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Connect failure - perhaps firewall

Checked:
31.07.2025 22:02:43

Older results

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1. IP-Addresses

Host	Type	IP-Address	is auth.	∑ Queries	∑ Timeout
authdesk.duckdns.org			yes	5	5
www.authdesk.duckdns.org			yes	5	4
authdesk.duckdns.org	A	74.215.63.37 Cincinnati/Ohio/United States (US) - Fuse Internet Access No Hostname found	no
www.authdesk.duckdns.org	A	74.215.63.37 Cincinnati/Ohio/United States (US) - Fuse Internet Access No Hostname found	no

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


	4 DNSKEY RR found


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


	Public Key with Algorithm 8, KeyTag 38696, Flags 257 (SEP = Secure Entry Point)


	Public Key with Algorithm 8, KeyTag 46441, Flags 256


	Public Key with Algorithm 8, KeyTag 53148, Flags 256


	1 RRSIG RR to validate DNSKEY RR found


	RRSIG-Owner (root), Algorithm: 8, 0 Labels, original TTL: 172800 sec, Signature-expiration: 21.08.2025, 00:00:00 +, Signature-Inception: 31.07.2025, 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: org
org	1 DS RR in the parent zone found


	DS with Algorithm 8, KeyTag 26974, DigestType 2 and Digest T+3ilMU/Q4oVjEHTlInNeKhr6w2KCur/FHRcDRbh3jI=


	1 RRSIG RR to validate DS RR found


	RRSIG-Owner org., Algorithm: 8, 1 Labels, original TTL: 86400 sec, Signature-expiration: 13.08.2025, 17:00:00 +, Signature-Inception: 31.07.2025, 16:00:00 +, KeyTag 46441, Signer-Name: (root)


	• Status: Good - Algorithmus 8 and DNSKEY with KeyTag 46441 used to validate the DS RRSet in the parent zone


	3 DNSKEY RR found


	Public Key with Algorithm 8, KeyTag 8958, Flags 256


	Public Key with Algorithm 8, KeyTag 26974, Flags 257 (SEP = Secure Entry Point)


	Public Key with Algorithm 8, KeyTag 55098, Flags 256


	1 RRSIG RR to validate DNSKEY RR found


	RRSIG-Owner org., Algorithm: 8, 1 Labels, original TTL: 3600 sec, Signature-expiration: 15.08.2025, 15:31:55 +, Signature-Inception: 25.07.2025, 14:31:55 +, KeyTag 26974, Signer-Name: org


	• Status: Good - Algorithmus 8 and DNSKEY with KeyTag 26974 used to validate the DNSKEY RRSet


	• Status: Valid Chain of trust. Parent-DS with Algorithm 8, KeyTag 26974, DigestType 2 and Digest "T+3ilMU/Q4oVjEHTlInNeKhr6w2KCur/FHRcDRbh3jI=" validates local Key with the same values, Key ist Secure Entry Point (SEP) of the zone

Zone: duckdns.org
duckdns.org	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 "6fabb6hcuj19tgg44lr37hr00rdj3gvl" between the hashed NSEC3-owner "6faatej6fp6286co1nsqe7oal2qlhff1" and the hashed NextOwner "6faciefkg2ht5kqoau0aehb48j0qfej7". So the parent zone confirmes the not-existence of a DS RR. Bitmap: NS, DS, RRSIG Validated: RRSIG-Owner 6faatej6fp6286co1nsqe7oal2qlhff1.org., Algorithm: 8, 2 Labels, original TTL: 3600 sec, Signature-expiration: 15.08.2025, 15:31:55 +, Signature-Inception: 25.07.2025, 14:31:55 +, KeyTag 8958, Signer-Name: org


