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X

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

Checked:
23.06.2022 13:21:20


Older results

No older results found


1. IP-Addresses

HostTypeIP-Addressis auth.∑ Queries∑ Timeout
utef70-dynip.troja.mff.cuni.cz

Name Error
yes
1
0
www.utef70-dynip.troja.mff.cuni.cz

Name Error
yes
1
0
*.troja.mff.cuni.cz
A
Name Error
yes



AAAA
Name Error
yes



CNAME
Name Error
yes


*.utef70-dynip.troja.mff.cuni.cz
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



3 DNSKEY RR found



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



Public Key with Algorithm 8, KeyTag 20826, Flags 256



Public Key with Algorithm 8, KeyTag 47671, Flags 256



1 RRSIG RR to validate DNSKEY RR found



RRSIG-Owner (root), Algorithm: 8, 0 Labels, original TTL: 172800 sec, Signature-expiration: 11.07.2022, 00:00:00 +, Signature-Inception: 20.06.2022, 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: cz
cz
1 DS RR in the parent zone found



DS with Algorithm 13, KeyTag 20237, DigestType 2 and Digest z/Dz7NvFKcHwAxuhhAv7g1hTuSCe0eUI//SEUde3eOI=



1 RRSIG RR to validate DS RR found



RRSIG-Owner cz., Algorithm: 8, 1 Labels, original TTL: 86400 sec, Signature-expiration: 06.07.2022, 05:00:00 +, Signature-Inception: 23.06.2022, 04:00:00 +, KeyTag 47671, Signer-Name: (root)



• Status: Good - Algorithmus 8 and DNSKEY with KeyTag 47671 used to validate the DS RRSet in the parent zone



2 DNSKEY RR found



Public Key with Algorithm 13, KeyTag 20237, Flags 257 (SEP = Secure Entry Point)



Public Key with Algorithm 13, KeyTag 60306, Flags 256



1 RRSIG RR to validate DNSKEY RR found



RRSIG-Owner cz., Algorithm: 13, 1 Labels, original TTL: 3600 sec, Signature-expiration: 04.07.2022, 06:21:34 +, Signature-Inception: 20.06.2022, 04:51:34 +, KeyTag 20237, Signer-Name: cz



• Status: Good - Algorithmus 13 and DNSKEY with KeyTag 20237 used to validate the DNSKEY RRSet



• Status: Valid Chain of trust. Parent-DS with Algorithm 13, KeyTag 20237, DigestType 2 and Digest "z/Dz7NvFKcHwAxuhhAv7g1hTuSCe0eUI//SEUde3eOI=" validates local Key with the same values, Key ist Secure Entry Point (SEP) of the zone

Zone: cuni.cz
cuni.cz
1 DS RR in the parent zone found



DS with Algorithm 13, KeyTag 32757, DigestType 2 and Digest UM30TtMbFHOYe0dZ24fn+oZmR/9Bvy1GjrKkv3tCdgw=



1 RRSIG RR to validate DS RR found



RRSIG-Owner cuni.cz., Algorithm: 13, 2 Labels, original TTL: 3600 sec, Signature-expiration: 04.07.2022, 03:50:45 +, Signature-Inception: 20.06.2022, 02:20:45 +, KeyTag 60306, Signer-Name: cz



• Status: Good - Algorithmus 13 and DNSKEY with KeyTag 60306 used to validate the DS RRSet in the parent zone



1 DNSKEY RR found



Public Key with Algorithm 13, KeyTag 32757, Flags 257 (SEP = Secure Entry Point)



1 RRSIG RR to validate DNSKEY RR found



RRSIG-Owner cuni.cz., Algorithm: 13, 2 Labels, original TTL: 86400 sec, Signature-expiration: 01.07.2022, 11:59:11 +, Signature-Inception: 01.06.2022, 11:55:41 +, KeyTag 32757, Signer-Name: cuni.cz



• Status: Good - Algorithmus 13 and DNSKEY with KeyTag 32757 used to validate the DNSKEY RRSet



• Status: Valid Chain of trust. Parent-DS with Algorithm 13, KeyTag 32757, DigestType 2 and Digest "UM30TtMbFHOYe0dZ24fn+oZmR/9Bvy1GjrKkv3tCdgw=" validates local Key with the same values, Key ist Secure Entry Point (SEP) of the zone

