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.





1. IP-Addresses

HostTIP-Addressis auth.∑ Queries∑ Timeout
ts4docker.nctu.me
A
192.168.169.240
No Hostname found
yes
1
0

AAAA

yes


www.ts4docker.nctu.me
A
192.168.169.240
No Hostname found
yes
1
0

AAAA

yes



2. DNSSEC

Zone (*)DNSSEC - Informations (beta)

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: me
me
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, 05:00:00, Signature-Inception: 25.03.2020, 04:00:00, 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 2569, Flags 257 (SEP = Secure Entry Point)



Public Key with Algorithm 7, KeyTag 46829, Flags 256



Public Key with Algorithm 7, KeyTag 53233, Flags 257 (SEP = Secure Entry Point)



Public Key with Algorithm 7, KeyTag 55358, Flags 256



3 RRSIG RR to validate DNSKEY RR found



Algorithm: 7, 1 Labels, original TTL: 900 sec, Signature-expiration: 07.04.2020, 15:18:20, Signature-Inception: 17.03.2020, 14:18:20, KeyTag 2569, Signer-Name: me



Algorithm: 7, 1 Labels, original TTL: 900 sec, Signature-expiration: 07.04.2020, 15:18:20, Signature-Inception: 17.03.2020, 14:18:20, KeyTag 46829, Signer-Name: me



Algorithm: 7, 1 Labels, original TTL: 900 sec, Signature-expiration: 07.04.2020, 15:18:20, Signature-Inception: 17.03.2020, 14:18:20, KeyTag 53233, Signer-Name: me



Status: Good - Algorithmus 7 and DNSKEY with KeyTag 2569 used to validate the DNSKEY RRSet



Status: Good - Algorithmus 7 and DNSKEY with KeyTag 46829 used to validate the DNSKEY RRSet



Status: Good - Algorithmus 7 and DNSKEY with KeyTag 53233 used to validate the DNSKEY RRSet



Status: Valid Chain of trust. Parent-DS with Algorithm 7, KeyTag 2569, DigestType 1 and Digest "CboetNIEAmIIgf2YSJlEF4ANsmo=" 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 2569, DigestType 2 and Digest "lOeYEG8DNQDmdWexl66RMsDpFnZNx0PFWp7KPHv1WeI=" validates local Key with the same values, Key ist Secure Entry Point (SEP) of the zone

Zone: nctu.me
nctu.me
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: ts4docker.nctu.me
ts4docker.nctu.me
0 DS RR in the parent zone found



0 DNSKEY RR found





Zone: www.ts4docker.nctu.me
www.ts4docker.nctu.me
0 DS RR in the parent zone found


3. Name Servers

DomainNameserverNS-IP
www.ts4docker.nctu.me
  ns1.dnsimple.com / 67m30

ts4docker.nctu.me
  ns1.dnsimple.com / 67m17
162.159.24.4
Chicago/Illinois/United States (US) - Cloudflare, Inc.


 
2400:cb00:2049:1::a29f:1804
Columbus/North Carolina/United States (US) - CLOUDFLARE

nctu.me
  ns1.dnsimple.com / 67m17


  ns2.dnsimple.com / 67m9


  ns3.dnsimple.com / 67m24


  ns4.dnsimple.com / 67m29

me
  a0.nic.me / ns009b.app19.nrt1.afilias-nst.info


  a2.nic.me / 2.fra.pch


  b0.nic.me / ns009b.app14.ams2.afilias-nst.info


  b2.nic.me / 4.fra.pch


  c0.nic.me / ns009b.app13.ams2.afilias-nst.info


4. SOA-Entries


Domain:me
Primary:ns.nic.me
Mail:noc.afilias-nst.info
Serial:2010898902
Refresh:3600
Retry:3600
Expire:3600000
TTL:8400
num Entries:5


Domain:nctu.me
Primary:ns1.dnsimple.com
Mail:admin.dnsimple.com
Serial:1438214593
Refresh:86400
Retry:7200
Expire:604800
TTL:300
num Entries:4


