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Checked:
24.12.2021 12:25:20

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1. IP-Addresses

Host	Type	IP-Address	is auth.	∑ Queries	∑ Timeout
jitsi.viren-profi.de	CNAME	home.viren-profi.de	yes	1	0
	A	79.201.60.121 Lenting/Bavaria/Germany (DE) - Deutsche Telekom AG Hostname: p4fc93c79.dip0.t-ipconnect.de	yes
www.jitsi.viren-profi.de		Name Error	yes	1	0
*.viren-profi.de	A	85.13.139.161	yes
	AAAA		yes
	CNAME		yes
*.jitsi.viren-profi.de	A	Name Error	yes
	AAAA	Name Error	yes
	CNAME	Name Error	yes

2. DNSSEC

Zone (*)	DNSSEC - Informations

Zone: (root)
(root)	1 DS RR published


	DS with Algorithm 8, KeyTag 20326, DigestType 2 and Digest 4G1EuAuPHTmpXAsNfGXQhFjogECbvGg0VxBCN8f47I0=


	• Status: Valid because published


	3 DNSKEY RR found


	Public Key with Algorithm 8, KeyTag 9799, Flags 256


	Public Key with Algorithm 8, KeyTag 14748, Flags 256


	Public Key with Algorithm 8, KeyTag 20326, Flags 257 (SEP = Secure Entry Point)


	1 RRSIG RR to validate DNSKEY RR found


	RRSIG-Owner (root), Algorithm: 8, 0 Labels, original TTL: 172800 sec, Signature-expiration: 10.01.2022, 00:00:00 +, Signature-Inception: 20.12.2021, 00:00:00 +, KeyTag 20326, Signer-Name: (root)


	• Status: Good - Algorithmus 8 and DNSKEY with KeyTag 20326 used to validate the DNSKEY RRSet


	• Status: Valid Chain of trust. Parent-DS with Algorithm 8, KeyTag 20326, DigestType 2 and Digest "4G1EuAuPHTmpXAsNfGXQhFjogECbvGg0VxBCN8f47I0=" validates local Key with the same values, Key ist Secure Entry Point (SEP) of the zone

Zone: de
de	1 DS RR in the parent zone found


	DS with Algorithm 8, KeyTag 26755, DigestType 2 and Digest 80E1eAmllUMRzLgq3hFMbB1ySnXAOVE3qjl4A1Ql540=


	2 RRSIG RR to validate DS RR found


	RRSIG-Owner de., Algorithm: 8, 1 Labels, original TTL: 86400 sec, Signature-expiration: 06.01.2022, 05:00:00 +, Signature-Inception: 24.12.2021, 04:00:00 +, KeyTag 14748, Signer-Name: (root)


	• Status: Good - Algorithmus 8 and DNSKEY with KeyTag 14748 used to validate the DS RRSet in the parent zone


	2 DNSKEY RR found


	Public Key with Algorithm 8, KeyTag 26755, Flags 257 (SEP = Secure Entry Point)


	Public Key with Algorithm 8, KeyTag 57564, Flags 256


	1 RRSIG RR to validate DNSKEY RR found


	RRSIG-Owner de., Algorithm: 8, 1 Labels, original TTL: 300 sec, Signature-expiration: 06.01.2022, 16:30:10 +, Signature-Inception: 23.12.2021, 15:00:10 +, KeyTag 26755, Signer-Name: de


	• Status: Good - Algorithmus 8 and DNSKEY with KeyTag 26755 used to validate the DNSKEY RRSet


	• Status: Valid Chain of trust. Parent-DS with Algorithm 8, KeyTag 26755, DigestType 2 and Digest "80E1eAmllUMRzLgq3hFMbB1ySnXAOVE3qjl4A1Ql540=" validates local Key with the same values, Key ist Secure Entry Point (SEP) of the zone

Zone: viren-profi.de
viren-profi.de	0 DS RR in the parent zone found


	DS-Query in the parent zone has a valid NSEC3 RR as result with the hashed query name "dql7pdvub0u0i18k5m6d5ji3j8jfqes5" between the hashed NSEC3-owner "dql5418i6njthvu46fqaqt3k9iqek08h" and the hashed NextOwner "dql8e7a5judk1k03mticci50qmj0rjd9". So the parent zone confirmes the not-existence of a DS RR. Bitmap: A, RRSIG Validated: RRSIG-Owner dql5418i6njthvu46fqaqt3k9iqek08h.de., Algorithm: 8, 2 Labels, original TTL: 7200 sec, Signature-expiration: 02.01.2022, 05:29:56 +, Signature-Inception: 19.12.2021, 03:59:56 +, KeyTag 57564, Signer-Name: de


