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


Info: Problems with 3.048.289 Letsencrypt certificates (378.325 accounts). They must be revoked (revocation starts 2020-03-04 20:00 UTC) - see Revoking certain certificates on March 4. Update 2020-03-07: Good news: Mass-revocation is canceled.

This tool: A check (SerialNumber) is added. Letsencrypt has published a list of critical SerialNumbers, this list is checked. See the part "9. Certificates". If there is a warning, renew that certificate and replace the current certificate.




X

DNS-problem - authoritative Nameserver refused, not defined or timeout

Checked:
26.03.2020 00:02:33


Older results

No older results found


1. IP-Addresses

HostTypeIP-Addressis auth.∑ Queries∑ Timeout
cec2.duckdns.org
A
154.48.184.106
Bollullos de la Mitacion/Andalusia/Spain (ES) - Cogent Communications
No Hostname found
yes
1
0

AAAA

yes


www.cec2.duckdns.org
A
154.48.184.106
Bollullos de la Mitacion/Andalusia/Spain (ES) - Cogent Communications
No Hostname found
yes
1
0

AAAA

yes



2. DNSSEC

Info: The Xml-split has triggered some hidden bugs. Now it looks ok.
If root or the top level zone isn't validated, it's buggy.
Both green and your domain is red -> it's your domain.

Zone (*)DNSSEC - Informations

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



Status: Valid because published



3 DNSKEY RR found



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



Public Key with Algorithm 8, KeyTag 33853, Flags 256



Public Key with Algorithm 8, KeyTag 48903, Flags 256



1 RRSIG RR to validate DNSKEY RR found



Algorithm: 8, 0 Labels, original TTL: 172800 sec, Signature-expiration: 11.04.2020, 00:00:00 +, Signature-Inception: 21.03.2020, 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
2 DS RR in the parent zone found



1 RRSIG RR to validate DS RR found



Algorithm: 8, 1 Labels, original TTL: 86400 sec, Signature-expiration: 07.04.2020, 21:00:00 +, Signature-Inception: 25.03.2020, 20:00:00 +, KeyTag 33853, Signer-Name: (root)



Status: Good - Algorithmus 8 and DNSKEY with KeyTag 33853 used to validate the DS RRSet in the parent zone



4 DNSKEY RR found



Public Key with Algorithm 7, KeyTag 9795, Flags 257 (SEP = Secure Entry Point)



Public Key with Algorithm 7, KeyTag 17883, Flags 257 (SEP = Secure Entry Point)



Public Key with Algorithm 7, KeyTag 33209, Flags 256



Public Key with Algorithm 7, KeyTag 37022, Flags 256



3 RRSIG RR to validate DNSKEY RR found



Algorithm: 7, 1 Labels, original TTL: 900 sec, Signature-expiration: 15.04.2020, 15:28:56 +, Signature-Inception: 25.03.2020, 14:28:56 +, KeyTag 9795, Signer-Name: org



Algorithm: 7, 1 Labels, original TTL: 900 sec, Signature-expiration: 15.04.2020, 15:28:56 +, Signature-Inception: 25.03.2020, 14:28:56 +, KeyTag 17883, Signer-Name: org



Algorithm: 7, 1 Labels, original TTL: 900 sec, Signature-expiration: 15.04.2020, 15:28:56 +, Signature-Inception: 25.03.2020, 14:28:56 +, KeyTag 33209, Signer-Name: org



Status: Good - Algorithmus 7 and DNSKEY with KeyTag 9795 used to validate the DNSKEY RRSet



Status: Good - Algorithmus 7 and DNSKEY with KeyTag 17883 used to validate the DNSKEY RRSet



Status: Good - Algorithmus 7 and DNSKEY with KeyTag 33209 used to validate the DNSKEY RRSet



Status: Valid Chain of trust. Parent-DS with Algorithm 7, KeyTag 9795, DigestType 1 and Digest "Nk36s9ryVMq0d7VnWxB2bdqiSYI=" validates local Key with the same values, Key ist Secure Entry Point (SEP) of the zone



