| 1. General Results, most used to calculate the result |
| A | name "home.jihyo.pe.kr" is subdomain, public suffix is ".pe.kr", top-level-domain is ".kr", top-level-domain-type is "country-code", Country is Korea (the Republic of), tld-manager is "Korea Internet & Security Agency (KISA)", num .kr-domains preloaded: 154 (complete: 245733)
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| A | Good: All ip addresses are public addresses
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| A | DNS: "Name Error" means: No www-dns-entry defined. This isn't a problem
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| A | Good: destination is https
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| A | Good - only one version with Http-Status 200
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| A | Good: one preferred version: non-www is preferred
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| A | Good: No cookie sent via http.
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| A | Good: HSTS has preload directive
|
| Warning: HSTS preload sent, but not in Preload-List. Never send a preload directive if you don't know what preload means. Check https://hstspreload.org/ to learn the basics about the Google-Preload list. If you send a preload directive, you should **immediately** add your domain to the HSTS preload list via https://hstspreload.org/ . If Google accepts the domain, so the status is "pending": Note that new entries are hardcoded into the Chrome source code and can take several months before they reach the stable version. So you will see this message some months. If you don't want that or if you don't understand "preload", but if you send a preload directive and if you have correct A-redirects, everybody can add your domain to that list. Then you may have problems, it's not easy to undo that. So if you don't want your domain preloaded, remove the preload directive.
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| HSTS-Preload-Status: unknown. Domain never included in the Preload-list. Check https://hstspreload.org/ to learn some basics about the Google-Preload-List.
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| A | Good: Some urls with http status 200/404 have a complete Content-Type header (MediaType / MediaSubType + correct charset):1 complete Content-Type - header (2 urls)
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| https://home.jihyo.pe.kr/.well-known/acme-challenge/check-your-website-dot-server-daten-dot-de
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| Url with incomplete Content-Type - header - missing charset
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| A | http://home.jihyo.pe.kr/ 219.241.149.4
| https://home.jihyo.pe.kr/
| Correct redirect http - https with the same domain name
|
| X | Fatal error: Nameserver doesn't support TCP connection: ns1.duckdns.org: Timeout
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| X | Fatal error: Nameserver doesn't support TCP connection: ns1.duckdns.org / 99.79.143.35: Timeout
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| X | Fatal error: Nameserver doesn't support TCP connection: ns2.duckdns.org: Timeout
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| X | Fatal error: Nameserver doesn't support TCP connection: ns2.duckdns.org / 35.182.183.211: Timeout
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| X | Fatal error: Nameserver doesn't support TCP connection: ns4.duckdns.org / 3.97.51.116: Timeout
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| X | Fatal error: Nameserver doesn't support TCP connection: ns5.duckdns.org / 99.79.16.64: Timeout
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| X | Fatal error: Nameserver doesn't support TCP connection: ns6.duckdns.org: Timeout
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| X | Fatal error: Nameserver doesn't support TCP connection: ns7.duckdns.org / 15.223.21.81: Timeout
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| 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.home.jihyo.pe.kr
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| 2. Header-Checks (Cross-Origin-* headers are alpha - started 2024-06-05) |
| A | home.jihyo.pe.kr 219.241.149.4
| X-Content-Type-Options
| Ok: Header without syntax errors found: nosniff
|
| A |
| Referrer-Policy
| Ok: Header without syntax errors found: no-referrer
|
| A |
| X-Frame-Options
| Ok: Header without syntax errors found: SAMEORIGIN
|
| B |
|
| Info: Header is deprecated. May not longer work in modern browsers. SAMEORIGIN. Better solution: Use a Content-Security-Policy Header with a frame-ancestors directive. DENY - use 'none', SAMEORIGIN - use 'self'. If you want to allow some domains to frame your page, add these urls.
|
| F | home.jihyo.pe.kr 219.241.149.4
| Content-Security-Policy
| Critical: Missing Header:
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| F | home.jihyo.pe.kr 219.241.149.4
| Permissions-Policy
| Critical: Missing Header:
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| B | home.jihyo.pe.kr 219.241.149.4
| Cross-Origin-Embedder-Policy
| Info: Missing Header
|
| B | home.jihyo.pe.kr 219.241.149.4
| Cross-Origin-Opener-Policy
| Info: Missing Header
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| B | home.jihyo.pe.kr 219.241.149.4
| Cross-Origin-Resource-Policy
| Info: Missing Header
|
| 3. DNS- and NameServer - Checks |
| A | Info:: 2 Root-climbing DNS Queries required to find all IPv4- and IPv6-Addresses of 4 Name Servers.
|
| A | Info:: 2 Queries complete, 2 with IPv6, 0 with IPv4.
