drks.de

Checked 21 October 2026, 22:15 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

warn

ns03.versatel.de, ns1.dimdi.de, ns2.dimdi.de

Found

Parent zone
de
Delegation from
a.nic.de (194.0.0.53)
NS at the parent
ns03.versatel.de, ns1.dimdi.de, ns2.dimdi.de
NS in the zone
ns03.versatel.de, ns1.dimdi.de, ns2.dimdi.de
NameserverAddressesNetwork (AS)Glue
ns03.versatel.de193.219.15.17AS8881 VERSATEL - 1&1 Versatel GmbH, DE193.219.15.17
ns1.dimdi.de194.153.219.2AS6733 BfArM - Bundesinstitut fuer Arzneimittel und Medizinprodukte (BfArM), DE194.153.219.2
ns2.dimdi.de194.153.219.22AS6733 BfArM - Bundesinstitut fuer Arzneimittel und Medizinprodukte (BfArM), DE-

Checks

  • ✓ 3 nameservers #6
    Delegated to ns03.versatel.de, ns1.dimdi.de, ns2.dimdi.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 2 IPv4 /24s and 0 IPv6 /48s.
  • ✓ 2 autonomous systems #11
    The nameservers are spread over: AS6733 (BfArM - Bundesinstitut fuer Arzneimittel und Medizinprodukte (BfArM), DE): 2 addresses; AS8881 (VERSATEL - 1&1 Versatel 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
  • !
    No IPv6
    None of the nameservers has an IPv6 address, so IPv6-only resolvers can't reach them.
    #13

Nameservers

warn

3 of 3 addresses answer authoritatively

Found

NameserverAnswerRecursionTCP / EDNSAXFRVersion
ns03.versatel.de 193.219.15.17NOERROR, 13 ms, authoritativenoyes / yesrefusedNo version info available (refused).
ns1.dimdi.de 194.153.219.2NOERROR, 10 ms, authoritativenoyes / yesrefused9.18.49-1~deb12u2-Debian
ns2.dimdi.de 194.153.219.22NOERROR, 9 ms, authoritativenoyes / yesrefused9.18.49-1~deb12u2-Debian

Checks

  • ✓ All respond #14
    All 3 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.dimdi.de: "9.18.49-1~deb12u2-Debian"; ns2.dimdi.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

pass

serial 2026100100 · primary ns1.dimdi.de

Found

Primary (MNAME)
ns1.dimdi.de
Contact (RNAME)
hostmaster.bfarm.de
Serial
2026100100
Refresh / retry
10800 s / 3600 s
Expire
604800 s
Negative TTL
86400 s

Serial per nameserver

NameserverSerial
ns03.versatel.de (193.219.15.17)2026100100
ns1.dimdi.de (194.153.219.2)2026100100
ns2.dimdi.de (194.153.219.22)2026100100

Checks

  • ✓ Serial 2026100100 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.
  • ✓ Primary is a public nameserver #24
    The primary nameserver ns1.dimdi.de is one of the listed nameservers.
  • ✓ Contact hostmaster@bfarm.de #25
    The SOA RNAME hostmaster.bfarm.de means hostmaster@bfarm.de.
  • ✓ Date-based serial #26
    The serial 2026100100 follows the YYYYMMDDnn convention (2026-10-01).

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

14 records at the apex

Found

Read from
193.219.15.17:53
TypeValueTTL
SOAns1.dimdi.de. hostmaster.bfarm.de. 2026100100 10800 3600 604800 8640010800
NSns03.versatel.de.10800
NSns2.dimdi.de.10800
NSns1.dimdi.de.10800
A194.153.219.661800
MX10 srv03mailgw.dimdi.de.800
MX10 srv04mailgw.dimdi.de.800
TXT"HARICA-OnolAp66fcx9XLrX0yQ"1800
TXT"google-site-verification=iV6bivZ_VEKMxF7y7c136LSIEexVSLnQSB03vhwK8zg"1800
TXT"v=spf1 mx ip4:192.124.251.24 ip4:192.124.251.25 ~all"1800
CAA0 issue "pki.dfn.de"10800
CAA0 issue "harica.gr"10800
CAA0 iodef "mailto:IT-Sicherheitsmanagement@bfarm.de"10800
CAA0 issue "sectigo.com"10800

Checks

  • ✓ TTLs within range #32
    TTLs: A 30m, MX 13m20s, NS 3h. The NS TTL at the parent is 1d and in the zone 3h; resolvers may use either.
  • ✓ No CNAME at the apex #33
    The zone apex has no CNAME record.
  • i
    Wildcard record
    A random name under the zone resolves, so there is a wildcard (*) record. Typos and non-existent hosts resolve too, which can confuse mail and certificate checks.
    #34
  • ✓ CAA restricts issuance #35
    Certificates may be issued by: pki.dfn.de, harica.gr, sectigo.com.