Status: Valid Chain of trust. Parent-DS with Algorithm 7, KeyTag 9795, DigestType 2 and Digest "OSKzG286TqkrGet7UhIPAx/Y4F/wsDuvz5+JG/5/+OU=" 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 domain name between the hashed NSEC3-owner and the hashed NextOwner. So the parent zone confirmes the non-existence of a DS RR.Bitmap: NS, DS, RRSIG



0 DNSKEY RR found





Zone: cec2.duckdns.org
cec2.duckdns.org
0 DS RR in the parent zone found



0 DNSKEY RR found





Zone: www.cec2.duckdns.org
www.cec2.duckdns.org
0 DS RR in the parent zone found


3. Name Servers

DomainNameserverNS-IP
www.cec2.duckdns.org
U  ns1.duckdns.org


U  ns2.duckdns.org


U  ns3.duckdns.org

cec2.duckdns.org
U  ns1.duckdns.org
54.187.92.222
Portland/Oregon/United States (US) - Amazon.com, Inc.


U  ns2.duckdns.org
54.191.117.119
Portland/Oregon/United States (US) - Amazon.com, Inc.


U  ns3.duckdns.org
52.26.169.94
Portland/Oregon/United States (US) - Amazon.com, Inc.

duckdns.org
U  ns1.duckdns.org


U  ns2.duckdns.org


U  ns3.duckdns.org

org
  a0.org.afilias-nst.info / ns000b.app15.ams2.afilias-nst.info


  a2.org.afilias-nst.info / 1.fra.pch


  b0.org.afilias-nst.org / ns000b.app6.ams2.afilias-nst.info


  b2.org.afilias-nst.org / 5.fra.pch


  c0.org.afilias-nst.info / app19.iad1.hosts.meta.redstone.afilias-nst.info-2


  d0.org.afilias-nst.org / ns000b.app28.ams2.afilias-nst.info


4. SOA-Entries


Domain:org
Zone-Name:
Primary:a0.org.afilias-nst.info
Mail:noc.afilias-nst.info
Serial:2013870053
Refresh:1800
Retry:900
Expire:604800
TTL:86400
num Entries:6


Domain:duckdns.org
Zone-Name:
Primary:ns1.duckdns.org
Mail:hostmaster.duckdns.org
Serial:2019170803
Refresh:6000
Retry:120
Expire:2419200
TTL:600
num Entries:1


Domain:duckdns.org
Zone-Name:
Primary:ns2.duckdns.org
Mail:hostmaster.duckdns.org
Serial:2019170803
Refresh:6000
Retry:120
Expire:2419200
TTL:600
num Entries:1


Domain:duckdns.org
Zone-Name:
Primary:ns3.duckdns.org
Mail:hostmaster.duckdns.org
Serial:2019170803
Refresh:6000
Retry:120
Expire:2419200
TTL:600
num Entries:1


Domain:cec2.duckdns.org
Zone-Name:
Primary:ns1.duckdns.org
Mail:hostmaster.duckdns.org
Serial:2019170803
Refresh:6000
Retry:120
Expire:2419200
TTL:600
num Entries:1


Domain:cec2.duckdns.org
Zone-Name:
Primary:ns2.duckdns.org
Mail:hostmaster.duckdns.org
Serial:2019170803
Refresh:6000
Retry:120
Expire:2419200
TTL:600
num Entries:1


Domain:cec2.duckdns.org
Zone-Name:
Primary:ns3.duckdns.org
Mail:hostmaster.duckdns.org
Serial:2019170803
Refresh:6000
Retry:120
Expire:2419200
TTL:600
num Entries:1


Domain:www.cec2.duckdns.org
Zone-Name:
Primary:ns1.duckdns.org
Mail:hostmaster.duckdns.org
Serial:2019170803
Refresh:6000
Retry:120
Expire:2419200
TTL:600
num Entries:1


Domain:www.cec2.duckdns.org
Zone-Name:
Primary:ns2.duckdns.org
Mail:hostmaster.duckdns.org
Serial:2019170803
Refresh:6000
Retry:120
Expire:2419200
TTL:600
num Entries:1


Domain:www.cec2.duckdns.org
Zone-Name:
Primary:ns3.duckdns.org
Mail:hostmaster.duckdns.org
Serial:2019170803
Refresh:6000
Retry:120
Expire:2419200
TTL:600
num Entries:1


5. Screenshots

No Screenshot listed, because Chrome (used to create the Screenshot) could not load the url. Instead, there was a redirect to "chrome-error://chromewebdata/", so the content of your website isn't visible.