	DS-Query in the parent zone sends valid NSEC3 RR with the Hash "gdtpongmpok61u9lvnipqor8lra9l4t0" as Owner. That's the Hash of "org" with the NextHashedOwnerName "gdtrea8kmj2rneqen4m2ogj26kfsukj7". So that domain name is the Closest Encloser of "duckdns.org". Opt-Out: True. Bitmap: NS, SOA, RRSIG, DNSKEY, NSEC3PARAM Validated: RRSIG-Owner gdtpongmpok61u9lvnipqor8lra9l4t0.org., Algorithm: 8, 2 Labels, original TTL: 3600 sec, Signature-expiration: 21.08.2025, 19:58:06 +, Signature-Inception: 31.07.2025, 18:58:06 +, KeyTag 8958, Signer-Name: org


	0 DNSKEY RR found




Zone: authdesk.duckdns.org
authdesk.duckdns.org	0 DS RR in the parent zone found


	0 DNSKEY RR found




Zone: www.authdesk.duckdns.org
www.authdesk.duckdns.org	0 DS RR in the parent zone found

3. Name Servers

Domain	Nameserver	NS-IP
authdesk.duckdns.org	• ns1.duckdns.org
	• ns2.duckdns.org
	• ns3.duckdns.org
	T ns4.duckdns.org	3.97.51.116 Toronto/Ontario/Canada (CA) - Amazon Technologies Inc.
	• ns5.duckdns.org
	T ns6.duckdns.org	3.97.58.28 Toronto/Ontario/Canada (CA) - Amazon Technologies Inc.
	• ns7.duckdns.org
	• ns8.duckdns.org
	T ns9.duckdns.org
duckdns.org	• ns1.duckdns.org
	• ns2.duckdns.org
	• ns3.duckdns.org
	• ns4.duckdns.org
	• ns5.duckdns.org
	• ns6.duckdns.org
	• ns7.duckdns.org
	• ns8.duckdns.org
	• ns9.duckdns.org
org	• a0.org.afilias-nst.info / app6.nrt1.hosts.meta.redstone.afilias-nst.info-1615580861		•
	• a2.org.afilias-nst.info / FRA4		•
	• b0.org.afilias-nst.org / app4.lax1.hosts.meta.redstone.afilias-nst.info-1633102198		•
	• b2.org.afilias-nst.org / FRA3		•
	• c0.org.afilias-nst.info / app7.nrt1.hosts.meta.redstone.afilias-nst.info-1615580861		•
	• d0.org.afilias-nst.org / app30.nrt1.hosts.meta.redstone.afilias-nst.info-1615580861		•

4. SOA-Entries

Domain:	org
Zone-Name:	org
Primary:	a0.org.afilias-nst.info
Mail:	hostmaster.donuts.email
Serial:	1753991514
Refresh:	7200
Retry:	900
Expire:	1209600
TTL:	3600
num Entries:	6

Domain:	duckdns.org
Zone-Name:
Primary:
Mail:
Serial:
Refresh:
Retry:
Expire:
TTL:
num Entries:	9

Domain:	authdesk.duckdns.org
Zone-Name:
Primary:
Mail:
Serial:
Refresh:
Retry:
Expire:
TTL:
num Entries:	9

5. Screenshots

No Screenshot listed, because no url-check with https + http status 200-299, 400-599 + not-ACME-check found.

6. Url-Checks

Domainname	Http-Status	Sec.	G
• http://authdesk.duckdns.org/ 74.215.63.37	-102	1.397	V
ConnectionError (2, 0x80004005). Es konnte keine Verbindung hergestellt werden, da der Zielcomputer die Verbindung verweigerte. (74.215.63.37:80)

• http://www.authdesk.duckdns.org/ 74.215.63.37	-102	1.390	V
ConnectionError (2, 0x80004005). Es konnte keine Verbindung hergestellt werden, da der Zielcomputer die Verbindung verweigerte. (74.215.63.37:80)

• https://authdesk.duckdns.org/ 74.215.63.37	-102	1.384	V
ConnectionError (2, 0x80004005). Es konnte keine Verbindung hergestellt werden, da der Zielcomputer die Verbindung verweigerte. (74.215.63.37:443)

• https://www.authdesk.duckdns.org/ 74.215.63.37	-102	1.393	V
ConnectionError (2, 0x80004005). Es konnte keine Verbindung hergestellt werden, da der Zielcomputer die Verbindung verweigerte. (74.215.63.37:443)