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| 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.hosting.co.kr (121.254.170.11), ns2.hosting.co.kr (114.108.175.146), ns3.hosting.co.kr (121.254.170.12), ns4.hosting.co.kr (43.201.141.93)
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| A | Good (1 - 3.0):: An average of 0.5 queries per domain name server required to find all ip addresses of all name servers.
|
| A | Info:: 4 different Name Servers found: ns1.hosting.co.kr, ns2.hosting.co.kr, ns3.hosting.co.kr, ns4.hosting.co.kr, 4 Name Servers included in Delegation: ns1.hosting.co.kr, ns2.hosting.co.kr, ns3.hosting.co.kr, ns4.hosting.co.kr, 4 Name Servers included in 1 Zone definitions: ns1.hosting.co.kr, ns2.hosting.co.kr, ns3.hosting.co.kr, ns4.hosting.co.kr, 1 Name Servers listed in SOA.Primary: ns1.hosting.co.kr.
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| A | Good: Only one SOA.Primary Name Server found.: ns1.hosting.co.kr.
|
| A | Good: SOA.Primary Name Server included in the delegation set.: ns1.hosting.co.kr.
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| A | Good: All Name Server Domain Names have a Public Suffix.
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| A | Good: All Name Server Domain Names ending with a Public Suffix have minimal one IPv4- or IPv6 address.
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| A | Good: All Name Server ip addresses are public.
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| A | Info: Ipv4-Subnet-list: 4 Name Servers, 3 different subnets (first Byte): 114., 121., 43., 3 different subnets (first two Bytes): 114.108., 121.254., 43.201., 3 different subnets (first three Bytes): 114.108.175., 121.254.170., 43.201.141.
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| A | Good: Name Server IPv4-addresses from different subnet found:
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| A | Good: Nameserver supports TCP connections: 4 good Nameserver
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| A | Good: Nameserver supports Echo Capitalization: 4 good Nameserver
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| X | Nameserver Timeout checking Echo Capitalization: ns1.duckdns.org
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| X | Nameserver Timeout checking Echo Capitalization: ns1.duckdns.org / 99.79.143.35
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| X | Nameserver Timeout checking Echo Capitalization: ns2.duckdns.org
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| X | Nameserver Timeout checking Echo Capitalization: ns2.duckdns.org / 35.182.183.211
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| X | Nameserver Timeout checking Echo Capitalization: ns4.duckdns.org / 3.97.51.116
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| X | Nameserver Timeout checking Echo Capitalization: ns5.duckdns.org / 99.79.16.64
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| X | Nameserver Timeout checking Echo Capitalization: ns6.duckdns.org
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| X | Nameserver Timeout checking Echo Capitalization: ns7.duckdns.org / 15.223.21.81
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| X | Fatal error: Nameserver doesn't support EDNS with max. 512 Byte Udp payload or sends more then 512 Bytes: ns1.hosting.co.kr
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| X | Fatal error: Nameserver doesn't support EDNS with max. 512 Byte Udp payload or sends more then 512 Bytes: ns2.hosting.co.kr
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| X | Fatal error: Nameserver doesn't support EDNS with max. 512 Byte Udp payload or sends more then 512 Bytes: ns3.hosting.co.kr
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| X | Fatal error: Nameserver doesn't support EDNS with max. 512 Byte Udp payload or sends more then 512 Bytes: ns4.hosting.co.kr
|
| Nameserver doesn't pass all EDNS-Checks: ns1.duckdns.org: OP100: fatal timeout. FLAGS: fatal timeout. V1: fatal timeout. V1OP100: SOA NOT expected, but found, BADVER expected, NOERR found, Version 0 expectend and found, no OPT100 expected, no OPT100 found. V1FLAGS: fatal timeout. DNSSEC: fatal timeout. V1DNSSEC: fatal timeout. NSID: fatal timeout. COOKIE: fatal timeout. CLIENTSUBNET: fatal timeout.
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| Nameserver doesn't pass all EDNS-Checks: ns1.duckdns.org / 99.79.143.35: OP100: fatal timeout. FLAGS: fatal timeout. V1: fatal timeout. V1OP100: fatal timeout. V1FLAGS: fatal timeout. DNSSEC: fatal timeout. V1DNSSEC: fatal timeout. NSID: ok. COOKIE: fatal timeout. CLIENTSUBNET: fatal timeout.
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| Nameserver doesn't pass all EDNS-Checks: ns1.hosting.co.kr: 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.
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| Nameserver doesn't pass all EDNS-Checks: ns1.hosting.co.kr / 121.254.170.11: 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 (ns1.hosting.co.kr). COOKIE: ok. CLIENTSUBNET: no result.
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| Nameserver doesn't pass all EDNS-Checks: ns2.duckdns.org: OP100: fatal timeout. FLAGS: fatal timeout. V1: fatal timeout. V1OP100: fatal timeout. V1FLAGS: SOA NOT expected, but found, BADVER expected, NOERR found, Version 0 expectend and found. DNSSEC: fatal timeout. V1DNSSEC: fatal timeout. NSID: fatal timeout. COOKIE: fatal timeout. CLIENTSUBNET: fatal timeout.
