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



X

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

Checked:
22.09.2022 21:13:46


Older results


1. IP-Addresses

HostTypeIP-Addressis auth.∑ Queries∑ Timeout
3doptimizer.com

Refused
yes
1
0
www.3doptimizer.com

Refused
yes
1
0


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 18733, Flags 256



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



Public Key with Algorithm 8, KeyTag 20826, Flags 256



1 RRSIG RR to validate DNSKEY RR found



RRSIG-Owner (root), Algorithm: 8, 0 Labels, original TTL: 172800 sec, Signature-expiration: 10.10.2022, 00:00:00 +, Signature-Inception: 19.09.2022, 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: com
com
1 DS RR in the parent zone found



DS with Algorithm 8, KeyTag 30909, DigestType 2 and Digest 4tPJFvbe6scylOgmj7WIUESoM/xUWViPSpGEz8QaV2Y=



1 RRSIG RR to validate DS RR found



RRSIG-Owner com., Algorithm: 8, 1 Labels, original TTL: 86400 sec, Signature-expiration: 05.10.2022, 16:00:00 +, Signature-Inception: 22.09.2022, 15:00:00 +, KeyTag 20826, Signer-Name: (root)



Status: Good - Algorithmus 8 and DNSKEY with KeyTag 20826 used to validate the DS RRSet in the parent zone



2 DNSKEY RR found



Public Key with Algorithm 8, KeyTag 30909, Flags 257 (SEP = Secure Entry Point)



Public Key with Algorithm 8, KeyTag 32298, Flags 256



1 RRSIG RR to validate DNSKEY RR found



RRSIG-Owner com., Algorithm: 8, 1 Labels, original TTL: 86400 sec, Signature-expiration: 07.10.2022, 18:24:21 +, Signature-Inception: 22.09.2022, 18:19:21 +, KeyTag 30909, Signer-Name: com



Status: Good - Algorithmus 8 and DNSKEY with KeyTag 30909 used to validate the DNSKEY RRSet



Status: Valid Chain of trust. Parent-DS with Algorithm 8, KeyTag 30909, DigestType 2 and Digest "4tPJFvbe6scylOgmj7WIUESoM/xUWViPSpGEz8QaV2Y=" validates local Key with the same values, Key ist Secure Entry Point (SEP) of the zone

Zone: 3doptimizer.com
3doptimizer.com
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 "sre6m40udrqev5cjk2o62bf0rck968qc" between the hashed NSEC3-owner "sre5q8e1rmefp5nk5o2m573jnum95b7h" and the hashed NextOwner "sre73m4iacbga6qkii2c24n6lcuvql60". So the parent zone confirmes the not-existence of a DS RR.
Bitmap: NS, DS, RRSIG Validated: RRSIG-Owner sre5q8e1rmefp5nk5o2m573jnum95b7h.com., Algorithm: 8, 2 Labels, original TTL: 86400 sec, Signature-expiration: 28.09.2022, 06:09:27 +, Signature-Inception: 21.09.2022, 04:59:27 +, KeyTag 32298, Signer-Name: com



DS-Query in the parent zone sends valid NSEC3 RR with the Hash "ck0pojmg874ljref7efn8430qvit8bsm" as Owner. That's the Hash of "com" with the NextHashedOwnerName "ck0q2d6ni4i7eqh8na30ns61o48ul8g5". So that domain name is the Closest Encloser of "3doptimizer.com". Opt-Out: True.
Bitmap: NS, SOA, RRSIG, DNSKEY, NSEC3PARAM Validated: RRSIG-Owner ck0pojmg874ljref7efn8430qvit8bsm.com., Algorithm: 8, 2 Labels, original TTL: 86400 sec, Signature-expiration: 28.09.2022, 04:24:28 +, Signature-Inception: 21.09.2022, 03:14:28 +, KeyTag 32298, Signer-Name: com



0 DNSKEY RR found




Zone: www.3doptimizer.com
www.3doptimizer.com
0 DS RR in the parent zone found


3. Name Servers

DomainNameserverNS-IP
3doptimizer.com
  ns-1433.awsdns-51.org
205.251.197.153
London/England/United Kingdom (GB) - Amazon.com


 
2600:9000:5305:9900::1
Seattle/Washington/United States (US) - Amazon.com


  ns-1737.awsdns-25.co.uk
205.251.198.201
London/England/United Kingdom (GB) - Amazon.com


 
2600:9000:5306:c900::1
Seattle/Washington/United States (US) - Amazon.com


  ns-780.awsdns-33.net
205.251.195.12
Herndon/Virginia/United States (US) - Amazon.com


 
2600:9000:5303:c00::1
Seattle/Washington/United States (US) - Amazon.com


  ns-79.awsdns-09.com
205.251.192.79
Roubaix/Hauts-de-France/France (FR) - Amazon.com