• http://authdesk.duckdns.org/.well-known/acme-challenge/check-your-website-dot-server-daten-dot-de 74.215.63.37	-102	1.410	V
ConnectionError (2, 0x80004005). Es konnte keine Verbindung hergestellt werden, da der Zielcomputer die Verbindung verweigerte. (74.215.63.37:80)
Visible Content:

• http://www.authdesk.duckdns.org/.well-known/acme-challenge/check-your-website-dot-server-daten-dot-de 74.215.63.37	-102	1.394	V
ConnectionError (2, 0x80004005). Es konnte keine Verbindung hergestellt werden, da der Zielcomputer die Verbindung verweigerte. (74.215.63.37:80)
Visible Content:

• https://74.215.63.37/ 74.215.63.37	-102	1.403	V
ConnectionError (2, 0x80004005). Es konnte keine Verbindung hergestellt werden, da der Zielcomputer die Verbindung verweigerte. (74.215.63.37:443)

7. Comments

	1. General Results, most used to calculate the result
A	name "authdesk.duckdns.org" is domain, public suffix is ".duckdns.org", top-level-domain is ".org", top-level-domain-type is "generic", tld-manager is "Public Interest Registry (PIR)", num .org-domains preloaded: 10167 (complete: 271405)
A	Good: All ip addresses are public addresses
	HSTS-Preload-Status: unknown. Domain never included in the Preload-list. Check https://hstspreload.org/ to learn some basics about the Google-Preload-List.
V	http://authdesk.duckdns.org/ 74.215.63.37	-102	Connect failure - perhaps firewall
V	http://www.authdesk.duckdns.org/ 74.215.63.37	-102	Connect failure - perhaps firewall
V	https://authdesk.duckdns.org/ 74.215.63.37	-102	Connect failure - perhaps firewall
V	https://www.authdesk.duckdns.org/ 74.215.63.37	-102	Connect failure - perhaps firewall
V	http://authdesk.duckdns.org/.well-known/acme-challenge/check-your-website-dot-server-daten-dot-de 74.215.63.37	-102	Connect failure - perhaps firewall
V	http://www.authdesk.duckdns.org/.well-known/acme-challenge/check-your-website-dot-server-daten-dot-de 74.215.63.37	-102	Connect failure - perhaps firewall
V	https://74.215.63.37/ 74.215.63.37	-102	Connect failure - perhaps firewall
X	Fatal error: Nameserver doesn't support TCP connection: ns4.duckdns.org / 3.97.51.116: Timeout
X	Fatal error: Nameserver doesn't support TCP connection: ns6.duckdns.org / 3.97.58.28: Timeout
X	Fatal error: Nameserver doesn't support TCP connection: ns9.duckdns.org: Timeout
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.authdesk.duckdns.org
	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
A
A	Info:: 6 different Name Servers found: a0.org.afilias-nst.info, a2.org.afilias-nst.info, b0.org.afilias-nst.org, b2.org.afilias-nst.org, c0.org.afilias-nst.info, d0.org.afilias-nst.org, 6 Name Servers included in Delegation: a0.org.afilias-nst.info, a2.org.afilias-nst.info, b0.org.afilias-nst.org, b2.org.afilias-nst.org, c0.org.afilias-nst.info, d0.org.afilias-nst.org, 6 Name Servers included in 1 Zone definitions: a0.org.afilias-nst.info, a2.org.afilias-nst.info, b0.org.afilias-nst.org, b2.org.afilias-nst.org, c0.org.afilias-nst.info, d0.org.afilias-nst.org, 1 Name Servers listed in SOA.Primary: a0.org.afilias-nst.info.
A	Good: Only one SOA.Primary Name Server found.: a0.org.afilias-nst.info.
A	Good: SOA.Primary Name Server included in the delegation set.: a0.org.afilias-nst.info.
A	Good: All Name Server Domain Names have a Public Suffix.
A
X	Nameserver Timeout checking Echo Capitalization: ns4.duckdns.org / 3.97.51.116
X	Nameserver Timeout checking Echo Capitalization: ns6.duckdns.org / 3.97.58.28
X	Nameserver Timeout checking Echo Capitalization: ns9.duckdns.org
X	Nameserver Timeout checking EDNS512: ns4.duckdns.org / 3.97.51.116
X	Nameserver Timeout checking EDNS512: ns6.duckdns.org / 3.97.58.28
X	Nameserver Timeout checking EDNS512: ns9.duckdns.org
	Nameserver doesn't pass all EDNS-Checks: ns1.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.
	Nameserver doesn't pass all EDNS-Checks: ns1.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.
	Nameserver doesn't pass all EDNS-Checks: ns2.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.
	Nameserver doesn't pass all EDNS-Checks: ns2.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.
	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.
	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.
	Nameserver doesn't pass all EDNS-Checks: ns4.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.
	Nameserver doesn't pass all EDNS-Checks: ns4.duckdns.org / 3.97.51.116: OP100: ok. 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.
	Nameserver doesn't pass all EDNS-Checks: ns5.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.
	Nameserver doesn't pass all EDNS-Checks: ns5.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.
	Nameserver doesn't pass all EDNS-Checks: ns6.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.
	Nameserver doesn't pass all EDNS-Checks: ns6.duckdns.org / 3.97.58.28: 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.
	Nameserver doesn't pass all EDNS-Checks: ns7.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.
	Nameserver doesn't pass all EDNS-Checks: ns7.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.
	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.
	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.
	Nameserver doesn't pass all EDNS-Checks: ns9.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.
	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
	http://authdesk.duckdns.org/.well-known/acme-challenge/check-your-website-dot-server-daten-dot-de 74.215.63.37	-102	Fatal: Check of /.well-known/acme-challenge/random-filename is blocked, http connection error. 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.
	http://www.authdesk.duckdns.org/.well-known/acme-challenge/check-your-website-dot-server-daten-dot-de 74.215.63.37	-102	Fatal: Check of /.well-known/acme-challenge/random-filename is blocked, http connection error. 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: 844423 milliseconds, 844.423 seconds