6. Url-Checks


:

:
DomainnameHttp-StatusredirectSec.G
• http://cec2.duckdns.org:25254/
154.48.184.106
400

Html is minified: 106.69 %
0.146
M
Bad Request
Server: nginx/1.16.1
Date: Wed, 25 Mar 2020 23:04:54 GMT
Content-Type: text/html
Content-Length: 255
Connection: close

• http://www.cec2.duckdns.org:25254/
154.48.184.106
400

Html is minified: 106.69 %
0.150
M
Bad Request
Server: nginx/1.16.1
Date: Wed, 25 Mar 2020 23:04:54 GMT
Content-Type: text/html
Content-Length: 255
Connection: close

• https://cec2.duckdns.org:25254/
154.48.184.106 GZip used - 418 / 988 - 57.69 %
Inline-JavaScript (∑/total): 0/0 Inline-CSS (∑/total): 1/541
200

Html is minified: 347.89 %
7.390
N
Certificate error: RemoteCertificateNameMismatch
small visible content (num chars: 131)
Welcome to our server The website is currently being setup under this address. For help and support, please contact: me@example.com
Server: nginx/1.16.1
Date: Wed, 25 Mar 2020 23:04:54 GMT
Content-Type: text/html
Last-Modified: Wed, 25 Mar 2020 22:02:41 GMT
Transfer-Encoding: chunked
Connection: close
ETag: W/"5e7bd501-3dc"
Content-Encoding: gzip

• https://www.cec2.duckdns.org:25254/
154.48.184.106 GZip used - 418 / 988 - 57.69 %
Inline-JavaScript (∑/total): 0/0 Inline-CSS (∑/total): 1/541
200

Html is minified: 347.89 %
4.354
B
small visible content (num chars: 131)
Welcome to our server The website is currently being setup under this address. For help and support, please contact: me@example.com
Server: nginx/1.16.1
Date: Wed, 25 Mar 2020 23:05:02 GMT
Content-Type: text/html
Last-Modified: Wed, 25 Mar 2020 22:02:41 GMT
Transfer-Encoding: chunked
Connection: close
ETag: W/"5e7bd501-3dc"
Content-Encoding: gzip

• http://cec2.duckdns.org:25254/.well-known/acme-challenge/check-your-website-dot-server-daten-dot-de
154.48.184.106
-14

10.017
T
Timeout - The operation has timed out
Visible Content:

• http://www.cec2.duckdns.org:25254/.well-known/acme-challenge/check-your-website-dot-server-daten-dot-de
154.48.184.106
-14

10.027
T
Timeout - The operation has timed out
Visible Content:

7. Comments


1. General Results, most used to calculate the result

Aname "cec2.duckdns.org" is domain, public suffix is "duckdns.org", top-level-domain-type is "generic", tld-manager is "Public Interest Registry (PIR)"
Agood: All ip addresses are public addresses
Agood: destination is https
HSTS-Preload-Status: unknown. Domain never included in the Preload-list. Check https://hstspreload.org/ to learn some basics about the Google-Preload-List.
AGood: Some urls with http status 200/404 have a complete Content-Type header (MediaType / MediaSubType + correct charset):0 complete Content-Type - header (2 urls)
https://cec2.duckdns.org:25254/ 154.48.184.106


Url with incomplete Content-Type - header - missing charset
https://www.cec2.duckdns.org:25254/ 154.48.184.106


Url with incomplete Content-Type - header - missing charset
Bhttps://cec2.duckdns.org:25254/ 154.48.184.106
200