	DS-Query in the parent zone sends valid NSEC3 RR with the Hash "tjlb7qbojvmlf1s6gdriru7vsms1lg16" as Owner. That's the Hash of "de" with the NextHashedOwnerName "tjlfjprvcmsth243pmi98vqtj9pgi7us". So that domain name is the Closest Encloser of "viren-profi.de". Opt-Out: True. Bitmap: NS, SOA, RRSIG, DNSKEY, NSEC3PARAM Validated: RRSIG-Owner tjlb7qbojvmlf1s6gdriru7vsms1lg16.de., Algorithm: 8, 2 Labels, original TTL: 7200 sec, Signature-expiration: 02.01.2022, 04:30:10 +, Signature-Inception: 19.12.2021, 03:00:10 +, KeyTag 57564, Signer-Name: de


	0 DNSKEY RR found




Zone: jitsi.viren-profi.de
jitsi.viren-profi.de	0 DS RR in the parent zone found

Zone: www.jitsi.viren-profi.de
www.jitsi.viren-profi.de	0 DS RR in the parent zone found

Zone: (root)
(root)	1 DS RR published


	DS with Algorithm 8, KeyTag 20326, DigestType 2 and Digest 4G1EuAuPHTmpXAsNfGXQhFjogECbvGg0VxBCN8f47I0=


	• Status: Valid because published


	3 DNSKEY RR found


	Public Key with Algorithm 8, KeyTag 9799, Flags 256


	Public Key with Algorithm 8, KeyTag 14748, Flags 256


	Public Key with Algorithm 8, KeyTag 20326, Flags 257 (SEP = Secure Entry Point)


	1 RRSIG RR to validate DNSKEY RR found


	RRSIG-Owner (root), Algorithm: 8, 0 Labels, original TTL: 172800 sec, Signature-expiration: 10.01.2022, 00:00:00 +, Signature-Inception: 20.12.2021, 00:00:00 +, KeyTag 20326, Signer-Name: (root)


	• Status: Good - Algorithmus 8 and DNSKEY with KeyTag 20326 used to validate the DNSKEY RRSet


	• Status: Valid Chain of trust. Parent-DS with Algorithm 8, KeyTag 20326, DigestType 2 and Digest "4G1EuAuPHTmpXAsNfGXQhFjogECbvGg0VxBCN8f47I0=" validates local Key with the same values, Key ist Secure Entry Point (SEP) of the zone

Zone: de
de	1 DS RR in the parent zone found


	DS with Algorithm 8, KeyTag 26755, DigestType 2 and Digest 80E1eAmllUMRzLgq3hFMbB1ySnXAOVE3qjl4A1Ql540=


	2 RRSIG RR to validate DS RR found


	RRSIG-Owner de., Algorithm: 8, 1 Labels, original TTL: 86400 sec, Signature-expiration: 06.01.2022, 05:00:00 +, Signature-Inception: 24.12.2021, 04:00:00 +, KeyTag 14748, Signer-Name: (root)


	• Status: Good - Algorithmus 8 and DNSKEY with KeyTag 14748 used to validate the DS RRSet in the parent zone


	2 DNSKEY RR found


	Public Key with Algorithm 8, KeyTag 26755, Flags 257 (SEP = Secure Entry Point)


	Public Key with Algorithm 8, KeyTag 57564, Flags 256


	1 RRSIG RR to validate DNSKEY RR found


	RRSIG-Owner de., Algorithm: 8, 1 Labels, original TTL: 300 sec, Signature-expiration: 06.01.2022, 16:30:10 +, Signature-Inception: 23.12.2021, 15:00:10 +, KeyTag 26755, Signer-Name: de


	• Status: Good - Algorithmus 8 and DNSKEY with KeyTag 26755 used to validate the DNSKEY RRSet


	• Status: Valid Chain of trust. Parent-DS with Algorithm 8, KeyTag 26755, DigestType 2 and Digest "80E1eAmllUMRzLgq3hFMbB1ySnXAOVE3qjl4A1Ql540=" validates local Key with the same values, Key ist Secure Entry Point (SEP) of the zone

Zone: viren-profi.de
viren-profi.de	0 DS RR in the parent zone found


	DS-Query in the parent zone has a valid NSEC3 RR as result with the hashed query name "dql7pdvub0u0i18k5m6d5ji3j8jfqes5" between the hashed NSEC3-owner "dql5418i6njthvu46fqaqt3k9iqek08h" and the hashed NextOwner "dql8e7a5judk1k03mticci50qmj0rjd9". So the parent zone confirmes the not-existence of a DS RR. Bitmap: A, RRSIG Validated: RRSIG-Owner dql5418i6njthvu46fqaqt3k9iqek08h.de., Algorithm: 8, 2 Labels, original TTL: 7200 sec, Signature-expiration: 02.01.2022, 05:29:56 +, Signature-Inception: 19.12.2021, 03:59:56 +, KeyTag 57564, Signer-Name: de


