ruhrmuseum.de

Checked 22 October 2026, 00:01 UTC · via 8.8.8.8
✗Problems found
21 passed 2 warnings 1 failed 5 info

Registration

info

.de country-code

Found

TLD
.de (country-code)
ICANN policies apply
no

Checks

  • i
    .de is a country-code TLD (ccTLD)
    Country-code TLD: governed by its local registry under national policy, not by an ICANN contract. Registrar accreditation, dispute resolution and RDAP/WHOIS rules are set by the registry.
    #1
  • ✓ TLD delegated and signed #2
    .de is delegated in the root zone and DNSSEC-signed.
  • i
    Registration data not available
    No registration data via RDAP: the registry of .de offers no RDAP service. Many ccTLD registries don't offer RDAP; check the registry's WHOIS instead.
    #3

Delegation

info

ns1.tekonet.de, ns2.tekonet.de

Found

Parent zone
de
Delegation from
a.nic.de (194.0.0.53)
NS at the parent
ns1.tekonet.de, ns2.tekonet.de
NS in the zone
ns1.tekonet.de, ns2.tekonet.de
NameserverAddressesNetwork (AS)Glue
ns1.tekonet.de194.39.185.10 2001:1438:1008:11::10AS8881 VERSATEL - 1&1 Versatel GmbH, DE AS8881 VERSATEL - 1&1 Versatel GmbH, DE194.39.185.10 2001:1438:1008:11::10
ns2.tekonet.de78.46.117.196 2a01:4f8:c0c:17c8::1AS24940 HETZNER-AS - Hetzner Online GmbH, DE AS24940 HETZNER-AS - Hetzner Online GmbH, DE78.46.117.196 2a01:4f8:c0c:17c8::1

Checks

  • i
    2 nameservers
    Two nameservers meet the minimum; RFC 2182 recommends three or more for important zones: ns1.tekonet.de, ns2.tekonet.de.
    #6
  • ✓ Parent and zone agree #7
    The parent delegation and the zone's NS records list the same nameservers.
  • ✓ No glue needed #8
    All nameservers are outside the zone, so no glue records are needed.
  • ✓ All names resolve #9
    Every nameserver name has an address and is not an alias.
  • ✓ Nameservers in different networks #10
    The nameservers are spread over 2 IPv4 /24s and 2 IPv6 /48s.
  • ✓ 2 autonomous systems #11
    The nameservers are spread over: AS24940 (HETZNER-AS - Hetzner Online GmbH, DE): 2 addresses; AS8881 (VERSATEL - 1&1 Versatel GmbH, DE): 2 addresses.
  • i
    All nameserver names under .de
    All nameserver names are under one TLD, so a problem with that TLD also makes the nameservers unreachable. Some operators use names under two TLDs for extra resilience.
    #12
  • ✓ All reachable over IPv6 #13
    Every nameserver has an IPv6 address.

Nameservers

fail

3 of 4 addresses answer authoritatively

Found

NameserverAnswerRecursionTCP / EDNSAXFRVersion
ns1.tekonet.de 194.39.185.10NOERROR, 13 ms, authoritativenoyes / yesrefused[tekobind]
ns1.tekonet.de 2001:1438:1008:11::10NOERROR, 17 ms, authoritativenoyes / yesrefused[tekobind]
ns2.tekonet.de 78.46.117.196NOERROR, 2 ms, authoritativenoyes / yesrefused9.20.29-1~deb13u1-Debian
ns2.tekonet.de 2a01:4f8:c0c:17c8::1no responsenono / no--

Checks

  • ✗
    Nameservers not responding
    These addresses did not answer, so resolvers waste time on timeouts: ns2.tekonet.de (2a01:4f8:c0c:17c8::1): read udp [2a01:4f8:1c1c:eebf::1]:53714->[2a01:4f8:c0c:17c8::1]:53: i/o timeout.
    #14
  • ✓ All authoritative #15
    Every responding nameserver answers authoritatively for the zone.
  • ✓ No recursion #16
    The nameservers do not answer recursive queries for other domains.
  • !
    Software version disclosed
    These nameservers report their software version via version.bind/version.server, which helps attackers find known vulnerabilities: ns2.tekonet.de: "9.20.29-1~deb13u1-Debian". Hide or replace the version string.
    #17
  • ✓ Zone transfers refused #18
    No nameserver allows a zone transfer to the public.
  • ✓ TCP supported #19
    All nameservers answer over TCP.
  • ✓ EDNS supported #20
    All nameservers support EDNS(0).
  • ✓ Public addresses #21
    All nameserver addresses are publicly routable.

SOA

pass

serial 1022561505 · primary ns1.tekonet.de

Found

Primary (MNAME)
ns1.tekonet.de
Contact (RNAME)
info.ruhrmuseum.de
Serial
1022561505
Refresh / retry
10800 s / 3600 s
Expire
604800 s
Negative TTL
38400 s

Serial per nameserver

NameserverSerial
ns1.tekonet.de (194.39.185.10)1022561505
ns1.tekonet.de (2001:1438:1008:11::10)1022561505
ns2.tekonet.de (78.46.117.196)1022561505

Checks

  • ✓ Serial 1022561505 everywhere #22
    All nameservers serve the same version of the zone.
  • ✓ Timers within recommendations #23
    SOA refresh 3h, retry 1h, expire 7d, negative TTL 640m.
  • ✓ Primary is a public nameserver #24
    The primary nameserver ns1.tekonet.de is one of the listed nameservers.
  • ✓ Contact info@ruhrmuseum.de #25
    The SOA RNAME info.ruhrmuseum.de means info@ruhrmuseum.de.
  • ✓ Timestamp serial #26
    The serial 1022561505 is a Unix timestamp (2002-05-28 04:51 UTC).

DNSSEC

warn

Not signed

Found

Validated by resolver
no

Checks

  • !
    Not signed
    The zone is not signed with DNSSEC, so answers can be spoofed. Enable DNSSEC at your DNS provider and publish the DS record at your registrar.
    #27

Records

info

6 records at the apex

Found

Read from
194.39.185.10:53
TypeValueTTL
SOAns1.tekonet.de. info.ruhrmuseum.de. 1022561505 10800 3600 604800 38400600
NSns2.tekonet.de.600
NSns1.tekonet.de.600
A85.13.154.15600
MX10 mx.essen.de.600
TXT"v=spf1 a mx ip4:85.13.154.15 include:essen.de -all"600

Checks

  • ✓ TTLs within range #32
    TTLs: A 10m, MX 10m, NS 10m. The NS TTL at the parent is 1d and in the zone 10m; resolvers may use either.
  • ✓ No CNAME at the apex #33
    The zone apex has no CNAME record.
  • ✓ No wildcard #34
    Names that don't exist return NXDOMAIN.
  • i
    No CAA records
    Without CAA records any certificate authority may issue certificates for this domain. A CAA record limits issuance to the CAs you use.
    #35