Missing HSTS-Header
Bhttps://www.cec2.duckdns.org:25254/ 154.48.184.106
200

Missing HSTS-Header
CError - no preferred version www or non-www. Select one version as preferred version, then add a redirect https + not-preferred version to https + preferred version. Perhaps in your port 443 vHost something like "RewriteEngine on" + "RewriteCond %{SERVER_NAME} = example.com" + "ReWriteRule ^ https://www.example.com%{REQUEST_URI} [END,QSA,R=permanent]" (three rows, without the "). That should create a redirect https + example.com ⇒ https + www.example.com. Or switch both values to use the non-www version as your preferred version.
CError - more then one version with Http-Status 200. After all redirects, all users (and search engines) should see the same https url: Non-www or www, but not both with http status 200.
Mhttp://cec2.duckdns.org:25254/ 154.48.184.106
400

Misconfiguration - main pages should never send http status 400 - 499
Mhttp://www.cec2.duckdns.org:25254/ 154.48.184.106
400

Misconfiguration - main pages should never send http status 400 - 499
Nhttps://cec2.duckdns.org:25254/ 154.48.184.106
200

Error - Certificate isn't trusted, RemoteCertificateNameMismatch
XFatal error: Nameserver isn't defined or has timeout
XFatal error: Nameserver doesn't support TCP connection: ns1.duckdns.org: Fatal error - no NameServer IP-Address or connection. Details: One or more errors occurred. - Es konnte keine Verbindung hergestellt werden, da der Zielcomputer die Verbindung verweigerte 54.187.92.222:53
XFatal error: Nameserver doesn't support TCP connection: ns1.duckdns.org / 54.187.92.222: Fatal error - no NameServer IP-Address or connection. Details: One or more errors occurred. - Es konnte keine Verbindung hergestellt werden, da der Zielcomputer die Verbindung verweigerte 54.187.92.222:53
XFatal error: Nameserver doesn't support TCP connection: ns2.duckdns.org: Fatal error - no NameServer IP-Address or connection. Details: One or more errors occurred. - Es konnte keine Verbindung hergestellt werden, da der Zielcomputer die Verbindung verweigerte 54.191.117.119:53
XFatal error: Nameserver doesn't support TCP connection: ns2.duckdns.org / 54.191.117.119: Fatal error - no NameServer IP-Address or connection. Details: One or more errors occurred. - Es konnte keine Verbindung hergestellt werden, da der Zielcomputer die Verbindung verweigerte 54.191.117.119:53
XFatal error: Nameserver doesn't support TCP connection: ns3.duckdns.org: Fatal error - no NameServer IP-Address or connection. Details: One or more errors occurred. - Es konnte keine Verbindung hergestellt werden, da der Zielcomputer die Verbindung verweigerte 52.26.169.94:53
XFatal error: Nameserver doesn't support TCP connection: ns3.duckdns.org / 52.26.169.94: Fatal error - no NameServer IP-Address or connection. Details: One or more errors occurred. - Es konnte keine Verbindung hergestellt werden, da der Zielcomputer die Verbindung verweigerte 52.26.169.94:53