	DS-Query in the parent zone sends valid NSEC3 RR with the Hash "tjlb7qbojvmlf1s6gdriru7vsms1lg16" as Owner. That's the Hash of "de" with the NextHashedOwnerName "tjlfjprvcmsth243pmi98vqtj9pgi7us". So that domain name is the Closest Encloser of "viren-profi.de". Opt-Out: True. Bitmap: NS, SOA, RRSIG, DNSKEY, NSEC3PARAM Validated: RRSIG-Owner tjlb7qbojvmlf1s6gdriru7vsms1lg16.de., Algorithm: 8, 2 Labels, original TTL: 7200 sec, Signature-expiration: 02.01.2022, 04:30:10 +, Signature-Inception: 19.12.2021, 03:00:10 +, KeyTag 57564, Signer-Name: de


	0 DNSKEY RR found




Zone: home.viren-profi.de
home.viren-profi.de	0 DS RR in the parent zone found


	0 DNSKEY RR found

3. Name Servers

Domain	Nameserver	NS-IP
www.jitsi.viren-profi.de	• ns5.kasserver.com
viren-profi.de	• ns5.kasserver.com / ns64	85.13.128.3 Neusalza-Spremberg/Saxony/Germany (DE) - Neue Medien Muennich	•
	• ns6.kasserver.com / ns65	85.13.159.101 Neusalza-Spremberg/Saxony/Germany (DE) - Neue Medien Muennich	•
de	• a.nic.de
	• f.nic.de
	• l.de.net
	• n.de.net
	• s.de.net
	• z.nic.de

home.viren-profi.de	• dyndns1.kasserver.com / dyndns1	85.13.130.55 Neusalza-Spremberg/Saxony/Germany (DE) - Neue Medien Muennich	•
	• dyndns2.kasserver.com / dyndns2	85.13.135.60 Neusalza-Spremberg/Saxony/Germany (DE) - Neue Medien Muennich	•
viren-profi.de	• ns5.kasserver.com / ns65	85.13.128.3 Neusalza-Spremberg/Saxony/Germany (DE) - Neue Medien Muennich	•
	• ns6.kasserver.com / ns62	85.13.159.101 Neusalza-Spremberg/Saxony/Germany (DE) - Neue Medien Muennich	•
de	• a.nic.de
	• f.nic.de
	• l.de.net
	• n.de.net
	• s.de.net
	• z.nic.de

4. SOA-Entries

Domain:	de
Zone-Name:
Primary:
Mail:
Serial:
Refresh:
Retry:
Expire:
TTL:
num Entries:	6

Domain:	viren-profi.de
Zone-Name:	viren-profi.de
Primary:	ns5.kasserver.com
Mail:	hostmaster.kasserver.com
Serial:	2112241021
Refresh:	28800
Retry:	7200
Expire:	1209600
TTL:	7200
num Entries:	2

Domain:	www.jitsi.viren-profi.de
Zone-Name:
Primary:
Mail:
Serial:
Refresh:
Retry:
Expire:
TTL:
num Entries:	1


Domain:	de
Zone-Name:
Primary:
Mail:
Serial:
Refresh:
Retry:
Expire:
TTL:
num Entries:	6

Domain:	viren-profi.de
Zone-Name:	viren-profi.de
Primary:	ns5.kasserver.com
Mail:	hostmaster.kasserver.com
Serial:	2112241021
Refresh:	28800
Retry:	7200
Expire:	1209600
TTL:	7200
num Entries:	2

Domain:	home.viren-profi.de
Zone-Name:	home.viren-profi.de
Primary:	dyndns1.kasserver.com
Mail:	hostmaster.kasserver.com
Serial:	2112082112
Refresh:	28800
Retry:	7200
Expire:	604800
TTL:	60
num Entries:	2

5. Screenshots

Startaddress: https://jitsi.viren-profi.de, address used: https://jitsi.viren-profi.de/, Screenshot created 2021-12-24 12:26:27 +00:0

Mobil (412px x 732px)

1036 milliseconds

Screenshot mobile - https://jitsi.viren-profi.de/

Mobil + Landscape (732px x 412px)

808 milliseconds

Screenshot mobile landscape - https://jitsi.viren-profi.de/

Screen (1280px x 1680px)

1815 milliseconds

Screenshot Desktop - https://jitsi.viren-profi.de/

Mobile- and other Chrome-Checks

	width	height
visual Viewport	412	732
content Size	412	732

Good: No horizontal scrollbar. Content-size width = visual Viewport width.

Chrome-Connection: secure. secure connection settings. The connection to this site is encrypted and authenticated using TLS 1.3, X25519, and AES_128_GCM.

Chrome-Resources : secure. all served securely. All resources on this page are served securely.

