dillingen.de

Checked 21 October 2026, 22:14 UTC · via 8.8.8.8
!Passed with warnings
17 passed 5 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

warn

ns3.sextl.de, ns6.sextl.de

Found

Parent zone
de
Delegation from
a.nic.de (194.0.0.53)
NS at the parent
ns3.sextl.de, ns6.sextl.de
NS in the zone
ns3.sextl.de, ns6.sextl.de
NameserverAddressesNetwork (AS)Glue
ns3.sextl.de94.130.255.162AS24940 HETZNER-AS - Hetzner Online GmbH, DE194.95.207.3
ns6.sextl.de88.198.238.84AS24940 HETZNER-AS - Hetzner Online GmbH, DE88.198.238.84

Checks

  • i
    2 nameservers
    Two nameservers meet the minimum; RFC 2182 recommends three or more for important zones: ns3.sextl.de, ns6.sextl.de.
    #6
  • ✓ Parent and zone agree #7
    The parent delegation and the zone's NS records list the same nameservers.
  • !
    Glue differs from the zone
    The addresses at the parent (glue) differ from the addresses in the zone: ns3.sextl.de (glue 194.95.207.3, zone 94.130.255.162). Update the glue at your registrar.
    #8
  • ✓ 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 0 IPv6 /48s.
  • i
    All nameservers in one AS
    All nameserver addresses are announced by one network operator (AS24940 (HETZNER-AS - Hetzner Online GmbH, DE): 2 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
  • !
    No IPv6
    None of the nameservers has an IPv6 address, so IPv6-only resolvers can't reach them.
    #13

Nameservers

warn

2 of 2 addresses answer authoritatively

Found

NameserverAnswerRecursionTCP / EDNSAXFRVersion
ns3.sextl.de 94.130.255.162NOERROR, 1 ms, authoritativenoyes / yesrefused9.18.49-1~deb12u2-Debian
ns6.sextl.de 88.198.238.84NOERROR, 2 ms, authoritativenoyes / yesrefusedBIND

Checks

  • ✓ All respond #14
    All 2 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.
  • !
    Software version disclosed
    These nameservers report their software version via version.bind/version.server, which helps attackers find known vulnerabilities: ns3.sextl.de: "9.18.49-1~deb12u2-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

info

serial 2026100201 · primary zimt01.bndlg.de

Found

Primary (MNAME)
zimt01.bndlg.de
Contact (RNAME)
postmaster.zimt01.bndlg.de
Serial
2026100201
Refresh / retry
10800 s / 3600 s
Expire
604800 s
Negative TTL
86400 s

Serial per nameserver

NameserverSerial
ns3.sextl.de (94.130.255.162)2026100201
ns6.sextl.de (88.198.238.84)2026100201

Checks

  • ✓ Serial 2026100201 everywhere #22
    All nameservers serve the same version of the zone.
  • ✓ Timers within recommendations #23
    SOA refresh 3h, retry 1h, expire 7d, negative TTL 1d.
  • i
    Hidden master
    The primary nameserver zimt01.bndlg.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 postmaster@zimt01.bndlg.de #25
    The SOA RNAME postmaster.zimt01.bndlg.de means postmaster@zimt01.bndlg.de.
  • ✓ Date-based serial #26
    The serial 2026100201 follows the YYYYMMDDnn convention (2026-10-02).

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

warn

11 records at the apex

Found

Read from
94.130.255.162:53
TypeValueTTL
SOAzimt01.bndlg.de. Postmaster.zimt01.bndlg.de. 2026100201 10800 3600 604800 8640086400
NSns6.sextl.de.86400
NSns3.sextl.de.86400
A94.130.255.16860
MX5 mailgate.bndlg.de.60
TXT"4a41853fdd4ba1176ce332df11be03e620433f0c0190f5e9c45dcc658fe3b71"60
TXT"9cdea65ccee4dd34a3fb62969d7b185cc175b7f313631d60426f7b13f64ff20"60
TXT"8d1ef82ef6fa51d9234e3fb3a75786e26fd4d842df245871761c346c415d056"60
TXT"6c50a48afdfcbe936b86d61705809194642d8a4c0f19cf803b976e776474dfa"60
TXT"ce1efd6f558474573cb6d71b464f564fc6240891939c8e1c3e187b470fe5223"60
TXT"fb3611804683f8ba751b5e4d42a064aadca425815dd2e9ae74c116798ab3805"60

Checks

  • !
    Very low TTLs
    These records have a TTL below 5m, causing extra queries and slower lookups: A (1m), MX (1m). Low TTLs are useful just before a planned change.
    #32
  • ✓ 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