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




X

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

Checked:
12.02.2024 13:04:51


Older results


1. IP-Addresses

HostTypeIP-Addressis auth.∑ Queries∑ Timeout
_acme-challenge.iseo.kr
A

yes
1
0

AAAA

yes


www._acme-challenge.iseo.kr

Name Error
yes
1
0
*.iseo.kr
A
Name Error
yes



AAAA
Name Error
yes



CNAME
Name Error
yes


*._acme-challenge.iseo.kr
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



2 DNSKEY RR found



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



Public Key with Algorithm 8, KeyTag 30903, Flags 256



1 RRSIG RR to validate DNSKEY RR found



RRSIG-Owner (root), Algorithm: 8, 0 Labels, original TTL: 172800 sec, Signature-expiration: 02.03.2024, 00:00:00 +, Signature-Inception: 10.02.2024, 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: kr
kr
1 DS RR in the parent zone found



DS with Algorithm 8, KeyTag 61615, DigestType 2 and Digest 7VcKrciHE84ndfuK/7KteC0FbqIdBnfhR/L7e/VEBNo=



1 RRSIG RR to validate DS RR found



RRSIG-Owner kr., Algorithm: 8, 1 Labels, original TTL: 86400 sec, Signature-expiration: 25.02.2024, 05:00:00 +, Signature-Inception: 12.02.2024, 04:00:00 +, KeyTag 30903, Signer-Name: (root)



Status: Good - Algorithmus 8 and DNSKEY with KeyTag 30903 used to validate the DS RRSet in the parent zone



3 DNSKEY RR found



Public Key with Algorithm 8, KeyTag 24663, Flags 256



Public Key with Algorithm 8, KeyTag 61615, Flags 257 (SEP = Secure Entry Point)



Public Key with Algorithm 8, KeyTag 61944, Flags 256



1 RRSIG RR to validate DNSKEY RR found



RRSIG-Owner kr., Algorithm: 8, 1 Labels, original TTL: 86400 sec, Signature-expiration: 12.03.2024, 20:20:41 +, Signature-Inception: 11.02.2024, 19:20:42 +, KeyTag 61615, Signer-Name: kr



Status: Good - Algorithmus 8 and DNSKEY with KeyTag 61615 used to validate the DNSKEY RRSet



Status: Valid Chain of trust. Parent-DS with Algorithm 8, KeyTag 61615, DigestType 2 and Digest "7VcKrciHE84ndfuK/7KteC0FbqIdBnfhR/L7e/VEBNo=" validates local Key with the same values, Key ist Secure Entry Point (SEP) of the zone

Zone: iseo.kr
iseo.kr
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 "4plco8l391asgv5g529rn9n929c9e0f6" between the hashed NSEC3-owner "4pb8ndd6ohm1ilh0k6i4raaortjhoonu" and the hashed NextOwner "4si0a33bl6rdp46ejdikjm6ad6gbtde6". So the parent zone confirmes the not-existence of a DS RR.
Bitmap: NS, DS, RRSIG Validated: RRSIG-Owner 4pb8ndd6ohm1ilh0k6i4raaortjhoonu.kr., Algorithm: 8, 2 Labels, original TTL: 900 sec, Signature-expiration: 12.03.2024, 19:20:29 +, Signature-Inception: 11.02.2024, 19:20:29 +, KeyTag 24663, Signer-Name: kr



DS-Query in the parent zone sends valid NSEC3 RR with the Hash "psuk0eekkgpofh0k7h82hvc8g7k6e7r0" as Owner. That's the Hash of "kr" with the NextHashedOwnerName "pt4mfnudnrrdep4266qtkpe25cg7698q". So that domain name is the Closest Encloser of "iseo.kr". Opt-Out: True.
Bitmap: NS, SOA, RRSIG, DNSKEY, NSEC3PARAM Validated: RRSIG-Owner psuk0eekkgpofh0k7h82hvc8g7k6e7r0.kr., Algorithm: 8, 2 Labels, original TTL: 900 sec, Signature-expiration: 12.03.2024, 19:20:29 +, Signature-Inception: 11.02.2024, 19:20:29 +, KeyTag 24663, Signer-Name: kr



0 DNSKEY RR found




Zone: _acme-challenge.iseo.kr
_acme-challenge.iseo.kr
0 DS RR in the parent zone found



0 DNSKEY RR found




Zone: www._acme-challenge.iseo.kr
www._acme-challenge.iseo.kr
0 DS RR in the parent zone found