6. Url-Checks

show header:

Domainname	Http-Status	redirect	Sec.	G
• http://jitsi.viren-profi.de/ 79.201.60.121	301	https://jitsi.viren-profi.de/ Html is minified: 108.54 %	0.054	A
Server: nginx/1.18.0 (Ubuntu)
Date: Fri, 24 Dec 2021 11:25:53 GMT
Content-Type: text/html
Content-Length: 178
Connection: close
Location: https://jitsi.viren-profi.de/

• https://jitsi.viren-profi.de/ 79.201.60.121 Inline-JavaScript (∑/total): 8/68148 Inline-CSS (∑/total): 0/0	200	Html is minified: 4128.82 % Other inline scripts (∑/total): 5/68148	2.514	A
small visible content (num chars: 76) JavaScript is disabled. For this site to work you have to enable JavaScript.
Server: nginx/1.18.0 (Ubuntu)
Date: Fri, 24 Dec 2021 11:25:54 GMT
Content-Type: text/html
Transfer-Encoding: chunked
Connection: close
Vary: Accept-Encoding
Strict-Transport-Security: max-age=63072000
Content-Encoding: gzip

• http://jitsi.viren-profi.de/.well-known/acme-challenge/check-your-website-dot-server-daten-dot-de 79.201.60.121 Inline-JavaScript (∑/total): 0/0 Inline-CSS (∑/total): 0/0	404	Html is minified: 109.46 % Other inline scripts (∑/total): 0/0	0.064	A
Not Found
Visible Content: 404 Not Found nginx/1.18.0 (Ubuntu)
Server: nginx/1.18.0 (Ubuntu)
Date: Fri, 24 Dec 2021 11:25:57 GMT
Content-Type: text/html
Transfer-Encoding: chunked
Connection: close
Content-Encoding: gzip

• https://79.201.60.121/ 79.201.60.121 Inline-JavaScript (∑/total): 8/68148 Inline-CSS (∑/total): 0/0	200	Html is minified: 4128.82 % Other inline scripts (∑/total): 5/68148	2.323	N
Certificate error: RemoteCertificateNameMismatch
small visible content (num chars: 76) JavaScript is disabled. For this site to work you have to enable JavaScript.
Server: nginx/1.18.0 (Ubuntu)
Date: Fri, 24 Dec 2021 11:25:58 GMT
Content-Type: text/html
Transfer-Encoding: chunked
Connection: close
Vary: Accept-Encoding
Strict-Transport-Security: max-age=63072000
Content-Encoding: gzip

