herzog-it.de

Checked 21 October 2026, 22:50 UTC · via 8.8.8.8
✗Problems found
19 passed 2 warnings 2 failed 6 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

ns2.hans.hosteurope.de, ns3.herzog-it.de

Found

Parent zone
de
Delegation from
a.nic.de (194.0.0.53)
NS at the parent
ns2.hans.hosteurope.de, ns3.herzog-it.de
NS in the zone
ns2.hans.hosteurope.de, ns3.herzog-it.de
NameserverAddressesNetwork (AS)Glue
ns2.hans.hosteurope.de80.237.128.10 2a01:488::1000:53AS20773 GODADDY - Host Europe GmbH, DE AS20773 GODADDY - Host Europe GmbH, DE-
ns3.herzog-it.de91.250.112.170AS8972 GD-EMEA-DC-SXB1 - Host Europe GmbH, DE91.250.112.170

Checks

  • i
    2 nameservers
    Two nameservers meet the minimum; RFC 2182 recommends three or more for important zones: ns2.hans.hosteurope.de, ns3.herzog-it.de.
    #6
  • ✓ Parent and zone agree #7
    The parent delegation and the zone's NS records list the same nameservers.
  • ✓ Glue present and correct #8
    Glue is published for the nameservers inside the zone: ns3.herzog-it.de.
  • ✓ 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 1 IPv6 /48.
  • ✓ 2 autonomous systems #11
    The nameservers are spread over: AS20773 (GODADDY - Host Europe GmbH, DE): 2 addresses; AS8972 (GD-EMEA-DC-SXB1 - Host Europe GmbH, DE): 1 address.
  • 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
  • i
    Partly IPv6
    These nameservers have no IPv6 address: ns3.herzog-it.de.
    #13

Nameservers

fail

2 of 3 addresses answer authoritatively

Found

NameserverAnswerRecursionTCP / EDNSAXFRVersion
ns2.hans.hosteurope.de 80.237.128.10NOERROR, 6 ms, authoritativenoyes / norefused-
ns2.hans.hosteurope.de 2a01:488::1000:53no responsenono / no--
ns3.herzog-it.de 91.250.112.170NOERROR, 8 ms, authoritativenoyes / yesALLOWED (24 records)-

Checks

  • ✗
    Nameservers not responding
    These addresses did not answer, so resolvers waste time on timeouts: ns2.hans.hosteurope.de (2a01:488::1000:53): read udp [2a01:4f8:1c1c:eebf::1]:44164->[2a01:488::1000:53]: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.
  • ✓ No version disclosed #17
    The nameservers don't reveal their software version.
  • ✗
    Zone transfer allowed
    These nameservers send the complete zone to anyone who asks (AXFR), exposing all host names: ns3.herzog-it.de (91.250.112.170): 24 records. Restrict zone transfers to your secondary servers.
    #18
  • ✓ TCP supported #19
    All nameservers answer over TCP.
  • !
    No EDNS
    These nameservers don't support EDNS(0), needed for DNSSEC and answers larger than 512 bytes: ns2.hans.hosteurope.de (80.237.128.10).
    #20
  • ✓ Public addresses #21
    All nameserver addresses are publicly routable.

SOA

pass

serial 2018082101 · primary ns3.herzog-it.de

Found

Primary (MNAME)
ns3.herzog-it.de
Contact (RNAME)
m.herzog.herzog-it.de
Serial
2018082101
Refresh / retry
28800 s / 3600 s
Expire
604800 s
Negative TTL
38400 s

Serial per nameserver

NameserverSerial
ns2.hans.hosteurope.de (80.237.128.10)2018082101
ns3.herzog-it.de (91.250.112.170)2018082101

Checks

  • ✓ Serial 2018082101 everywhere #22
    All nameservers serve the same version of the zone.
  • ✓ Timers within recommendations #23
    SOA refresh 8h, retry 1h, expire 7d, negative TTL 640m.
  • ✓ Primary is a public nameserver #24
    The primary nameserver ns3.herzog-it.de is one of the listed nameservers.
  • ✓ Contact m@herzog.herzog-it.de #25
    The SOA RNAME m.herzog.herzog-it.de means m@herzog.herzog-it.de.
  • ✓ Date-based serial #26
    The serial 2018082101 follows the YYYYMMDDnn convention (2018-08-21).

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
80.237.128.10:53
TypeValueTTL
SOAns3.herzog-it.de. m.herzog.herzog-it.de. 2018082101 28800 3600 604800 3840014400
NSns2.hans.hosteurope.de.14400
NSns3.herzog-it.de.14400
A91.250.112.17014400
MX0 herzogit-de01e.mail.protection.outlook.com.14400
TXT"v=spf1 include:spf.protection.outlook.com -all"14400

Checks

  • ✓ TTLs within range #32
    TTLs: A 4h, MX 4h, NS 4h. The NS TTL at the parent is 1d and in the zone 4h; 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