2. DNS- and NameServer - Checks

AGood: Consistency 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. Ordered list of name servers: ns1.duckdns.org,ns2.duckdns.org,ns3.duckdns.org
AGood: Nameserver supports Echo Capitalization: 3 good Nameserver
AGood: Nameserver supports EDNS with max. 512 Byte Udp payload, message is smaller: 3 good Nameserver
Nameserver doesn't pass all EDNS-Checks: ns1.duckdns.org: 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. COOKIE: ok. CLIENTSUBNET: ok.
Nameserver doesn't pass all EDNS-Checks: ns1.duckdns.org: 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. COOKIE: ok. CLIENTSUBNET: ok.
Nameserver doesn't pass all EDNS-Checks: ns1.duckdns.org / 54.187.92.222: 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. COOKIE: ok. CLIENTSUBNET: ok.
Nameserver doesn't pass all EDNS-Checks: ns2.duckdns.org: 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. COOKIE: ok. CLIENTSUBNET: ok.
Nameserver doesn't pass all EDNS-Checks: ns2.duckdns.org: 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. COOKIE: ok. CLIENTSUBNET: ok.
Nameserver doesn't pass all EDNS-Checks: ns2.duckdns.org / 54.191.117.119: 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. COOKIE: ok. CLIENTSUBNET: ok.
Nameserver doesn't pass all EDNS-Checks: ns3.duckdns.org: 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. COOKIE: ok. CLIENTSUBNET: ok.
Nameserver doesn't pass all EDNS-Checks: ns3.duckdns.org: 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. COOKIE: ok. CLIENTSUBNET: ok.
Nameserver doesn't pass all EDNS-Checks: ns3.duckdns.org / 52.26.169.94: 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. COOKIE: ok. CLIENTSUBNET: ok.
AGood: All SOA have the same Serial Number
Warning: No CAA entry with issue/issuewild found, every CAA can create a certificate. Read https://en.wikipedia.org/wiki/DNS_Certification_Authority_Authorization to learn some basics about the idea of CAA. Your name server must support such an entry. Not all dns providers support CAA entries.

3. Content- and Performance-critical Checks

http://cec2.duckdns.org:25254/.well-known/acme-challenge/check-your-website-dot-server-daten-dot-de 154.48.184.106
-14

Fatal: Check of /.well-known/acme-challenge/random-filename has a timeout. Creating a Letsencrypt certificate via http-01 challenge can't work. You need a running webserver (http) and an open port 80. If it's a home server + ipv4, perhaps a correct port forwarding port 80 extern ⇒ working port intern is required. Port 80 / http can redirect to another domain port 80 or port 443, but not other ports. If it's a home server, perhaps your ISP blocks port 80. Then you may use the dns-01 challenge. Trouble creating a certificate? Use https://community.letsencrypt.org/ to ask.
http://www.cec2.duckdns.org:25254/.well-known/acme-challenge/check-your-website-dot-server-daten-dot-de 154.48.184.106
-14

Fatal: Check of /.well-known/acme-challenge/random-filename has a timeout. Creating a Letsencrypt certificate via http-01 challenge can't work. You need a running webserver (http) and an open port 80. If it's a home server + ipv4, perhaps a correct port forwarding port 80 extern ⇒ working port intern is required. Port 80 / http can redirect to another domain port 80 or port 443, but not other ports. If it's a home server, perhaps your ISP blocks port 80. Then you may use the dns-01 challenge. Trouble creating a certificate? Use https://community.letsencrypt.org/ to ask.
AGood: Every https result with status 200 supports GZip.
https://cec2.duckdns.org:25254/ 154.48.184.106
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://www.cec2.duckdns.org:25254/ 154.48.184.106
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://cec2.duckdns.org:25254/ 154.48.184.106
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://www.cec2.duckdns.org:25254/ 154.48.184.106
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.
AGood: Every https connection via port 443 supports the http/2 protocol via ALPN.
AGood: All checked attribute values are enclosed in quotation marks (" or ').
AInfo: No img element found, no alt attribute checked
AGood: 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
ADuration: 369973 milliseconds, 369.973 seconds


8. Connections

DomainIPPortCert.ProtocolKeyExchangeStrengthCipherStrengthHashAlgorithmOCSP stapling
Domain/KeyExchangeIP/StrengthPort/CipherCert./StrengthProtocol/HashAlgorithmOCSP stapling
cec2.duckdns.org
154.48.184.106
25254
name does not match
Tls12
ECDH Ephermal
255
Aes256
256
Sha384
supported
ok
cec2.duckdns.org
154.48.184.106
25254
name does not match
Tls12

ECDH Ephermal
255
Aes256
256
Sha384
supported
ok
http/2 via ALPN supported 
Tls.1.2
no Tls.1.1
no Tls.1.0
http/2 via ALPN supported
Tls.1.2
no Tls.1.1
no Tls.1.0
Chain (complete)
1CN=*.cec2.duckdns.org