Zone: mff.cuni.cz
mff.cuni.cz
1 DS RR in the parent zone found



DS with Algorithm 13, KeyTag 47500, DigestType 2 and Digest blMWqSvxrJX0+ZFvVxldMFqeCO99D92mJ09HsDpqvBk=



1 RRSIG RR to validate DS RR found



RRSIG-Owner mff.cuni.cz., Algorithm: 13, 3 Labels, original TTL: 86400 sec, Signature-expiration: 19.07.2022, 11:52:43 +, Signature-Inception: 19.06.2022, 10:54:52 +, KeyTag 32757, Signer-Name: cuni.cz



• Status: Good - Algorithmus 13 and DNSKEY with KeyTag 32757 used to validate the DS RRSet in the parent zone



1 DNSKEY RR found



Public Key with Algorithm 13, KeyTag 47500, Flags 257 (SEP = Secure Entry Point)



1 RRSIG RR to validate DNSKEY RR found



RRSIG-Owner mff.cuni.cz., Algorithm: 13, 3 Labels, original TTL: 28800 sec, Signature-expiration: 29.08.2022, 03:13:00 +, Signature-Inception: 01.05.2022, 03:03:13 +, KeyTag 47500, Signer-Name: mff.cuni.cz



• Status: Good - Algorithmus 13 and DNSKEY with KeyTag 47500 used to validate the DNSKEY RRSet



• Status: Valid Chain of trust. Parent-DS with Algorithm 13, KeyTag 47500, DigestType 2 and Digest "blMWqSvxrJX0+ZFvVxldMFqeCO99D92mJ09HsDpqvBk=" validates local Key with the same values, Key ist Secure Entry Point (SEP) of the zone

Zone: troja.mff.cuni.cz
troja.mff.cuni.cz
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 "eqo84l6i475g1qteb3hu82up4btond47" between the hashed NSEC3-owner "eqo84l6i475g1qteb3hu82up4btond47" and the hashed NextOwner "er9j2mnvd54baeui4gglh04ihi31h3lf". So the parent zone confirmes the not-existence of a DS RR.
Bitmap: No Bitmap? Validated: RRSIG-Owner eqo84l6i475g1qteb3hu82up4btond47.mff.cuni.cz., Algorithm: 13, 4 Labels, original TTL: 3600 sec, Signature-expiration: 10.09.2022, 20:08:14 +, Signature-Inception: 13.05.2022, 19:31:23 +, KeyTag 47500, Signer-Name: mff.cuni.cz



0 DNSKEY RR found




Zone: utef70-dynip.troja.mff.cuni.cz
utef70-dynip.troja.mff.cuni.cz
0 DS RR in the parent zone found

Zone: www.utef70-dynip.troja.mff.cuni.cz
www.utef70-dynip.troja.mff.cuni.cz
0 DS RR in the parent zone found


3. Name Servers

DomainNameserverNS-IP
www.utef70-dynip.troja.mff.cuni.cz
•  ns.troja.mff.cuni.cz

utef70-dynip.troja.mff.cuni.cz
•  ns.troja.mff.cuni.cz

troja.mff.cuni.cz
•  david.ruk.cuni.cz
2001:718:1203:502::2
Hradec Králové/Kralovehradecky kraj/Czechia (CZ) - CESNET6-TCZ		•

•  golias.ruk.cuni.cz
2001:718:1e03:1::2
Prague/Hlavni mesto Praha/Czechia (CZ) - CESNET6-TCZ		•

•  kerberos.troja.mff.cuni.cz
195.113.28.1
Prague/Hlavni mesto Praha/Czechia (CZ) - CESNET-TCZ		•

•  ns.troja.mff.cuni.cz
195.113.28.1
Prague/Hlavni mesto Praha/Czechia (CZ) - CESNET-TCZ		•

•  ns2.troja.mff.cuni.cz
195.113.28.3
Prague/Hlavni mesto Praha/Czechia (CZ) - CESNET-TCZ		•
mff.cuni.cz
•  david.ruk.cuni.cz
2001:718:1203:502::2
Hradec Králové/Kralovehradecky kraj/Czechia (CZ) - CESNET6-TCZ		•