 
2600:9000:5300:4f00::1
Seattle/Washington/United States (US) - Amazon.com

com
  a.gtld-servers.net / nnn1-par6


  b.gtld-servers.net / nnn1-eltxl2


  c.gtld-servers.net / nnn1-par6


  d.gtld-servers.net / nnn1-par6


  e.gtld-servers.net / nnn1-par6


  f.gtld-servers.net / nnn1-fra5


  g.gtld-servers.net / nnn1-fra5


  h.gtld-servers.net / nnn1-fra5


  i.gtld-servers.net / nnn1-fra5


  j.gtld-servers.net / nnn1-frmrs-2


  k.gtld-servers.net / nnn1-frmrs-2


  l.gtld-servers.net / nnn1-frmrs-2


  m.gtld-servers.net / nnn1-frmrs-2


4. SOA-Entries


Domain:com
Zone-Name:com
Primary:a.gtld-servers.net
Mail:nstld.verisign-grs.com
Serial:1663874002
Refresh:1800
Retry:900
Expire:604800
TTL:86400
num Entries:3


Domain:com
Zone-Name:com
Primary:a.gtld-servers.net
Mail:nstld.verisign-grs.com
Serial:1663874012
Refresh:1800
Retry:900
Expire:604800
TTL:86400
num Entries:10


Domain:3doptimizer.com
Zone-Name:
Primary:
Mail:
Serial:
Refresh:
Retry:
Expire:
TTL:
num Entries:8


5. Screenshots

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

6. Url-Checks

DomainnameHttp-StatusredirectSec.G







7. Comments


1. General Results, most used to calculate the result

Aname "3doptimizer.com" is domain, public suffix is ".com", top-level-domain is ".com", top-level-domain-type is "generic", tld-manager is "VeriSign Global Registry Services", num .com-domains preloaded: 75886 (complete: 199710)
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.
XFatal error: Nameserver doesn't support TCP connection: ns-1433.awsdns-51.org / 205.251.197.153: Refused
XFatal error: Nameserver doesn't support TCP connection: ns-1433.awsdns-51.org / 2600:9000:5305:9900::1: Refused
XFatal error: Nameserver doesn't support TCP connection: ns-1737.awsdns-25.co.uk / 205.251.198.201: Refused
XFatal error: Nameserver doesn't support TCP connection: ns-1737.awsdns-25.co.uk / 2600:9000:5306:c900::1: Refused
XFatal error: Nameserver doesn't support TCP connection: ns-780.awsdns-33.net / 205.251.195.12: Refused
XFatal error: Nameserver doesn't support TCP connection: ns-780.awsdns-33.net / 2600:9000:5303:c00::1: Refused
XFatal error: Nameserver doesn't support TCP connection: ns-79.awsdns-09.com / 205.251.192.79: Refused
XFatal error: Nameserver doesn't support TCP connection: ns-79.awsdns-09.com / 2600:9000:5300:4f00::1: Refused

