daab.de

Checked 21 October 2026, 22:11 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

ns.iacd.net, ns2.iacd.net, ns3.knipp.de

Found

Parent zone
de
Delegation from
a.nic.de (194.0.0.53)
NS at the parent
ns.iacd.net, ns2.iacd.net, ns3.knipp.de
NS in the zone
ns.iacd.net, ns2.iacd.net, ns3.knipp.de
NameserverAddressesNetwork (AS)Glue
ns.iacd.net217.113.33.130AS16218 ASN-IACD - Ingo Assion trading as _IACD Systemhaus GmbH_, DE-
ns2.iacd.net217.113.46.200AS16218 ASN-IACD - Ingo Assion trading as _IACD Systemhaus 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

  • ✓ 3 nameservers #6
    Delegated to ns.iacd.net, ns2.iacd.net, 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 3 IPv4 /24s and 1 IPv6 /48.
  • ✓ 2 autonomous systems #11
    The nameservers are spread over: AS16218 (ASN-IACD - Ingo Assion trading as _IACD Systemhaus GmbH_, DE): 2 addresses; AS8391 (KNIPP-AS - Knipp Medien und Kommunikation GmbH, DE): 2 addresses.
  • ✓ Nameserver names under 2 TLDs #12
    Nameserver names use the TLDs .de, .net.
  • i
    Partly IPv6
    These nameservers have no IPv6 address: ns.iacd.net, ns2.iacd.net.
    #13

Nameservers

warn

4 of 4 addresses answer authoritatively

Found

NameserverAnswerRecursionTCP / EDNSAXFRVersion
ns.iacd.net 217.113.33.130NOERROR, 7 ms, authoritativenoyes / yesrefused9.18.49-1~deb12u2-Debian
ns2.iacd.net 217.113.46.200NOERROR, 12 ms, authoritativenoyes / yesrefused9.20.29-1~deb13u1-Debian
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 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: ns.iacd.net: "9.18.49-1~deb12u2-Debian"; ns2.iacd.net: "9.20.29-1~deb13u1-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

pass

serial 2026033102 · primary ns.iacd.net

Found

Primary (MNAME)
ns.iacd.net
Contact (RNAME)
hostmaster.iacd.net
Serial
2026033102
Refresh / retry
28800 s / 7200 s
Expire
1814400 s
Negative TTL
3600 s

Serial per nameserver

NameserverSerial
ns.iacd.net (217.113.33.130)2026033102
ns2.iacd.net (217.113.46.200)2026033102
ns3.knipp.de (195.253.113.3)2026033102
ns3.knipp.de (2a01:5b0:31::3)2026033102

Checks

  • ✓ Serial 2026033102 everywhere #22
    All nameservers serve the same version of the zone.
  • ✓ Timers within recommendations #23
    SOA refresh 8h, retry 2h, expire 21d, negative TTL 1h.
  • ✓ Primary is a public nameserver #24
    The primary nameserver ns.iacd.net is one of the listed nameservers.
  • ✓ Contact hostmaster@iacd.net #25
    The SOA RNAME hostmaster.iacd.net means hostmaster@iacd.net.
  • ✓ Date-based serial #26
    The serial 2026033102 follows the YYYYMMDDnn convention (2026-03-31).

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
217.113.33.130:53
TypeValueTTL
SOAns.iacd.net. hostmaster.iacd.net. 2026033102 28800 7200 1814400 36003600
NSns2.iacd.net.3600
NSns.iacd.net.3600
NSns3.knipp.de.3600
A217.113.44.2423600
MX10 barracuda.iacd.net.3600
TXT"verifyvs=202302171316539c4c67219839517bc726891beb6b7714"3600
TXT"v=spf1 a:mail.daab.de ip4:80.70.184.100 include:spf.iacd.net include:spf.vegasystems.de ~all"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