entropia.de

Checked 21 October 2026, 22:18 UTC · via 8.8.8.8
!Passed with warnings
22 passed 3 warnings 0 failed 4 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

ns0.entropia.de, ns1.entropia.de

Found

Parent zone
de
Delegation from
a.nic.de (194.0.0.53)
NS at the parent
ns0.entropia.de, ns1.entropia.de
NS in the zone
ns0.entropia.de, ns1.entropia.de
NameserverAddressesNetwork (AS)Glue
ns0.entropia.de49.12.234.247 2a01:4f8:c0c:c5e5::1AS24940 HETZNER-AS - Hetzner Online GmbH, DE AS24940 HETZNER-AS - Hetzner Online GmbH, DE49.12.234.247 2a01:4f8:c0c:c5e5::1
ns1.entropia.de54.38.158.180 2001:41d0:701:1100::3b9AS16276 OVH - OVH SAS, FR AS16276 OVH - OVH SAS, FR54.38.158.180 2001:41d0:701:1100::3b9

Checks

  • i
    2 nameservers
    Two nameservers meet the minimum; RFC 2182 recommends three or more for important zones: ns0.entropia.de, ns1.entropia.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: ns0.entropia.de, ns1.entropia.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 2 IPv6 /48s.
  • ✓ 2 autonomous systems #11
    The nameservers are spread over: AS16276 (OVH - OVH SAS, FR): 2 addresses; AS24940 (HETZNER-AS - Hetzner Online 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

warn

4 of 4 addresses answer authoritatively

Found

NameserverAnswerRecursionTCP / EDNSAXFRVersion
ns0.entropia.de 49.12.234.247NOERROR, 2 ms, authoritativenoyes / yesrefusedsecurity by obscurity[tm]
ns0.entropia.de 2a01:4f8:c0c:c5e5::1NOERROR, 2 ms, authoritativenoyes / yesrefusedsecurity by obscurity[tm]
ns1.entropia.de 54.38.158.180NOERROR, 6 ms, authoritativenoyes / yesrefusedKnot DNS 3.3.10
ns1.entropia.de 2001:41d0:701:1100::3b9NOERROR, 6 ms, authoritativenoyes / yesrefusedKnot DNS 3.3.10

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.
  • !
    Software version disclosed
    These nameservers report their software version via version.bind/version.server, which helps attackers find known vulnerabilities: ns1.entropia.de: "Knot DNS 3.3.10". 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 2026102202 · primary ns0.entropia.de

Found

Primary (MNAME)
ns0.entropia.de
Contact (RNAME)
root.entropia.de
Serial
2026102202
Refresh / retry
3600 s / 1800 s
Expire
604800 s
Negative TTL
3600 s

Serial per nameserver

NameserverSerial
ns0.entropia.de (49.12.234.247)2026102202
ns0.entropia.de (2a01:4f8:c0c:c5e5::1)2026102202
ns1.entropia.de (54.38.158.180)2026102202
ns1.entropia.de (2001:41d0:701:1100::3b9)2026102202

Checks

  • ✓ Serial 2026102202 everywhere #22
    All nameservers serve the same version of the zone.
  • ✓ Timers within recommendations #23
    SOA refresh 1h, retry 30m, expire 7d, negative TTL 1h.
  • ✓ Primary is a public nameserver #24
    The primary nameserver ns0.entropia.de is one of the listed nameservers.
  • ✓ Contact root@entropia.de #25
    The SOA RNAME root.entropia.de means root@entropia.de.
  • ✓ Date-based serial #26
    The serial 2026102202 follows the YYYYMMDDnn convention (2026-10-22).

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

12 records at the apex

Found

Read from
49.12.234.247:53
TypeValueTTL
SOAns0.entropia.de. root.entropia.de. 2026102202 3600 1800 604800 360060
NSns0.entropia.de.60
NSns1.entropia.de.60
A45.140.180.17660
AAAA2a0e:c5c0:0:203::60
MX1 mail.entropia.de.60
TXT"\009google-site-verification=qagvNdvjDcKN4BF6kxxhagHcWmxnRjJ-zEcYcA8Miyw"43200
TXT"v=spf1 mx ip4:45.140.180.36/32 ip6:2a0e:c5c0:0:201::7/64 ~all"43200
TXT"openpgp4fpr:5E0A9CB3980657CB9AB94AE6790EAEC8F99AB41F"43200
TXT"google-site-verification=iQHtfYPLJjKO1Bcf_2mABqfG_2hBhPj8EWUm5NGyH0M"43200
CAA0 issue "letsencrypt.org"43200
CAA0 iodef "mailto:oops@lists.entropia.de"43200

Checks

  • !
    Very low TTLs
    These records have a TTL below 5m, causing extra queries and slower lookups: A (1m), AAAA (1m), MX (1m), NS (1m). Low TTLs are useful just before a planned change. The NS TTL at the parent is 1d and in the zone 1m; resolvers may use either.
    #32
  • ✓ No CNAME at the apex #33
    The zone apex has no CNAME record.
  • ✓ No wildcard #34
    Names that don't exist return NXDOMAIN.
  • ✓ CAA restricts issuance #35
    Certificates may be issued by: letsencrypt.org.