3. Name Servers

DomainNameserverNS-IP
www._acme-challenge.iseo.kr
  ns1.hosting.co.kr

_acme-challenge.iseo.kr
  ns1.hosting.co.kr / ns1.hosting.co.kr
121.254.170.11
Yongsan-dong/Seoul/South Korea (KR) - LG DACOM Corporation

iseo.kr
  ns1.hosting.co.kr / ns1.hosting.co.kr
121.254.170.11
Yongsan-dong/Seoul/South Korea (KR) - LG DACOM Corporation


  ns2.hosting.co.kr / ns2.hosting.co.kr
114.108.175.146
Yongsan-dong/Seoul/South Korea (KR) - LG DACOM KIDC


  ns3.hosting.co.kr / ns3.hosting.co.kr
121.254.170.12
Yongsan-dong/Seoul/South Korea (KR) - LG DACOM Corporation


  ns4.hosting.co.kr / ip-172-16-10-232.ap-northeast-2.compute.internal
43.201.141.93
Seoul/South Korea (KR) - Amazon.com, Inc.

kr
  b.dns.kr / B015


  c.dns.kr / C011


  d.dns.kr / D126


  e.dns.kr / E041


  f.dns.kr / F005


  g.dns.kr / G044


4. SOA-Entries


Domain:kr
Zone-Name:kr
Primary:g.dns.kr
Mail:domain-manager.nic.or.kr
Serial:2402120634
Refresh:3600
Retry:900
Expire:604800
TTL:900
num Entries:6


Domain:iseo.kr
Zone-Name:iseo.kr
Primary:ns1.hosting.co.kr
Mail:admin.iseo.kr
Serial:9
Refresh:21600
Retry:1800
Expire:1209600
TTL:180
num Entries:3


Domain:iseo.kr
Zone-Name:iseo.kr
Primary:ns1.hosting.co.kr
Mail:admin.iseo.kr
Serial:11
Refresh:21600
Retry:1800
Expire:1209600
TTL:180
num Entries:1


Domain:_acme-challenge.iseo.kr
Zone-Name:iseo.kr
Primary:ns1.hosting.co.kr
Mail:admin.iseo.kr
Serial:9
Refresh:21600
Retry:1800
Expire:1209600
TTL:180
num Entries:1


Domain:www._acme-challenge.iseo.kr
Zone-Name:
Primary:
Mail:
Serial:
Refresh:
Retry:
Expire:
TTL:
num Entries:1


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 "_acme-challenge.iseo.kr" is subdomain, public suffix is ".kr", top-level-domain is ".kr", top-level-domain-type is "country-code", Country is Korea (the Republic of), tld-manager is "Korea Internet & Security Agency (KISA)", num .kr-domains preloaded: 149 (complete: 239099)
AGood: No asked Authoritative Name Server had a timeout
ADNS: "Name Error" means: No www-dns-entry defined. This isn't a problem
HSTS-Preload-Status: unknown. Domain never included in the Preload-list. Check https://hstspreload.org/ to learn some basics about the Google-Preload-List.
BNo _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._acme-challenge.iseo.kr

2. Header-Checks (Cross-Origin-* headers are alpha - started 2024-06-05)

U

No https result with http status 2** or 4** (standard-check) found, no header checked.

