hfm-detmold.de

Checked 21 October 2026, 22:50 UTC · via 8.8.8.8
!Passed with warnings
20 passed 2 warnings 0 failed 7 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

manul.noc.th-owl.de, serval.noc.th-owl.de

Found

Parent zone
de
Delegation from
a.nic.de (194.0.0.53)
NS at the parent
manul.noc.th-owl.de, serval.noc.th-owl.de
NS in the zone
manul.noc.th-owl.de, serval.noc.th-owl.de
NameserverAddressesNetwork (AS)Glue
manul.noc.th-owl.de193.174.118.77 2001:638:505:102::77AS680 DFN - Verein zur Foerderung eines Deutschen Forschungsnetzes e.V., DE AS680 DFN - Verein zur Foerderung eines Deutschen Forschungsnetzes e.V., DE193.174.118.77 2001:638:505:102::77
serval.noc.th-owl.de131.234.194.196 2001:638:502:994::196AS680 DFN - Verein zur Foerderung eines Deutschen Forschungsnetzes e.V., DE AS680 DFN - Verein zur Foerderung eines Deutschen Forschungsnetzes e.V., DE131.234.194.196 2001:638:502:994::196

Checks

  • i
    2 nameservers
    Two nameservers meet the minimum; RFC 2182 recommends three or more for important zones: manul.noc.th-owl.de, serval.noc.th-owl.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.
  • i
    All nameservers in one AS
    All nameserver addresses are announced by one network operator (AS680 (DFN - Verein zur Foerderung eines Deutschen Forschungsnetzes e.V., DE): 4 addresses). An outage or attack on that network affects all nameservers; large anycast providers mitigate this, but a secondary DNS provider adds independence.
    #11
  • 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

pass

4 of 4 addresses answer authoritatively

Found

NameserverAnswerRecursionTCP / EDNSAXFRVersion
manul.noc.th-owl.de 193.174.118.77NOERROR, 10 ms, authoritativenoyes / yesrefused-
manul.noc.th-owl.de 2001:638:505:102::77NOERROR, 10 ms, authoritativenoyes / yesrefused-
serval.noc.th-owl.de 131.234.194.196NOERROR, 12 ms, authoritativenoyes / yesrefused-
serval.noc.th-owl.de 2001:638:502:994::196NOERROR, 12 ms, authoritativenoyes / yesrefused-

Checks

  • ✓ All respond #14
    All 4 nameserver addresses answered.
  • ✓ All authoritative #15
    Every responding nameserver answers authoritatively for the zone.
  • ✓ No recursion #16
    The nameservers do not answer recursive queries for other domains.
  • ✓ No version disclosed #17
    The nameservers don't reveal their software version.
  • ✓ 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

warn

serial 532115827 · primary leopard.noc.th-owl.de

Found

Primary (MNAME)
leopard.noc.th-owl.de
Contact (RNAME)
hostmaster.th-owl.de
Serial
532115827
Refresh / retry
7200 s / 7200 s
Expire
1209600 s
Negative TTL
10800 s

Serial per nameserver

NameserverSerial
manul.noc.th-owl.de (193.174.118.77)532115827
manul.noc.th-owl.de (2001:638:505:102::77)532115827
serval.noc.th-owl.de (131.234.194.196)532115827
serval.noc.th-owl.de (2001:638:502:994::196)532115827

Checks

  • ✓ Serial 532115827 everywhere #22
    All nameservers serve the same version of the zone.
  • !
    Unusual SOA timers
    retry 2h should be shorter than refresh 2h. Current values: refresh 2h, retry 2h, expire 14d, negative TTL 3h.
    #23
  • i
    Hidden master
    The primary nameserver leopard.noc.th-owl.de is not listed as a nameserver: a hidden master that only feeds the public secondaries. That is a common setup; make sure it is not reachable for zone transfers from outside.
    #24
  • ✓ Contact hostmaster@th-owl.de #25
    The SOA RNAME hostmaster.th-owl.de means hostmaster@th-owl.de.
  • ✓ Counter serial #26
    The serial 532115827 is a plain counter.

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

13 records at the apex

Found

Read from
193.174.118.77:53
TypeValueTTL
SOAleopard.noc.th-owl.de. hostmaster.th-owl.de. 532115827 7200 7200 1209600 108003600
NSserval.noc.th-owl.de.3600
NSmanul.noc.th-owl.de.3600
A193.174.119.2433600
MX100 c2401.mx.srv.dfn.de.3600
MX100 b2401.mx.srv.dfn.de.3600
MX100 a2401.mx.srv.dfn.de.3600
TXT"ms38487315"3600
TXT"adobe-idp-site-verification=40d1d4341e297063fffebb0924ac9c4ce4534e4f8e015975fe5c827a5d4258af"3600
TXT"v=spf1 mx ip4:80.70.184.127/32 a:a2402.mx.srv.dfn.de a:b2402.mx.srv.dfn.de a:c2402.mx.srv.dfn.de a:uhura1.skim.hs-owl.de a:uhura2.skim.hs-owl.de include:servers.mcsv.net include:khm.de include:ispgateway.de -all"3600
TXT"spycloud-domain-verification=3d3728f1-3a84-403e-9bba-e2662176d75b"3600
TXT"sophos-domain-verification=58785ff3b3e835b87df8be7ad6892eb72a165cc6d8147d59b971039524a8c5b9"3600
TXT"brevo-code:6d3fb1c39a07d6d06e0be81f5bce4f1c"3600

Checks

  • ✓ TTLs within range #32
    TTLs: A 1h, MX 1h, NS 1h. The NS TTL at the parent is 1d and in the zone 1h; 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