7. Comments

	1. General Results, most used to calculate the result
A	name "jitsi.viren-profi.de" is subdomain, public suffix is ".de", top-level-domain is ".de", top-level-domain-type is "country-code", Country is Germany, tld-manager is "DENIC eG", num .de-domains preloaded: 7190 (complete: 168171)
A	Good: All ip addresses are public addresses
	Warning: Only one ip address found: jitsi.viren-profi.de 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: jitsi.viren-profi.de 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: destination is https
A	Good - only one version with Http-Status 200
A	Good: one preferred version: non-www is preferred
A	Good: No cookie sent via http.
A	Good: every https has a Strict Transport Security Header
A	Good: HSTS max-age is long enough, 63072000 seconds = 730 days
	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 (3 urls)
	https://jitsi.viren-profi.de/ 79.201.60.121			Url with incomplete Content-Type - header - missing charset
	http://jitsi.viren-profi.de/.well-known/acme-challenge/check-your-website-dot-server-daten-dot-de 79.201.60.121			Url with incomplete Content-Type - header - missing charset
	https://79.201.60.121/ 79.201.60.121			Url with incomplete Content-Type - header - missing charset
A	http://jitsi.viren-profi.de/ 79.201.60.121	301	https://jitsi.viren-profi.de/	Correct redirect http - https with the same domain name
N	https://79.201.60.121/ 79.201.60.121	200		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 jitsi.viren-profi.de, 1 ip addresses, 1 different http results.
	2. Header-Checks
	3. DNS- and NameServer - Checks
A	Info:: 9 Root-climbing DNS Queries required to find all IPv4- and IPv6-Addresses of 2 Name Servers.
A	Info:: 9 Queries complete, 9 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.ns5.kasserver.com (85.13.128.3), ns6.kasserver.com (85.13.159.101)
	Ok (4 - 8):: An average of 4.5 queries per domain name server required to find all ip addresses of all name servers.
A	Info:: 2 different Name Servers found: ns5.kasserver.com, ns6.kasserver.com, 2 Name Servers included in Delegation: ns5.kasserver.com, ns6.kasserver.com, 2 Name Servers included in 1 Zone definitions: ns5.kasserver.com, ns6.kasserver.com, 1 Name Servers listed in SOA.Primary: ns5.kasserver.com.
A	Good: Only one SOA.Primary Name Server found.: ns5.kasserver.com.
A	Good: SOA.Primary Name Server included in the delegation set.: ns5.kasserver.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	Info: Ipv4-Subnet-list: 2 Name Servers, 1 different subnets (first Byte): 85., 1 different subnets (first two Bytes): 85.13., 2 different subnets (first three Bytes): 85.13.128., 85.13.159.
A	Good: Name Server IPv4-addresses from different subnet 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
A	Good: Nameserver has passed 10 EDNS-Checks (OP100, FLAGS, V1, V1OP100, V1FLAGS, DNSSEC, V1DNSSEC, NSID, COOKIE, CLIENTSUBNET): 4 good Nameserver
	Nameserver doesn't pass all EDNS-Checks: a.nic.de: 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: a.nic.de: 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: f.nic.de: 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: f.nic.de: 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: l.de.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: l.de.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: n.de.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: n.de.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: ns5.kasserver.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: s.de.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: s.de.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: z.nic.de: 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: z.nic.de: 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://jitsi.viren-profi.de/ 79.201.60.121	200		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://79.201.60.121/ 79.201.60.121	200		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://jitsi.viren-profi.de/ 79.201.60.121	200		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.
	https://79.201.60.121/ 79.201.60.121	200		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.
	https://jitsi.viren-profi.de/ 79.201.60.121	200		Warning: Https connections (Standard Port 443) found without support of the http/2 protocol via ALPN. Http/2 is the new Http-Version (old: http 1.1) with some important new features. Update your server software so http/2 is available. Only one TCP-connection per Server (that's a performance boost), Header-Compression and Server Pushs are available. Domain Sharding and Inline-CSS/Javascript shouldn't used with http/2.
	https://79.201.60.121/ 79.201.60.121	200		Warning: Https connections (Standard Port 443) found without support of the http/2 protocol via ALPN. Http/2 is the new Http-Version (old: http 1.1) with some important new features. Update your server software so http/2 is available. Only one TCP-connection per Server (that's a performance boost), Header-Compression and Server Pushs are available. Domain Sharding and Inline-CSS/Javascript shouldn't used with http/2.
	https://jitsi.viren-profi.de/ 79.201.60.121	200		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.: 3 script elements without defer/async.
	https://79.201.60.121/ 79.201.60.121	200		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.: 3 script elements without defer/async.
A	Good: All CSS / JavaScript files are sent compressed (gzip, deflate, br checked). That reduces the content of the files. 4 external CSS / JavaScript files found
	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), 4 with Cache-Control long enough, 8 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: 79653 milliseconds, 79.653 seconds

8. Connections

Domain

Port

Cert.