Domain:ts4docker.nctu.me
Primary:ns1.dnsimple.com
Mail:admin.dnsimple.com
Serial:1438214607
Refresh:86400
Retry:7200
Expire:604800
TTL:300
num Entries:2


Domain:www.ts4docker.nctu.me
Primary:ns1.dnsimple.com
Mail:admin.dnsimple.com
Serial:1438214619
Refresh:86400
Retry:7200
Expire:604800
TTL:300
num Entries:1


5. Screenshots (Beta)

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

6. Url-Checks

Domainname Http-StatusredirectSec.G







7. Comments

Aname "ts4docker.nctu.me" is domain, public suffix is "nctu.me", top-level-domain-type is "country-code", Country is Montenegro, tld-manager is "Government of Montenegro"
Agood: No asked Authoritative Name Server had a timeout
HSTS-Preload-Status: unknown. Domain never included in the Preload-list. Check https://hstspreload.org/ to learn some basics about the Google-Preload-List.
Yts4docker.nctu.me

192.168.169.240
Warning: Private ip address found. No connection possible. There are two types of ip addresses: Worldwide unique, global addresses and private addresses. If you want that other users connect your domain, your domain must have minimal one A- (ipv4) or AAAA- (ipv6) entry with a global ip address. Check https://en.wikipedia.org/wiki/Private_network to understand the details: 192.168.0.0 to 192.168.255.255: Class C - 256 private net, every with 256 addresses
Ywww.ts4docker.nctu.me

192.168.169.240
Warning: Private ip address found. No connection possible. There are two types of ip addresses: Worldwide unique, global addresses and private addresses. If you want that other users connect your domain, your domain must have minimal one A- (ipv4) or AAAA- (ipv6) entry with a global ip address. Check https://en.wikipedia.org/wiki/Private_network to understand the details: 192.168.0.0 to 192.168.255.255: Class C - 256 private net, every with 256 addresses
AGood: Nameserver supports TCP connections: 2 good Nameserver
AGood: Nameserver supports Echo Capitalization: 2 good Nameserver
AGood: Nameserver supports EDNS with max. 512 Byte Udp payload, message is smaller: 2 good Nameserver
AGood: Nameserver has passed 10 EDNS-Checks (OP100, FLAGS, V1, V1OP100, V1FLAGS, DNSSEC, V1DNSSEC, NSID, COOKIE, CLIENTSUBNET): 2 good Nameserver
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.
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: 24877 milliseconds, 24.877 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)

No CertSpotter - CT-Log entries found


2. Source crt.sh - old and new certificates, sometimes very slow (Update 2020-01-11: Should now work again - code updated. Old message: currently no newer certificates - read Crt.sh has stopped - Letsencrypt-forum - may work next week again - 2019-12-02 - but I must check the code).

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. CAA - Entries

DomainnameflagNameValue∑ Queries∑ Timeout
www.ts4docker.nctu.me
0

no CAA entry found
1
0
ts4docker.nctu.me
0

no CAA entry found
1
0
nctu.me
0

no CAA entry found
1
0
me
0

no CAA entry found
1
0


13. TXT - Entries

DomainnameTXT EntryStatus∑ Queries∑ Timeout
ts4docker.nctu.me

ok
1
0
www.ts4docker.nctu.me

ok
1
0
_acme-challenge.ts4docker.nctu.me

Name Error - The domain name does not exist
1
0
_acme-challenge.www.ts4docker.nctu.me

Name Error - The domain name does not exist
1
0
_acme-challenge.ts4docker.nctu.me.ts4docker.nctu.me

Name Error - The domain name does not exist
1
0
_acme-challenge.www.ts4docker.nctu.me.ts4docker.nctu.me

Name Error - The domain name does not exist
1
0
_acme-challenge.www.ts4docker.nctu.me.www.ts4docker.nctu.me

Name Error - The domain name does not exist
1
0


14. Portchecks

No Port checks



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Last Result: https://check-your-website.server-daten.de/?q=ts4docker.nctu.me - 2020-03-25 08:41:44


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