8. Connections

No connection informations found. Perhaps only http - connections.

9. Certificates

No certificate informations found. Perhaps only http - connections.

10. Last Certificates - Certificate Transparency Log Check

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

Issuer				last 7 days	active	num Certs
CN=E6, O=Let's Encrypt, C=US				0	0	2

CertSpotter-Id	Issuer	not before	not after	Domain names	LE-Duplicate	next LE
11091650796 leaf cert	CN=E6, O=Let's Encrypt, C=US	2025-07-12 15:44:44	2025-10-10 15:44:43	*.authdesk.duckdns.org, authdesk.duckdns.org - 2 entries
10399850379 leaf cert	CN=E6, O=Let's Encrypt, C=US	2025-05-13 06:53:05	2025-08-11 06:53:04	*.authdesk.duckdns.org, authdesk.duckdns.org - 2 entries

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

No Html-Content entries found. Only checked if https + status 200/401/403/404

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

No https result http status 200 and Content-Type text/html or text/xml found, no Html-Parsing - Check

13. Nameserver - IP-Adresses

Required Root-climbing DNS-Queries to find ip addresses of all Name Servers:

No NameServer - IP address - Informations found

14. CAA - Entries

Domainname	flag	Value	∑ Queries	∑ Timeout
authdesk.duckdns.org			5	5
duckdns.org			5	5
org	0	no CAA entry found	1	0

15. TXT - Entries

No TXT entries found

16. DomainService - Entries

No DomainServiceEntries entries found

17. Cipher Suites

No results

18. Portchecks

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

Permalink: https://check-your-website.server-daten.de/?i=bba1bcb6-ac54-4bed-b0b6-cc2d55d75164

Last Result: https://check-your-website.server-daten.de/?q=authdesk.duckdns.org - 2025-07-31 22:02:43

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