Protocol

KeyExchange

Strength

Cipher

Strength

HashAlgorithm

OCSP stapling

Domain/KeyExchange

IP/Strength

Port/Cipher

Cert./Strength

Protocol/HashAlgorithm

OCSP stapling

jitsi.viren-profi.de

79.201.60.121

443

Tls12

ECDH Ephermal

255

Aes256

256

Sha384

error checking OCSP stapling

jitsi.viren-profi.de

79.201.60.121

443

Tls12

ECDH Ephermal

255

Aes256

256

Sha384

error checking OCSP stapling

no http/2 via ALPN
No SNI required - domain included in main certificate

Tls.1.2
no Tls.1.1
no Tls.1.0

no http/2 via ALPN
No SNI required - domain included in main certificate

Tls.1.2
no Tls.1.1
no Tls.1.0

79.201.60.121

443

name does not match

Tls12

ECDH Ephermal

255

Aes256

256

Sha384

error checking OCSP stapling

79.201.60.121

443

name does not match

Tls12

ECDH Ephermal

255

Aes256

256

Sha384

error checking OCSP stapling

no http/2 via ALPN
Cert sent without SNI

Tls.1.2
no Tls.1.1
no Tls.1.0

no http/2 via ALPN
Cert sent without SNI

Tls.1.2
no Tls.1.1
no Tls.1.0

9. Certificates

CN=jitsi.viren-profi.de

24.12.2021

24.03.2022
1147 days expired

jitsi.viren-profi.de - 1 entry

CN=jitsi.viren-profi.de

24.12.2021

24.03.2022
1147 days expired

jitsi.viren-profi.de - 1 entry

Keyalgorithm	RSA encryption (2048 bit)
Signatur:	SHA256 With RSA-Encryption
Serial Number:	03610ED44B615FD30B441C7DA078EE9C2B75
Thumbprint:	3B96FE42FB926A57BB760C64EF6415316859D815
SHA256 / Certificate:	ZRv3xBAStWBg1btfSIA1CSaAoW2Bi0uYpfvmoXLQhR4=
SHA256 hex / Cert (DANE * 0 1):	e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855
SHA256 hex / PublicKey (DANE * 1 1):	cae8883a0557514626049068d561248a4023010ed67e76f5f942ae3c37454be8
SHA256 hex / Subject Public Key Information (SPKI):	cae8883a0557514626049068d561248a4023010ed67e76f5f942ae3c37454be8 (is buggy, ignore the result)
SPKI checked via https://v1.pwnedkeys.com/spki-hash:	Check unknown. No result 404 / 200
OCSP - Url:	http://r3.o.lencr.org
OCSP - must staple:	no
Certificate Transparency:	yes
Enhanced Key Usage:	Serverauthentifizierung (1.3.6.1.5.5.7.3.1), Clientauthentifizierung (1.3.6.1.5.5.7.3.2)

CN=R3, O=Let's Encrypt, C=US

04.09.2020

15.09.2025
expires in 124 days

CN=R3, O=Let's Encrypt, C=US

04.09.2020

15.09.2025
expires in 124 days

Keyalgorithm	RSA encryption (2048 bit)
Signatur:	SHA256 With RSA-Encryption
Serial Number:	00912B084ACF0C18A753F6D62E25A75F5A
Thumbprint:	A053375BFE84E8B748782C7CEE15827A6AF5A405
SHA256 / Certificate:	Z63RFmsCCuYbj1/JaBPATCqliZYHloZVcqPH5zdhPf0=
SHA256 hex / Cert (DANE * 0 1):	e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855
SHA256 hex / PublicKey (DANE * 1 1):	8d02536c887482bc34ff54e41d2ba659bf85b341a0a20afadb5813dcfbcf286d
SHA256 hex / Subject Public Key Information (SPKI):	8d02536c887482bc34ff54e41d2ba659bf85b341a0a20afadb5813dcfbcf286d
SPKI checked via https://v1.pwnedkeys.com/spki-hash:	Check unknown. No result 404 / 200
OCSP - Url:
OCSP - must staple:	no
Certificate Transparency:	no
Enhanced Key Usage:	Clientauthentifizierung (1.3.6.1.5.5.7.3.2), Serverauthentifizierung (1.3.6.1.5.5.7.3.1)

CN=ISRG Root X1, O=Internet Security Research Group, C=US

04.06.2015

04.06.2035
expires in 3673 days

CN=ISRG Root X1, O=Internet Security Research Group, C=US

04.06.2015

04.06.2035
expires in 3673 days

Keyalgorithm	RSA encryption (4096 bit)
Signatur:	SHA256 With RSA-Encryption
Serial Number:	008210CFB0D240E3594463E0BB63828B00
Thumbprint:	CABD2A79A1076A31F21D253635CB039D4329A5E8
SHA256 / Certificate:	lrzsBiZJdvN0YHeazyjFp8/oo8Cq4RqP/O4FwL3fCMY=
SHA256 hex / Cert (DANE * 0 1):	96bcec06264976f37460779acf28c5a7cfe8a3c0aae11a8ffcee05c0bddf08c6
SHA256 hex / PublicKey (DANE * 1 1):	0b9fa5a59eed715c26c1020c711b4f6ec42d58b0015e14337a39dad301c5afc3
SHA256 hex / Subject Public Key Information (SPKI):	0b9fa5a59eed715c26c1020c711b4f6ec42d58b0015e14337a39dad301c5afc3
SPKI checked via https://v1.pwnedkeys.com/spki-hash:	Good: Key isn't compromised
OCSP - Url:
OCSP - must staple:	no
Certificate Transparency:	no
Enhanced Key Usage:

10. Last Certificates - Certificate Transparency Log Check

1. Source CertSpotter - active certificates (one check per day)

No CertSpotter - CT-Log entries found

2. Source crt.sh - old and new certificates, sometimes very slow - only certificates with "not after" > of the last months are listed

No CRT - CT-Log entries found

11. Html-Content - Entries

Summary

							Subresource Integrity (SRI)
Domainname	HtmlElement	rel/property	∑	∑ size	∑ problems	∑ int.	∑ ext.	∑ Origin poss.	∑ SRI ParseErrors	∑ SRI valid	∑ SRI missing
https://jitsi.viren-profi.de/ 79.201.60.121	link	stylesheet	1		0	1	0	0	0	0
	link	other	3	17,146 Bytes	0	2	0	0	0	0
	meta	og	3	3,376 Bytes	0	1	0	0	0	0
	meta	other	8		0			0	0	0
	script		3		0	3	0	0	0	0
https://79.201.60.121/ 79.201.60.121	link	stylesheet	1		0			0	0	0
	link	other	3		0			0	0	0
	meta	og	3		0			0	0	0
	meta	other	8		0			0	0	0
	script		3		0			0	0	0

Details (currently limited to 500 rows - some problems with spam users)

Domainname

Html-Element

name/equiv/ property/rel

href/src/content

HttpStatus

msg

∑

Status

https://jitsi.viren-profi.de/
79.201.60.121

link

apple-touch-icon

images/apple-touch-icon.png

200

image/png
missing X-Content-Type-Options nosniff

No Cache-Control header

No Compression - 17146 Bytes

link

icon

images/favicon.ico?v=1

200

image/x-icon
missing X-Content-Type-Options nosniff

Cache-Control: max-age=31536000 with long duration found.