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| Nameserver doesn't pass all EDNS-Checks: ns2.duckdns.org / 35.182.183.211: OP100: fatal timeout. FLAGS: ok. V1: fatal timeout. V1OP100: fatal timeout. V1FLAGS: fatal timeout. DNSSEC: fatal timeout. V1DNSSEC: fatal timeout. NSID: fatal timeout. COOKIE: ok. CLIENTSUBNET: fatal timeout.
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| Nameserver doesn't pass all EDNS-Checks: ns2.hosting.co.kr / 114.108.175.146: 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 (ns2.hosting.co.kr). COOKIE: ok. CLIENTSUBNET: no result.
|
| Nameserver doesn't pass all EDNS-Checks: ns3.duckdns.org: 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.
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| Nameserver doesn't pass all EDNS-Checks: ns3.hosting.co.kr / 121.254.170.12: 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.hosting.co.kr). COOKIE: ok. CLIENTSUBNET: no result.
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| Nameserver doesn't pass all EDNS-Checks: ns4.duckdns.org / 3.97.51.116: OP100: fatal timeout. FLAGS: fatal timeout. V1: fatal timeout. V1OP100: SOA NOT expected, but found, BADVER expected, NOERR found, Version 0 expectend and found, no OPT100 expected, no OPT100 found. V1FLAGS: fatal timeout. DNSSEC: fatal timeout. V1DNSSEC: fatal timeout. NSID: fatal timeout. COOKIE: fatal timeout. CLIENTSUBNET: fatal timeout.
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| Nameserver doesn't pass all EDNS-Checks: ns4.hosting.co.kr / 43.201.141.93: 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 (ip-172-16-10-232.ap-northeast-2.compute.internal). COOKIE: ok. CLIENTSUBNET: no result.
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| Nameserver doesn't pass all EDNS-Checks: ns5.duckdns.org / 99.79.16.64: OP100: fatal timeout. FLAGS: fatal timeout. V1: SOA NOT expected, but found, BADVER expected, NOERR found, Version 0 expectend and found. V1OP100: fatal timeout. V1FLAGS: fatal timeout. DNSSEC: fatal timeout. V1DNSSEC: fatal timeout. NSID: fatal timeout. COOKIE: fatal timeout. CLIENTSUBNET: fatal timeout.
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| Nameserver doesn't pass all EDNS-Checks: ns6.duckdns.org: 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.
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| Nameserver doesn't pass all EDNS-Checks: ns7.duckdns.org / 15.223.21.81: OP100: fatal timeout. FLAGS: fatal timeout. V1: fatal timeout. V1OP100: fatal timeout. V1FLAGS: fatal timeout. DNSSEC: fatal timeout. V1DNSSEC: fatal timeout. NSID: ok. COOKIE: fatal timeout. CLIENTSUBNET: fatal timeout.
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| Nameserver doesn't pass all EDNS-Checks: ns8.duckdns.org: 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.
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| Nameserver doesn't pass all EDNS-Checks: ns9.duckdns.org: 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 |
| A | Good: All checks /.well-known/acme-challenge/random-filename without redirects answer with the expected http status 404 - Not Found. Creating a Letsencrypt certificate via http-01 challenge should work. If it doesn't work: Check your vHost configuration (apachectl -S, httpd -S, nginx -T). Every combination of port and ServerName / ServerAlias (Apache) or Server (Nginx) must be unique. Merge duplicated entries in one vHost. If you use an IIS, extensionless files must be allowed in the /.well-known/acme-challenge subdirectory. Create a web.config in that directory. Content: <configuration><system.webServer><staticContent><mimeMap fileExtension="." mimeType="text/plain" /></staticContent></system.webServer></configuration>. If you have a redirect http ⇒ https, that's ok, Letsencrypt follows such redirects to port 80 / 443 (same or other server). There must be a certificate. But the certificate may be expired, self signed or with a not matching domain name. Checking the validation file Letsencrypt ignores such certificate errors. Trouble creating a certificate? Use https://community.letsencrypt.org/ to ask.
|
| A | Good: Every https result with status 200 and greater 1024 Bytes is compressed (gzip, deflate, br checked).
|
| https://home.jihyo.pe.kr/ 219.241.149.4
|
| Warning: Https + http status 200 + Inline CSS / JavaScript found. Don't use inline CSS / JavaScript. These are compiled and re-used ressources, save these with a long Cache-Control max-age - header.
|
| https://home.jihyo.pe.kr/ 219.241.149.4
|
| Warning: Https result with status 200 found, Html-Content is too big. Should be max. 110 %. May contain inline CSS / JavaScript, too much comments or white space. Re-used ressources - create files with a long Cache-Control max-age header. Remove comments and white space.
|
| A | Good: Every https connection via port 443 supports the http/2 protocol via ALPN.
|
| 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://home.jihyo.pe.kr/.well-known/acme-challenge/check-your-website-dot-server-daten-dot-de
| 7.606 seconds
| Warning: 404 needs more then one second
|
| A | Duration: 1185870 milliseconds, 1185.870 seconds
|
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