eu-info.de

Checked 21 October 2026, 22:19 UTC · via 8.8.8.8
!Passed with warnings
23 passed 2 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

ns1.webfactory.de, ns17.knipp.net, ns2.knipp.de, ns3.knipp.de

Found

Parent zone
de
Delegation from
a.nic.de (194.0.0.53)
NS at the parent
ns1.webfactory.de, ns17.knipp.net, ns2.knipp.de, ns3.knipp.de
NS in the zone
ns1.webfactory.de, ns17.knipp.net, ns2.knipp.de, ns3.knipp.de
NameserverAddressesNetwork (AS)Glue
ns1.webfactory.de3.121.27.48AS16509 AMAZON-02 - Amazon.com, Inc., US3.121.27.48
ns17.knipp.net195.253.51.61 2a01:5b0:2:56::3dAS8391 KNIPP-AS - Knipp Medien und Kommunikation GmbH, DE AS48519 KNIPP-AMS-AS - Knipp Medien und Kommunikation GmbH, DE-
ns2.knipp.de195.253.6.52 2a01:5b0:0:29::34AS8391 KNIPP-AS - Knipp Medien und Kommunikation GmbH, DE AS8391 KNIPP-AS - Knipp Medien und Kommunikation GmbH, DE-
ns3.knipp.de195.253.113.3 2a01:5b0:31::3AS8391 KNIPP-AS - Knipp Medien und Kommunikation GmbH, DE AS8391 KNIPP-AS - Knipp Medien und Kommunikation GmbH, DE-

Checks

  • ✓ 4 nameservers #6
    Delegated to ns1.webfactory.de, ns17.knipp.net, ns2.knipp.de, ns3.knipp.de.
  • ✓ 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 4 IPv4 /24s and 3 IPv6 /48s.
  • ✓ 3 autonomous systems #11
    The nameservers are spread over: AS16509 (AMAZON-02 - Amazon.com, Inc., US): 1 address; AS48519 (KNIPP-AMS-AS - Knipp Medien und Kommunikation GmbH, DE): 1 address; AS8391 (KNIPP-AS - Knipp Medien und Kommunikation GmbH, DE): 5 addresses.
  • ✓ Nameserver names under 2 TLDs #12
    Nameserver names use the TLDs .de, .net.
  • i
    Partly IPv6
    These nameservers have no IPv6 address: ns1.webfactory.de.
    #13

Nameservers

warn

7 of 7 addresses answer authoritatively

Found

NameserverAnswerRecursionTCP / EDNSAXFRVersion
ns1.webfactory.de 3.121.27.48NOERROR, 4 ms, authoritativenoyes / yesrefused9.18.39-0ubuntu0.22.04.7-Ubuntu
ns17.knipp.net 195.253.51.61NOERROR, 35 ms, authoritativenoyes / yesrefused-
ns17.knipp.net 2a01:5b0:2:56::3dNOERROR, 13 ms, authoritativenoyes / yesrefused-
ns2.knipp.de 195.253.6.52NOERROR, 10 ms, authoritativenoyes / yesrefused-
ns2.knipp.de 2a01:5b0:0:29::34NOERROR, 10 ms, authoritativenoyes / yesrefused-
ns3.knipp.de 195.253.113.3NOERROR, 10 ms, authoritativenoyes / yesrefused-
ns3.knipp.de 2a01:5b0:31::3NOERROR, 10 ms, authoritativenoyes / yesrefused-

Checks

  • ✓ All respond #14
    All 7 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.webfactory.de: "9.18.39-0ubuntu0.22.04.7-Ubuntu". 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 2023101700 · primary ns1.webfactory.de

Found

Primary (MNAME)
ns1.webfactory.de
Contact (RNAME)
hostmaster.webfactory.de
Serial
2023101700
Refresh / retry
28800 s / 7200 s
Expire
604800 s
Negative TTL
900 s

Serial per nameserver

NameserverSerial
ns1.webfactory.de (3.121.27.48)2023101700
ns17.knipp.net (195.253.51.61)2023101700
ns17.knipp.net (2a01:5b0:2:56::3d)2023101700
ns2.knipp.de (195.253.6.52)2023101700
ns2.knipp.de (2a01:5b0:0:29::34)2023101700
ns3.knipp.de (195.253.113.3)2023101700
ns3.knipp.de (2a01:5b0:31::3)2023101700

Checks

  • ✓ Serial 2023101700 everywhere #22
    All nameservers serve the same version of the zone.
  • ✓ Timers within recommendations #23
    SOA refresh 8h, retry 2h, expire 7d, negative TTL 15m.
  • ✓ Primary is a public nameserver #24
    The primary nameserver ns1.webfactory.de is one of the listed nameservers.
  • ✓ Contact hostmaster@webfactory.de #25
    The SOA RNAME hostmaster.webfactory.de means hostmaster@webfactory.de.
  • ✓ Date-based serial #26
    The serial 2023101700 follows the YYYYMMDDnn convention (2023-10-17).

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

8 records at the apex

Found

Read from
3.121.27.48:53
TypeValueTTL
SOAns1.webfactory.de. hostmaster.webfactory.de. 2023101700 28800 7200 604800 900900
NSns17.knipp.net.900
NSns2.knipp.de.900
NSns1.webfactory.de.900
NSns3.knipp.de.900
A3.121.30.79900
MX10 mx.mail.webfactory.de.900
TXT"v=spf1 include:spf.mail.webfactory.de include:_spf.perfora.net include:_spf.kundenserver.de -all"900

Checks

  • ✓ TTLs within range #32
    TTLs: A 15m, MX 15m, NS 15m. The NS TTL at the parent is 1d and in the zone 15m; 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