2CN=Let's Encrypt Authority X3, O=Let's Encrypt, C=US


www.cec2.duckdns.org
154.48.184.106
25254
ok
Tls12
ECDH Ephermal
255
Aes256
256
Sha384
supported
ok

www.cec2.duckdns.org
154.48.184.106
25254
ok
Tls12

ECDH Ephermal
255
Aes256
256
Sha384
supported
ok
http/2 via ALPN supported 
Tls.1.2
no Tls.1.1
no Tls.1.0
http/2 via ALPN supported
Tls.1.2
no Tls.1.1
no Tls.1.0
Chain (complete)
1CN=*.cec2.duckdns.org

2CN=Let's Encrypt Authority X3, O=Let's Encrypt, C=US


9. Certificates

1.
1.
CN=*.cec2.duckdns.org
25.03.2020
23.06.2020
expires in 22 days
*.cec2.duckdns.org - 1 entry
1.
1.
CN=*.cec2.duckdns.org
25.03.2020

23.06.2020
expires in 22 days
*.cec2.duckdns.org - 1 entry

KeyalgorithmRSA encryption (4096 bit)
Signatur:SHA256 With RSA-Encryption
Serial Number:03CCDA4B55FA77C4AF64E47FB48322C2E123
Thumbprint:6EFBA7123313FD4E4EAA4D657E7B11B1DFE923E6
SHA256 / Certificate:d88atTs4YQnPQatjsaxZjWPTgQNZUX3KK6xB+UspGnM=
SHA256 hex / Cert (DANE * 0 1):e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855
SHA256 hex / PublicKey (DANE * 1 1):7a51a2a8648cb47245340fe7483778d0640dfce5931209b36bce269a6a91e671
SHA256 hex / Subject Public Key Information (SPKI):05bd1c4a7cc7e3f1dcf66ee357cfbbc1ab915811e730833d51f042c273e37428
SPKI checked via https://v1.pwnedkeys.com/spki-hash:Good: Key isn't compromised
OCSP - Url:http://ocsp.int-x3.letsencrypt.org
OCSP - must staple:no
Certificate Transparency:yes


2.
CN=Let's Encrypt Authority X3, O=Let's Encrypt, C=US
17.03.2016
17.03.2021
expires in 289 days


2.
CN=Let's Encrypt Authority X3, O=Let's Encrypt, C=US
17.03.2016

17.03.2021
expires in 289 days


KeyalgorithmRSA encryption (2048 bit)
Signatur:SHA256 With RSA-Encryption
Serial Number:0A0141420000015385736A0B85ECA708
Thumbprint:E6A3B45B062D509B3382282D196EFE97D5956CCB
SHA256 / Certificate:JYR9Zo608E/dQLErawdAxWfafQJDCOtsLJb+QdneIY0=
SHA256 hex / Cert (DANE * 0 1):25847d668eb4f04fdd40b12b6b0740c567da7d024308eb6c2c96fe41d9de218d
SHA256 hex / PublicKey (DANE * 1 1):60b87575447dcba2a36b7d11ac09fb24a9db406fee12d2cc90180517616e8a18
SHA256 hex / Subject Public Key Information (SPKI):cbb93d32de628874a3ecfb92affadc97f1b795f84cc6f24221a089dee1aa25ad
SPKI checked via https://v1.pwnedkeys.com/spki-hash:Good: Key isn't compromised
OCSP - Url:http://isrg.trustid.ocsp.identrust.com
OCSP - must staple:no
Certificate Transparency:no