No Compression - 941 Bytes

link

manifest

link

stylesheet

css/all.css?v=5675

200

text/css
missing X-Content-Type-Options nosniff

Cache-Control: max-age=31536000 - with long duration found.

Compression required: 35817 Bytes

local SRI possible, possible hash-values:

sha256-Ln9peu5thtNvZIz9xLEPIfenBuwM3BVG7UBAMMTdO5s=
sha384-GI5mpwhAu0bNQUG9SIVkyif1pZnrVbX1Ap+3lcs4pkHgdHDuY6/8HnoSwh5y8wOh
sha512-cEoiwUqts48/Frj03Q75rZxAwd5JT9UUzSWlO51bTYv9eFOVZKi6lscPQT9t6yaMLYP7+XlWaZoFq/WcLXnWAg==

Content loaded via url("...")

../images/chromeLogo.svg

../images/deep-linking-image.png

../images/flags.png

../images/flags@2x.png

../images/welcome-background.png

meta

charset

utf-8

meta

images/jitsilogo.png?v=1

meta

Jitsi Meet

meta

Join a WebRTC video conference powered by the Jitsi Videobridge

meta

og:description

Join a WebRTC video conference powered by the Jitsi Videobridge

meta

og:image

images/jitsilogo.png?v=1

200

image/png
missing X-Content-Type-Options nosniff

Cache-Control: max-age=31536000 with long duration found.

No Compression - 3376 Bytes

meta

og:title

Jitsi Meet

meta

content-type

text/html;charset=utf-8

meta

theme-color

#2A3A4B

meta

viewport

width=device-width, initial-scale=1.0, maximum-scale=1.0

script

src

libs/app.bundle.min.js?v=5675

200

Missing defer / async attribute.

application/javascript
missing X-Content-Type-Options nosniff

Cache-Control: max-age=31536000 - with long duration found.

Compression required: 1336004 Bytes

local SRI possible, possible hash-values:

sha256-xODgubno04Jz49HkR3+I/OFi0cbFjUdqph0mU1H0ly8=
sha384-l8q8sGCGJ1qz4xMzLqYr1XDTsC4qwQPODq2DDkGOTOX/mzaA1N8xPmOqbg8CjRmp
sha512-7geykRT3+yoa/HF99r01El9qUYxWSVrPIYSMdOF6+rCb0/OLxwjTF/MPjDyzUTooLIey6Efrf2g3NSdFXVssZg==

script

src

libs/do_external_connect.min.js?v=1

200

Missing defer / async attribute.

application/javascript
missing X-Content-Type-Options nosniff

Cache-Control: max-age=31536000 - with long duration found.

Compression required: 1739 Bytes

local SRI possible, possible hash-values:

sha256-4coIsggO7N9zz5xYZUa0CJ9932Fij/Xz8eQequJFYjM=
sha384-eYkgGVD6W7cYWkfYkubzfd7h8oHm1+ZVjDWOXOWXpArtkDE4Q0IT2r9mr2gkPWk9
sha512-xsAeWAxCs8x0iPQLydigdIHPCKiGE0plkmBgkcQoQUB69u/2N7Q199eQMCQIC2z9e6Jk9wQao2C3YCQ7dJ51Og==

script

src

libs/lib-jitsi-meet.min.js?v=5675

200

Missing defer / async attribute.

application/javascript
missing X-Content-Type-Options nosniff

Cache-Control: max-age=31536000 - with long duration found.

Compression required: 229238 Bytes

local SRI possible, possible hash-values:

sha256-y3AA0x4uyglpBhK0lm6ns+BMAN/qqWvnOI1xR/1juCE=
sha384-zZxSZwDur81zzQSNVh0aNdpo7RC1cN0IwdCYqajla0QGhHec4lfhao2HWCGTu2bb
sha512-Me2+Qk0BZ4YkQIL7fXhqS0n4AUR7Eh8zZGpx+nY7UAcAqtfrZml6XYEK8T9wCpfTIGkqwoR+plsNWCfrdpuKgQ==

https://79.201.60.121/
79.201.60.121

link

apple-touch-icon

images/apple-touch-icon.png

link

icon

images/favicon.ico?v=1

link

manifest

link

stylesheet

css/all.css?v=5675

meta

charset

utf-8

meta

images/jitsilogo.png?v=1

meta

Jitsi Meet

meta

Join a WebRTC video conference powered by the Jitsi Videobridge

meta

og:description

Join a WebRTC video conference powered by the Jitsi Videobridge

meta

og:image

images/jitsilogo.png?v=1

meta

og:title

Jitsi Meet

meta

content-type

text/html;charset=utf-8

meta

theme-color

#2A3A4B

meta

viewport

width=device-width, initial-scale=1.0, maximum-scale=1.0

script

src

libs/app.bundle.min.js?v=5675

Missing defer / async attribute.