3. DNS- and NameServer - Checks

AInfo:: 2 Root-climbing DNS Queries required to find all IPv4- and IPv6-Addresses of 4 Name Servers.
AInfo:: 2 Queries complete, 2 with IPv6, 0 with IPv4.
AGood: All DNS Queries done via IPv6.
AGood: 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.ns1.hosting.co.kr (121.254.170.11), ns2.hosting.co.kr (114.108.175.146), ns3.hosting.co.kr (121.254.170.12), ns4.hosting.co.kr (43.201.141.93)
AGood (1 - 3.0):: An average of 0.5 queries per domain name server required to find all ip addresses of all name servers.
AInfo:: 4 different Name Servers found: ns1.hosting.co.kr, ns2.hosting.co.kr, ns3.hosting.co.kr, ns4.hosting.co.kr, 4 Name Servers included in Delegation: ns1.hosting.co.kr, ns2.hosting.co.kr, ns3.hosting.co.kr, ns4.hosting.co.kr, 4 Name Servers included in 1 Zone definitions: ns1.hosting.co.kr, ns2.hosting.co.kr, ns3.hosting.co.kr, ns4.hosting.co.kr, 1 Name Servers listed in SOA.Primary: ns1.hosting.co.kr.
AGood: Only one SOA.Primary Name Server found.: ns1.hosting.co.kr.
AGood: SOA.Primary Name Server included in the delegation set.: ns1.hosting.co.kr.
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.hosting.co.kr, ns2.hosting.co.kr, ns3.hosting.co.kr, ns4.hosting.co.kr
AGood: All Name Server Domain Names have a Public Suffix.
AGood: All Name Server Domain Names ending with a Public Suffix have minimal one IPv4- or IPv6 address.
AGood: All Name Server ip addresses are public.
AGood: Minimal 2 different name servers (public suffix and public ip address) found: 4 different Name Servers found
Warning: No Name Server IPv6 address found. IPv6 is the future, so your name servers should be visible via IPv6.: 4 different Name Servers found
Warning: All Name Servers have the same Top Level Domain / Public Suffix. If there is a problem with that Top Level Domain, your domain may be affected. Better: Use Name Servers with different top level domains.: 4 Name Servers, 1 Top Level Domain: co.kr
Warning: All Name Servers have the same domain name. If there is a problem with that domain name (or with the name servers of that domain name), your domain may be affected. Better: Use Name Servers with different domain names / different top level domains.: Only one domain name used: hosting.co.kr
Warning: All Name Servers from the same Country / IP location.: 4 Name Servers, 1 Countries: KR
AInfo: Ipv4-Subnet-list: 4 Name Servers, 3 different subnets (first Byte): 114., 121., 43., 3 different subnets (first two Bytes): 114.108., 121.254., 43.201., 3 different subnets (first three Bytes): 114.108.175., 121.254.170., 43.201.141.
AGood: Name Server IPv4-addresses from different subnet found:
AGood: Nameserver supports TCP connections: 1 good Nameserver
AGood: Nameserver supports Echo Capitalization: 1 good Nameserver
XFatal error: Nameserver doesn't support EDNS with max. 512 Byte Udp payload or sends more then 512 Bytes: ns1.hosting.co.kr
XFatal error: Nameserver doesn't support EDNS with max. 512 Byte Udp payload or sends more then 512 Bytes: ns2.hosting.co.kr
XFatal error: Nameserver doesn't support EDNS with max. 512 Byte Udp payload or sends more then 512 Bytes: ns3.hosting.co.kr
XFatal error: Nameserver doesn't support EDNS with max. 512 Byte Udp payload or sends more then 512 Bytes: ns4.hosting.co.kr
Nameserver doesn't pass all EDNS-Checks: ns1.hosting.co.kr: 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.hosting.co.kr / 121.254.170.11: 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 (ns1.hosting.co.kr). COOKIE: ok. CLIENTSUBNET: no result.
Nameserver doesn't pass all EDNS-Checks: ns1.hosting.co.kr / 121.254.170.11: 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 (ns1.hosting.co.kr). COOKIE: ok. CLIENTSUBNET: no result.
Nameserver doesn't pass all EDNS-Checks: ns2.hosting.co.kr / 114.108.175.146: 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 (ns2.hosting.co.kr). COOKIE: ok. CLIENTSUBNET: no result.
Nameserver doesn't pass all EDNS-Checks: ns3.hosting.co.kr / 121.254.170.12: 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 (ns3.hosting.co.kr). COOKIE: ok. CLIENTSUBNET: no result.
Nameserver doesn't pass all EDNS-Checks: ns4.hosting.co.kr / 43.201.141.93: 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 (ip-172-16-10-232.ap-northeast-2.compute.internal). COOKIE: ok. 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.

4. 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: 261843 milliseconds, 261.843 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 - 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
1

CRT-IdIssuernot beforenot afterDomain namesLE-Duplicatenext LE
12046153181
precert
CN=R3, O=Let's Encrypt, C=US
2024-02-11 12:22:38
2024-05-11 11:22:37
*.iseo.kr
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: ns1.hosting.co.kr, ns2.hosting.co.kr, ns3.hosting.co.kr, ns4.hosting.co.kr

QNr.DomainTypeNS used
1
kr
NS
l.root-servers.net (2001:500:9f::42)

Answer: b.dns.kr, c.dns.kr, d.dns.kr, e.dns.kr, f.dns.kr, g.dns.kr
2
ns1.hosting.co.kr: 121.254.170.11
NS
d.dns.kr (2001:dcc:4::1)

Answer: ns2.hosting.co.kr
114.108.175.146

Answer: ns3.hosting.co.kr
121.254.170.12

Answer: ns4.hosting.co.kr
43.201.141.93


13. CAA - Entries

DomainnameflagNameValue∑ Queries∑ Timeout
_acme-challenge.iseo.kr
0

no CAA entry found
1
0
iseo.kr
0

no CAA entry found
1
0
kr
0

no CAA entry found
1
0


14. TXT - Entries

DomainnameTXT EntryStatus∑ Queries∑ Timeout
iseo.kr

ok
1
0
_acme-challenge.iseo.kr
DbBg9igAfIpR_NdEYwYZ_dxYtKOlvbTGZVHlavYk1Kg
looks good, correct length, correct characters
1
0
_acme-challenge._acme-challenge.iseo.kr

Name Error - The domain name does not exist
1
0
_acme-challenge._acme-challenge.iseo.kr.iseo.kr

Name Error - The domain name does not exist
1
0
_acme-challenge._acme-challenge.iseo.kr._acme-challenge.iseo.kr

Name Error - The domain name does not exist
1
0


15. DomainService - Entries (SPF-Check is alpha - 2024-06-22, DMARC-Detailcheck is alpha - 2024-07-06)

No DomainServiceEntries entries found



16. Cipher Suites

No Ciphers found


17. Portchecks

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



Permalink: https://check-your-website.server-daten.de/?i=ee06b1f5-bae8-4fbb-b318-b3398f836068


Last Result: https://check-your-website.server-daten.de/?q=_acme-challenge.iseo.kr - 2024-02-12 13:04:51


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