3.
CN=DST Root CA X3, O=Digital Signature Trust Co.
30.09.2000
30.09.2021
expires in 486 days


3.
CN=DST Root CA X3, O=Digital Signature Trust Co.
30.09.2000

30.09.2021
expires in 486 days


KeyalgorithmRSA encryption (2048 bit)
Signatur:SHA-1 with RSA Encryption
Serial Number:44AFB080D6A327BA893039862EF8406B
Thumbprint:DAC9024F54D8F6DF94935FB1732638CA6AD77C13
SHA256 / Certificate:BocmAzGnJAPZCfEF5pvPDTLhvSST/8bZIG0RvNZ3Bzk=
SHA256 hex / Cert (DANE * 0 1):0687260331a72403d909f105e69bcf0d32e1bd2493ffc6d9206d11bcd6770739
SHA256 hex / PublicKey (DANE * 1 1):563b3caf8cfef34c2335caf560a7a95906e8488462eb75ac59784830df9e5b2b
SHA256 hex / Subject Public Key Information (SPKI):29cc40db5e2de462a311cbbafaa1dc466960002335ecdf3317f2cd05c1d0bedf
SPKI checked via https://v1.pwnedkeys.com/spki-hash:Good: Key isn't compromised
OCSP - Url:
OCSP - must staple:no
Certificate Transparency:no



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" > 2019 are listed

No CRT - CT-Log entries found


11. Html-Content - Entries

Summary

Subresource Integrity (SRI)
DomainnameHtmlElementrel/property∑ size∑ problems∑ int.∑ ext.∑ Origin poss.∑ SRI ParseErrors∑ SRI valid∑ SRI missing
https://cec2.duckdns.org:25254/
154.48.184.106
a

1

0


0
0
0

https://www.cec2.duckdns.org:25254/
154.48.184.106
a

1

0


0
0
0

Details

DomainnameHtml-Elementname/equiv/ property/relhref/src/contentHttpStatusmsgStatus
https://cec2.duckdns.org:25254/
154.48.184.106
a

me@example.com


1
ok







https://www.cec2.duckdns.org:25254/
154.48.184.106
a

me@example.com


1
ok








12. Nameserver - IP-Adresses (alpha)

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

No NameServer - IP address informations found. The feature is new (2020-05-07), so recheck this domain.


13. CAA - Entries

DomainnameflagNameValue∑ Queries∑ Timeout
www.cec2.duckdns.org



1
0
cec2.duckdns.org



1
0
duckdns.org
0

no CAA entry found
1
0
org
0

no CAA entry found
1
0


14. TXT - Entries

DomainnameTXT EntryStatus∑ Queries∑ Timeout
cec2.duckdns.org
4QyZHwr2vRdv7Efbt-4eB-4oc-tpNZLXNsh2JmbUrqQ
looks good, but no _acme-challenge in domain name?
1
0
www.cec2.duckdns.org
4QyZHwr2vRdv7Efbt-4eB-4oc-tpNZLXNsh2JmbUrqQ
looks good, but no _acme-challenge in domain name?
1
0
_acme-challenge.cec2.duckdns.org
4QyZHwr2vRdv7Efbt-4eB-4oc-tpNZLXNsh2JmbUrqQ
looks good, correct length, correct characters
1
0
_acme-challenge.www.cec2.duckdns.org
4QyZHwr2vRdv7Efbt-4eB-4oc-tpNZLXNsh2JmbUrqQ
looks good, correct length, correct characters
1
0
_acme-challenge.cec2.duckdns.org.cec2.duckdns.org
4QyZHwr2vRdv7Efbt-4eB-4oc-tpNZLXNsh2JmbUrqQ
perhaps wrong
1
0
_acme-challenge.www.cec2.duckdns.org.cec2.duckdns.org
4QyZHwr2vRdv7Efbt-4eB-4oc-tpNZLXNsh2JmbUrqQ
perhaps wrong
1
0
_acme-challenge.www.cec2.duckdns.org.www.cec2.duckdns.org
4QyZHwr2vRdv7Efbt-4eB-4oc-tpNZLXNsh2JmbUrqQ
perhaps wrong
1
0


15. Portchecks

No Port checks



Permalink: https://check-your-website.server-daten.de/?i=f39337a0-d6f6-4410-8e79-dcbd5ea28ff6


Last Result: https://check-your-website.server-daten.de/?q=cec2.duckdns.org%3a25254 - 2020-03-26 00:09:22


Do you like this page? Support this tool, add a link on your page:

<a href="https://check-your-website.server-daten.de/?q=cec2.duckdns.org%3a25254" target="_blank">Check this Site: cec2.duckdns.org:25254</a>