script

src

libs/do_external_connect.min.js?v=1

Missing defer / async attribute.

script

src

libs/lib-jitsi-meet.min.js?v=5675

Missing defer / async attribute.

12. Html-Parsing via https://validator.w3.org/nu/

Small Code update, wait one minute

13. Nameserver - IP-Adresses

Required Root-climbing DNS-Queries to find ip addresses of all Name Servers: ns5.kasserver.com, ns6.kasserver.com

QNr.	Domain	Type	NS used
1	com	NS	e.root-servers.net (2001:500:a8::e)
	Answer: 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
2	ns5.kasserver.com: 85.13.128.3	NS	a.gtld-servers.net (2001:503:a83e::2:30)
	Answer: ns6.kasserver.com 85.13.159.101
	Answer: ns7.kasserver.com 70.84.168.162
3	de	NS	b.root-servers.net (2001:500:200::b)
	Answer: a.nic.de, f.nic.de, l.de.net, n.de.net, s.de.net, z.nic.de
4	ns1.kas-dns-service.de	NS	a.nic.de (2001:678:2::53)
	Answer: f.nic.de
5	ns14.kas-dns-service.de	NS	a.nic.de (2001:678:2::53)
	Answer: f.nic.de
6	ns1.kas-dns-service.de: 164.68.122.186	A	f.nic.de (2a02:568:0:2::53)
7	ns1.kas-dns-service.de: No AAAA record found	AAAA	f.nic.de (2a02:568:0:2::53)
8	ns14.kas-dns-service.de: 85.13.158.127	A	f.nic.de (2a02:568:0:2::53)
9	ns14.kas-dns-service.de: No AAAA record found	AAAA	f.nic.de (2a02:568:0:2::53)

14. CAA - Entries

Domainname	flag	Value	∑ Queries
jitsi.viren-profi.de			1
home.viren-profi.de	0	no CAA entry found	1
viren-profi.de	0	no CAA entry found	1
	0	no CAA entry found	1
de	0	no CAA entry found	1
	0	no CAA entry found	1

15. TXT - Entries

Domainname	Status	∑ Queries
viren-profi.de	ok	1
jitsi.viren-profi.de		1
_acme-challenge.home.viren-profi.de	missing entry or wrong length	1
_acme-challenge.jitsi.viren-profi.de	Name Error - The domain name does not exist	1
_acme-challenge.jitsi.viren-profi.de.viren-profi.de	perhaps wrong	1
_acme-challenge.home.viren-profi.de.home.viren-profi.de	perhaps wrong	1
_acme-challenge.jitsi.viren-profi.de.jitsi.viren-profi.de	Name Error - The domain name does not exist	1

16. DomainService - Entries

No DomainServiceEntries entries found

17. Cipher Suites

No Ciphers found

18. Portchecks

No open Ports <> 80 / 443 found, so no additional Ports checked.

Permalink: https://check-your-website.server-daten.de/?i=71150aeb-8f3a-4ad7-aa18-79ad133ee6b8

Last Result: https://check-your-website.server-daten.de/?q=jitsi.viren-profi.de - 2021-12-24 12:25:20

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Check DNS, Urls + Redirects, Certificates and Content of your Website

Older results

1. IP-Addresses

2. DNSSEC

3. Name Servers

4. SOA-Entries

5. Screenshots

Mobile- and other Chrome-Checks

6. Url-Checks

7. Comments

1. General Results, most used to calculate the result

2. Header-Checks

3. DNS- and NameServer - Checks

4. Content- and Performance-critical Checks

8. Connections

9. Certificates

10. Last Certificates - Certificate Transparency Log Check

1. Source CertSpotter - active certificates (one check per day)

2. Source crt.sh - old and new certificates, sometimes very slow - only certificates with "not after" > of the last months are listed

11. Html-Content - Entries

Summary

Details (currently limited to 500 rows - some problems with spam users)

12. Html-Parsing via https://validator.w3.org/nu/

13. Nameserver - IP-Adresses

14. CAA - Entries

15. TXT - Entries

16. DomainService - Entries

17. Cipher Suites

18. Portchecks