (first four blocks): 2406:bf00:0000:0000:, 2406:bf00:0001:0101:, 2605:2700:0000:0005:, 2a03:b0c0:0000:1010: A Good: Name Server IPv6 addresses from different subnets found. A Good: Nameserver supports TCP connections: 2 good Nameserver A Good: Nameserver supports Echo Capitalization: 2 good Nameserver A Good: Nameserver supports EDNS with max. 512 Byte Udp payload, message is smaller: 2 good Nameserver A Good: Nameserver has passed 10 EDNS-Checks (OP100, FLAGS, V1, V1OP100, V1FLAGS, DNSSEC, V1DNSSEC, NSID, COOKIE, CLIENTSUBNET): 2 good Nameserver Nameserver doesn't pass all EDNS-Checks: ns1.dalegroup.net / 103.209.4.4: OP100: ok. FLAGS: ok. V1: SOA NOT expected, but found, BADVER expected, NOERR found, Version 0 expectend and found. V1OP100: SOA NOT expected, but found, BADVER expected, NOERR found, Version 0 expectend and found, no OPT100 expected, no OPT100 found. V1FLAGS: SOA NOT expected, but found, BADVER expected, NOERR found, Version 0 expectend and found. DNSSEC: ok. V1DNSSEC: SOA NOT expected, but found, BADVER expected, NOERR found, Version 0 expectend and found. NSID: ok (ns5). COOKIE: ok. CLIENTSUBNET: ok. Nameserver doesn't pass all EDNS-Checks: ns2.dalegroup.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. Nameserver doesn't pass all EDNS-Checks: ns3.dalegroup.net / 71.19.149.245: OP100: ok. FLAGS: ok. V1: SOA NOT expected, but found, BADVER expected, NOERR found, Version 0 expectend and found. V1OP100: SOA NOT expected, but found, BADVER expected, NOERR found, Version 0 expectend and found, no OPT100 expected, no OPT100 found. V1FLAGS: SOA NOT expected, but found, BADVER expected, NOERR found, Version 0 expectend and found. DNSSEC: ok. V1DNSSEC: SOA NOT expected, but found, BADVER expected, NOERR found, Version 0 expectend and found. NSID: ok (ns3.dalegroup.net). COOKIE: ok. CLIENTSUBNET: ok. Nameserver doesn't pass all EDNS-Checks: ns3.dalegroup.net / 2605:2700:0:5::4713:95f5: OP100: ok. FLAGS: ok. V1: SOA NOT expected, but found, BADVER expected, NOERR found, Version 0 expectend and found. V1OP100: SOA NOT expected, but found, BADVER expected, NOERR found, Version 0 expectend and found, no OPT100 expected, no OPT100 found. V1FLAGS: SOA NOT expected, but found, BADVER expected, NOERR found, Version 0 expectend and found. DNSSEC: ok. V1DNSSEC: SOA NOT expected, but found, BADVER expected, NOERR found, Version 0 expectend and found. NSID: ok (ns3.dalegroup.net). COOKIE: ok. CLIENTSUBNET: ok. Nameserver doesn't pass all EDNS-Checks: ns4.dalegroup.net / 188.226.131.167: OP100: ok. FLAGS: ok. V1: SOA NOT expected, but found, BADVER expected, NOERR found, Version 0 expectend and found. V1OP100: SOA NOT expected, but found, BADVER expected, NOERR found, Version 0 expectend and found, no OPT100 expected, no OPT100 found. V1FLAGS: SOA NOT expected, but found, BADVER expected, NOERR found, Version 0 expectend and found. DNSSEC: ok. V1DNSSEC: SOA NOT expected, but found, BADVER expected, NOERR found, Version 0 expectend and found. NSID: ok (ns4.dalegroup.net). COOKIE: ok. CLIENTSUBNET: ok. Nameserver doesn't pass all EDNS-Checks: ns4.dalegroup.net / 2a03:b0c0:0:1010::71:3001: OP100: ok. FLAGS: ok. V1: SOA NOT expected, but found, BADVER expected, NOERR found, Version 0 expectend and found. V1OP100: SOA NOT expected, but found, BADVER expected, NOERR found, Version 0 expectend and found, no OPT100 expected, no OPT100 found. V1FLAGS: SOA NOT expected, but found, BADVER expected, NOERR found, Version 0 expectend and found. DNSSEC: ok. V1DNSSEC: SOA NOT expected, but found, BADVER expected, NOERR found, Version 0 expectend and found. NSID: ok (ns4.dalegroup.net). COOKIE: ok. CLIENTSUBNET: ok. Nameserver doesn't pass all EDNS-Checks: ns5.dalegroup.net.au / 103.209.4.4: OP100: ok. FLAGS: ok. V1: SOA NOT expected, but found, BADVER expected, NOERR found, Version 0 expectend and found. V1OP100: SOA NOT expected, but found, BADVER expected, NOERR found, Version 0 expectend and found, no OPT100 expected, no OPT100 found. V1FLAGS: SOA NOT expected, but found, BADVER expected, NOERR found, Version 0 expectend and found. DNSSEC: ok. V1DNSSEC: SOA NOT expected, but found, BADVER expected, NOERR found, Version 0 expectend and found. NSID: ok (ns5). COOKIE: ok. CLIENTSUBNET: ok. Nameserver doesn't pass all EDNS-Checks: ns5.dalegroup.net.au / 2406:bf00:1:101::3: OP100: ok. FLAGS: ok. V1: SOA NOT expected, but found, BADVER expected, NOERR found, Version 0 expectend and found. V1OP100: SOA NOT expected, but found, BADVER expected, NOERR found, Version 0 expectend and found, no OPT100 expected, no OPT100 found. V1FLAGS: SOA NOT expected, but found, BADVER expected, NOERR found, Version 0 expectend and found. DNSSEC: ok. V1DNSSEC: SOA NOT expected, but found, BADVER expected, NOERR found, Version 0 expectend and found. NSID: ok (ns5). COOKIE: ok. CLIENTSUBNET: ok. 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 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: 245990 milliseconds, 245.990 seconds