•  golias.ruk.cuni.cz
2001:718:1e03:1::2
Prague/Hlavni mesto Praha/Czechia (CZ) - CESNET6-TCZ		•

•  ns.ms.mff.cuni.cz
195.113.20.71
Old Town/Hlavni mesto Praha/Czechia (CZ) - CESNET-TCZ		•

•  ns.n.mff.cuni.cz
2001:718:1e03:e01::2
Prague/Hlavni mesto Praha/Czechia (CZ) - CESNET6-TCZ		•

•  sns.ms.mff.cuni.cz
195.113.20.77
Old Town/Hlavni mesto Praha/Czechia (CZ) - CESNET-TCZ		•
cuni.cz
•  cuce.ruk.cuni.cz
2001:718:1e03:1::8
Prague/Hlavni mesto Praha/Czechia (CZ) - CESNET6-TCZ		•

•  david.ruk.cuni.cz
2001:718:1203:502::2
Hradec Králové/Kralovehradecky kraj/Czechia (CZ) - CESNET6-TCZ		•

•  golias.ruk.cuni.cz
2001:718:1e03:1::2
Prague/Hlavni mesto Praha/Czechia (CZ) - CESNET6-TCZ		•

•  nsa.ces.net / �Q�
2001:718:1:1::144:205
Prague/Hlavni mesto Praha/Czechia (CZ) - CESNET z.s.p.o		•
cz
•  a.ns.nic.cz / dns-sgix-02.nic.cz
•

•  b.ns.nic.cz / dns-netnod-01.nic.cz
•

•  c.ns.nic.cz / dns-linx-dns01.nic.cz
•

•  d.ns.nic.cz / dns-linx-dns02.nic.cz
•


4. SOA-Entries


Domain:cz
Zone-Name:cz
Primary:a.ns.nic.cz
Mail:hostmaster.nic.cz
Serial:1655983238
Refresh:900
Retry:300
Expire:604800
TTL:900
num Entries:4


Domain:cuni.cz
Zone-Name:cuni.cz
Primary:golias.ruk.cuni.cz
Mail:postmaster.dec59.ruk.cuni.cz
Serial:2022061679
Refresh:28800
Retry:7200
Expire:1209600
TTL:86400
num Entries:4


Domain:mff.cuni.cz
Zone-Name:mff.cuni.cz
Primary:ns.ms.mff.cuni.cz
Mail:hostmaster.ms.mff.cuni.cz
Serial:2021091105
Refresh:3600
Retry:1200
Expire:2419200
TTL:3600
num Entries:5


Domain:troja.mff.cuni.cz
Zone-Name:troja.mff.cuni.cz
Primary:ns.troja.mff.cuni.cz
Mail:netadm.troja.mff.cuni.cz
Serial:2022062000
Refresh:10800
Retry:3600
Expire:3600000
TTL:300
num Entries:5


Domain:utef70-dynip.troja.mff.cuni.cz
Zone-Name:
Primary:
Mail:
Serial:
Refresh:
Retry:
Expire:
TTL:
num Entries:1


Domain:www.utef70-dynip.troja.mff.cuni.cz
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 "utef70-dynip.troja.mff.cuni.cz" is subdomain, public suffix is ".cz", top-level-domain is ".cz", top-level-domain-type is "country-code", Country is Czechia, tld-manager is "CZ.NIC, z.s.p.o", num .cz-domains preloaded: 1408 (complete: 175327)
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.