2. DNS- and NameServer - Checks

A
A
AInfo:: 13 different Name Servers found: 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, 13 Name Servers included in Delegation: 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, 13 Name Servers included in 1 Zone definitions: 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, 1 Name Servers listed in SOA.Primary: a.gtld-servers.net.
AGood: Only one SOA.Primary Name Server found.: a.gtld-servers.net.
AGood: SOA.Primary Name Server included in the delegation set.: a.gtld-servers.net.
AGood: All Name Server Domain Names have a Public Suffix.
A
AGood: Nameserver supports Echo Capitalization: 8 good Nameserver
XFatal error: Nameserver doesn't support EDNS with max. 512 Byte Udp payload or sends more then 512 Bytes: ns-1433.awsdns-51.org
XFatal error: Nameserver doesn't support EDNS with max. 512 Byte Udp payload or sends more then 512 Bytes: ns-1737.awsdns-25.co.uk
XFatal error: Nameserver doesn't support EDNS with max. 512 Byte Udp payload or sends more then 512 Bytes: ns-780.awsdns-33.net
XFatal error: Nameserver doesn't support EDNS with max. 512 Byte Udp payload or sends more then 512 Bytes: ns-79.awsdns-09.com
AGood: Nameserver has passed 10 EDNS-Checks (OP100, FLAGS, V1, V1OP100, V1FLAGS, DNSSEC, V1DNSSEC, NSID, COOKIE, CLIENTSUBNET): 13 good Nameserver
Nameserver doesn't pass all EDNS-Checks: ns-1433.awsdns-51.org / 205.251.197.153: OP100: no result. FLAGS: no result. V1: ok. V1OP100: ok. V1FLAGS: ok. DNSSEC: no result. V1DNSSEC: ok. NSID: no result. COOKIE: no result. CLIENTSUBNET: no result.
Nameserver doesn't pass all EDNS-Checks: ns-1433.awsdns-51.org / 2600:9000:5305:9900::1: OP100: no result. FLAGS: no result. V1: ok. V1OP100: ok. V1FLAGS: ok. DNSSEC: no result. V1DNSSEC: ok. NSID: no result. COOKIE: no result. CLIENTSUBNET: no result.
Nameserver doesn't pass all EDNS-Checks: ns-1737.awsdns-25.co.uk / 205.251.198.201: OP100: no result. FLAGS: no result. V1: ok. V1OP100: ok. V1FLAGS: ok. DNSSEC: no result. V1DNSSEC: ok. NSID: no result. COOKIE: no result. CLIENTSUBNET: no result.
Nameserver doesn't pass all EDNS-Checks: ns-1737.awsdns-25.co.uk / 2600:9000:5306:c900::1: OP100: no result. FLAGS: no result. V1: ok. V1OP100: ok. V1FLAGS: ok. DNSSEC: no result. V1DNSSEC: ok. NSID: no result. COOKIE: no result. CLIENTSUBNET: no result.
Nameserver doesn't pass all EDNS-Checks: ns-780.awsdns-33.net / 205.251.195.12: OP100: no result. FLAGS: no result. V1: ok. V1OP100: ok. V1FLAGS: ok. DNSSEC: no result. V1DNSSEC: ok. NSID: no result. COOKIE: no result. CLIENTSUBNET: no result.
Nameserver doesn't pass all EDNS-Checks: ns-780.awsdns-33.net / 2600:9000:5303:c00::1: OP100: no result. FLAGS: no result. V1: ok. V1OP100: ok. V1FLAGS: ok. DNSSEC: no result. V1DNSSEC: ok. NSID: no result. COOKIE: no result. CLIENTSUBNET: no result.
Nameserver doesn't pass all EDNS-Checks: ns-79.awsdns-09.com / 205.251.192.79: OP100: no result. FLAGS: no result. V1: ok. V1OP100: ok. V1FLAGS: ok. DNSSEC: no result. V1DNSSEC: ok. NSID: no result. COOKIE: no result. CLIENTSUBNET: no result.
Nameserver doesn't pass all EDNS-Checks: ns-79.awsdns-09.com / 2600:9000:5300:4f00::1: OP100: no result. FLAGS: no result. V1: ok. V1OP100: ok. V1FLAGS: ok. DNSSEC: no result. V1DNSSEC: ok. NSID: no result. COOKIE: no result. CLIENTSUBNET: no result.
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

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: 48833 milliseconds, 48.833 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)

Issuerlast 7 daysactivenum Certs
CN=R3, O=Let's Encrypt, C=US
0
0
1

CertSpotter-IdIssuernot beforenot afterDomain namesLE-Duplicatenext LE
3744409225
leaf cert
CN=R3, O=Let's Encrypt, C=US
2022-05-19 02:21:48
2022-08-17 02:21:47
3doptimizer.com - 1 entries



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

Issuerlast 7 daysactivenum Certs
CN=R3, O=Let's Encrypt, C=US
0 /0 new
0
4

CRT-IdIssuernot beforenot afterDomain namesLE-Duplicatenext LE
6758630964
precert
CN=R3, O=Let's Encrypt, C=US
2022-05-19 00:21:48
2022-08-17 00:21:47
3doptimizer.com
1 entries


6377687357
leaf cert
CN=R3, O=Let's Encrypt, C=US
2022-03-20 01:19:37
2022-06-18 00:19:36
3doptimizer.com
1 entries


6006944712
precert
CN=R3, O=Let's Encrypt, C=US
2022-01-19 01:09:39
2022-04-19 00:09:38
3doptimizer.com
1 entries


5643236078
leaf cert
CN=R3, O=Let's Encrypt, C=US
2021-11-20 01:17:14
2022-02-18 01:17:13
3doptimizer.com
1 entries



11. Html-Content - Entries

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


12. Nameserver - IP-Adresses

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


No NameServer - IP address - Informations found


13. CAA - Entries

DomainnameflagNameValue∑ Queries∑ Timeout
3doptimizer.com
-5

Refused - The name server refuses to perform the specified operation for policy reasons
1
0
com
0

no CAA entry found
1
0


14. TXT - Entries

DomainnameTXT EntryStatus∑ Queries∑ Timeout
3doptimizer.com

Refused - The name server refuses to perform the specified operation for policy reasons
1
0
_acme-challenge.3doptimizer.com

Refused - The name server refuses to perform the specified operation for policy reasons
1
0
_acme-challenge.3doptimizer.com.3doptimizer.com

Refused - The name server refuses to perform the specified operation for policy reasons
1
0


15. DomainService - Entries (SSHFP Check is new - 2022-09-24, may be incomplete, alpha, some results are required)

No DomainServiceEntries entries found



16. Cipher Suites

No Ciphers found


17. Portchecks

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



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