2. DNS- and NameServer - Checks

AInfo:: 23 Root-climbing DNS Queries required to find all IPv4- and IPv6-Addresses of 2 Name Servers.
AInfo:: 23 Queries complete, 21 with IPv6, 2 with IPv4.
Warning: Only some DNS Queries done via ipv6. IPv6 is the future, so the name servers of your name servers should have ipv6 addresses.
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.david.ruk.cuni.cz (2001:718:1203:502::2, 78.128.213.242), david.ruk.cuni.cz (2001:718:1203:502::2, 78.128.213.242), golias.ruk.cuni.cz (195.113.0.2, 2001:718:1e03:1::2)
Bad (greater 8):: An average of 11.5 queries per domain name server required to find all ip addresses of all name servers.
AInfo:: 5 different Name Servers found: david.ruk.cuni.cz, golias.ruk.cuni.cz, kerberos.troja.mff.cuni.cz, ns.troja.mff.cuni.cz, ns2.troja.mff.cuni.cz, 4 Name Servers included in Delegation: david.ruk.cuni.cz, golias.ruk.cuni.cz, kerberos.troja.mff.cuni.cz, ns2.troja.mff.cuni.cz, 4 Name Servers included in 1 Zone definitions: david.ruk.cuni.cz, golias.ruk.cuni.cz, ns.troja.mff.cuni.cz, ns2.troja.mff.cuni.cz, 1 Name Servers listed in SOA.Primary: ns.troja.mff.cuni.cz.
AGood: Only one SOA.Primary Name Server found.: ns.troja.mff.cuni.cz.
Error: SOA.Primary Name Server not included in the delegation set.: ns.troja.mff.cuni.cz.
XFatal: Inconsistency 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.: david.ruk.cuni.cz (2001:718:1203:502::2): Delegation: david.ruk.cuni.cz, golias.ruk.cuni.cz, kerberos.troja.mff.cuni.cz, ns2.troja.mff.cuni.cz, Zone: david.ruk.cuni.cz, golias.ruk.cuni.cz, ns.troja.mff.cuni.cz, ns2.troja.mff.cuni.cz. Name Servers defined in Delegation, missing in Zone: kerberos.troja.mff.cuni.cz.Name Servers defined in Zone, missing in Delegation: ns.troja.mff.cuni.cz.
XFatal: Inconsistency 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.: golias.ruk.cuni.cz (2001:718:1e03:1::2): Delegation: david.ruk.cuni.cz, golias.ruk.cuni.cz, kerberos.troja.mff.cuni.cz, ns2.troja.mff.cuni.cz, Zone: david.ruk.cuni.cz, golias.ruk.cuni.cz, ns.troja.mff.cuni.cz, ns2.troja.mff.cuni.cz. Name Servers defined in Delegation, missing in Zone: kerberos.troja.mff.cuni.cz.Name Servers defined in Zone, missing in Delegation: ns.troja.mff.cuni.cz.
XFatal: Inconsistency 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.: kerberos.troja.mff.cuni.cz (195.113.28.1): Delegation: david.ruk.cuni.cz, golias.ruk.cuni.cz, kerberos.troja.mff.cuni.cz, ns2.troja.mff.cuni.cz, Zone: david.ruk.cuni.cz, golias.ruk.cuni.cz, ns.troja.mff.cuni.cz, ns2.troja.mff.cuni.cz. Name Servers defined in Delegation, missing in Zone: kerberos.troja.mff.cuni.cz.Name Servers defined in Zone, missing in Delegation: ns.troja.mff.cuni.cz.
XFatal: Inconsistency 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.: ns.troja.mff.cuni.cz (195.113.28.1): Delegation: david.ruk.cuni.cz, golias.ruk.cuni.cz, kerberos.troja.mff.cuni.cz, ns2.troja.mff.cuni.cz, Zone: david.ruk.cuni.cz, golias.ruk.cuni.cz, ns.troja.mff.cuni.cz, ns2.troja.mff.cuni.cz. Name Servers defined in Delegation, missing in Zone: kerberos.troja.mff.cuni.cz.Name Servers defined in Zone, missing in Delegation: ns.troja.mff.cuni.cz.
XFatal: Inconsistency 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.: ns2.troja.mff.cuni.cz (195.113.28.3): Delegation: david.ruk.cuni.cz, golias.ruk.cuni.cz, kerberos.troja.mff.cuni.cz, ns2.troja.mff.cuni.cz, Zone: david.ruk.cuni.cz, golias.ruk.cuni.cz, ns.troja.mff.cuni.cz, ns2.troja.mff.cuni.cz. Name Servers defined in Delegation, missing in Zone: kerberos.troja.mff.cuni.cz.Name Servers defined in Zone, missing in Delegation: ns.troja.mff.cuni.cz.
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.
AInfo: Ipv4-Subnet-list: 3 Name Servers, 1 different subnets (first Byte): 195., 1 different subnets (first two Bytes): 195.113., 1 different subnets (first three Bytes): 195.113.28.
XFatal: All Name Server IPv4 addresses from the same subnet. Check https://www.iana.org/help/nameserver-requirements to learn some basics about name server configurations. If you manage these name servers, fix it. If it's your provider, change your provider.:
AInfo: IPv6-Subnet-list: 2 Name Servers with IPv6, 1 different subnets (first block): 2001:, 1 different subnets (first two blocks): 2001:0718:, 2 different subnets (first three blocks): 2001:0718:1203:, 2001:0718:1e03:, 2 different subnets (first four blocks): 2001:0718:1203:0502:, 2001:0718:1e03:0001:
AGood: Name Server IPv6 addresses from different subnets found.
AGood: Nameserver supports TCP connections: 5 good Nameserver
AGood: Nameserver supports Echo Capitalization: 5 good Nameserver
AGood: Nameserver supports EDNS with max. 512 Byte Udp payload, message is smaller: 5 good Nameserver
Nameserver doesn't pass all EDNS-Checks: ns.troja.mff.cuni.cz: 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: ns.troja.mff.cuni.cz: 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.
AGood: All SOA have the same Serial Number
Agood: CAA entries found, creating certificate is limited: digicert.com is allowed to create certificates
Agood: CAA entries found, creating certificate is limited: letsencrypt.org is allowed to create certificates
Agood: CAA entries found, creating certificate is limited: sectigo.com is allowed to create certificates
Agood: CAA entries found, creating certificate is limited: no CAA is allowed to create wildcard certificates

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: 68497 milliseconds, 68.497 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" > 2019 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. Nameserver - IP-Adresses

Required Root-climbing DNS-Queries to find ip addresses of all Name Servers: david.ruk.cuni.cz, golias.ruk.cuni.cz, kerberos.troja.mff.cuni.cz, ns.troja.mff.cuni.cz, ns2.troja.mff.cuni.cz

QNr.DomainTypeNS used
1
cz
NS
d.root-servers.net (2001:500:2d::d)

Answer: a.ns.nic.cz, b.ns.nic.cz, c.ns.nic.cz, d.ns.nic.cz
2
david.ruk.cuni.cz: 2001:718:1203:502::2, 78.128.213.242
NS
a.ns.nic.cz (2001:678:f::1)

Answer: cuce.ruk.cuni.cz
195.113.0.8, 2001:718:1e03:1::8

Answer: golias.ruk.cuni.cz
195.113.0.2, 2001:718:1e03:1::2
3
kerberos.troja.mff.cuni.cz
NS
a.ns.nic.cz (2001:678:f::1)

Answer: cuce.ruk.cuni.cz, david.ruk.cuni.cz, golias.ruk.cuni.cz, nsa.ces.net

Answer: cuce.ruk.cuni.cz
195.113.0.8, 2001:718:1e03:1::8

Answer: david.ruk.cuni.cz
2001:718:1203:502::2, 78.128.213.242

Answer: golias.ruk.cuni.cz
195.113.0.2, 2001:718:1e03:1::2
4
ns.troja.mff.cuni.cz
NS
a.ns.nic.cz (2001:678:f::1)

Answer: cuce.ruk.cuni.cz, david.ruk.cuni.cz, golias.ruk.cuni.cz, nsa.ces.net

Answer: cuce.ruk.cuni.cz
195.113.0.8, 2001:718:1e03:1::8

Answer: david.ruk.cuni.cz
2001:718:1203:502::2, 78.128.213.242

Answer: golias.ruk.cuni.cz
195.113.0.2, 2001:718:1e03:1::2
5
ns2.troja.mff.cuni.cz
NS
a.ns.nic.cz (2001:678:f::1)

Answer: cuce.ruk.cuni.cz, david.ruk.cuni.cz, golias.ruk.cuni.cz, nsa.ces.net

Answer: cuce.ruk.cuni.cz
195.113.0.8, 2001:718:1e03:1::8

Answer: david.ruk.cuni.cz
2001:718:1203:502::2, 78.128.213.242

Answer: golias.ruk.cuni.cz
195.113.0.2, 2001:718:1e03:1::2
6
net
NS
d.root-servers.net (2001:500:2d::d)

Answer: 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
7
nsa.ces.net: 195.113.144.205, 2001:718:1:1::144:205
NS
a.gtld-servers.net (2001:503:a83e::2:30)
8
decsys.vsb.cz: 158.196.149.9, 2001:718:1001:149::9
NS
a.ns.nic.cz (2001:678:f::1)
9
nsa.cesnet.cz: 195.113.144.228, 2001:718:1:101::144:228
NS
a.ns.nic.cz (2001:678:f::1)

Answer: decsys.vsb.cz
158.196.149.9, 2001:718:1001:149::9
10
sk
NS
g.root-servers.net (2001:500:12::d0d)

Answer: a.tld.sk, b.tld.sk, c.tld.sk, e.tld.sk, f.tld.sk, g.tld.sk, h.tld.sk
11
sun.uakom.sk: 192.108.131.11, 2001:4118:100:1::11
NS
b.tld.sk (2001:678:90::1)

Answer: ns.umb.sk
194.160.44.11
12
nsa.ten.cz
NS
a.ns.nic.cz (2001:678:f::1)

Answer: decsys.vsb.cz, nsa.ces.net, nsa.cesnet.cz, nsa.ten.cz

Answer: decsys.vsb.cz
158.196.149.9, 2001:718:1001:149::9

Answer: nsa.cesnet.cz
195.113.144.228, 2001:718:1:101::144:228
13
ns.fei.stuba.sk
NS
a.tld.sk (2001:678:70::1)

Answer: ns.cvt.stuba.sk, ns.stuba.sk, sun.uakom.sk

Answer: ns.cvt.stuba.sk
147.175.1.11

Answer: ns.stuba.sk
147.175.111.15

Answer: sun.uakom.sk
192.108.131.11, 2001:4118:100:1::11
14
nsa.ten.cz: 81.95.101.67
A
decsys.vsb.cz (2001:718:1001:149::9)
15
nsa.ten.cz: 2a02:4a8:ac24:115::101:67
AAAA
decsys.vsb.cz (2001:718:1001:149::9)
16
ns.fei.stuba.sk: 147.175.111.15
A
ns.cvt.stuba.sk (147.175.1.11)
17
ns.fei.stuba.sk: 2001:4118:10:6f00::f
AAAA
ns.cvt.stuba.sk (147.175.1.11)
18
kerberos.troja.mff.cuni.cz: No A record found
A
cuce.ruk.cuni.cz (2001:718:1e03:1::8)
19
kerberos.troja.mff.cuni.cz: No AAAA record found
AAAA
cuce.ruk.cuni.cz (2001:718:1e03:1::8)
20
ns.troja.mff.cuni.cz: No A record found
A
cuce.ruk.cuni.cz (2001:718:1e03:1::8)
21
ns.troja.mff.cuni.cz: No AAAA record found
AAAA
cuce.ruk.cuni.cz (2001:718:1e03:1::8)
22
ns2.troja.mff.cuni.cz: No A record found
A
cuce.ruk.cuni.cz (2001:718:1e03:1::8)
23
ns2.troja.mff.cuni.cz: No AAAA record found
AAAA
cuce.ruk.cuni.cz (2001:718:1e03:1::8)


13. CAA - Entries

DomainnameflagNameValue∑ Queries∑ Timeout
troja.mff.cuni.cz
0

no CAA entry found
1
0
mff.cuni.cz
9
issuewild
;
1
0

5
iodef
mailto:netadm@mff.cuni.cz
1
0

5
issue
sectigo.com
1
0
cuni.cz
5
issue
digicert.com
1
0

5
issue
letsencrypt.org
1
0

5
iodef
mailto:tcs@cuni.cz
1
0

5
issue
sectigo.com
1
0
cz
0

no CAA entry found
1
0


14. TXT - Entries

DomainnameTXT EntryStatus∑ Queries∑ Timeout
troja.mff.cuni.cz
google-site-verification=pOxuSMJsWs1CQOZUht9XklbyY0Wx7YlWlLu3ehJmktc
ok
1
0
_acme-challenge.utef70-dynip.troja.mff.cuni.cz.troja.mff.cuni.cz

Name Error - The domain name does not exist
1
0


15. Portchecks

No Port checks



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