herrenberg.de

Checked 21 October 2026, 22:50 UTC · via 8.8.8.8
!Passed with warnings
19 passed 4 warnings 0 failed 6 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

ns.ki.tng.de, ns.tng.de

Found

Parent zone
de
Delegation from
a.nic.de (194.0.0.53)
NS at the parent
ns.ki.tng.de, ns.tng.de
NS in the zone
ns.ki.tng.de, ns.tng.de
NameserverAddressesNetwork (AS)Glue
ns.ki.tng.de213.178.64.2AS13101 TNG-AS - TNG Stadtnetz GmbH, DE-
ns.tng.de213.178.66.2AS13101 TNG-AS - TNG Stadtnetz GmbH, DE-

Checks

  • i
    2 nameservers
    Two nameservers meet the minimum; RFC 2182 recommends three or more for important zones: ns.ki.tng.de, ns.tng.de.
    #6
  • ✓ 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.
  • i
    All nameservers in one AS
    All nameserver addresses are announced by one network operator (AS13101 (TNG-AS - TNG Stadtnetz 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
ns.ki.tng.de 213.178.64.2NOERROR, 12 ms, authoritativenoyes / yesrefused9.10.3-P4-Ubuntu
ns.tng.de 213.178.66.2NOERROR, 14 ms, authoritativenoyes / yesrefused8.4.7-REL-NOESW

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: ns.ki.tng.de: "9.10.3-P4-Ubuntu"; ns.tng.de: "8.4.7-REL-NOESW". 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

warn

serial 2026090701 · primary ns.tng.de

Found

Primary (MNAME)
ns.tng.de
Contact (RNAME)
hostmaster.tng.de
Serial
2026090701
Refresh / retry
7200 s / 7200 s
Expire
604800 s
Negative TTL
86400 s

Serial per nameserver

NameserverSerial
ns.ki.tng.de (213.178.64.2)2026090701
ns.tng.de (213.178.66.2)2026090701

Checks

  • ✓ Serial 2026090701 everywhere #22
    All nameservers serve the same version of the zone.
  • !
    Unusual SOA timers
    retry 2h should be shorter than refresh 2h. Current values: refresh 2h, retry 2h, expire 7d, negative TTL 1d.
    #23
  • ✓ Primary is a public nameserver #24
    The primary nameserver ns.tng.de is one of the listed nameservers.
  • ✓ Contact hostmaster@tng.de #25
    The SOA RNAME hostmaster.tng.de means hostmaster@tng.de.
  • ✓ Date-based serial #26
    The serial 2026090701 follows the YYYYMMDDnn convention (2026-09-07).

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

16 records at the apex

Found

Read from
213.178.64.2:53
TypeValueTTL
SOAns.tng.de. hostmaster.tng.de. 2026090701 7200 7200 604800 86400300
NSns.tng.de.300
NSns.ki.tng.de.300
A134.119.0.30300
AAAA2a00:116a:104:9210::300
MX1 mx7.kvnbw.de.300
MX1 mx9.kvnbw.de.300
MX1 mx6.kvnbw.de.300
MX1 mx8.kvnbw.de.300
TXT"swisssign-check=BSji4SHqak-gO5c1Te6A6GtCyYU"300
TXT"brevo-code:c3c808968215f60447f873e5b06948dc"300
TXT"_globalsign-domain-verification=ykZfHomblQEATGrz7_5lRWSevcS_bbeTy2uDLGX2jA"300
TXT"MS=6D68BBDE35DDD17461DCA6F6E9E2F888F9B50EB1"300
TXT"brevo-code:8f4d8c45975a225550f7748c0c988b8a"300
TXT"apple-domain-verification=YpYO9KA2TUEEyHzY"300
TXT"v=spf1 ip4:84.246.120.160 ip4:134.119.0.30 ip4:195.243.76.130 ip4:134.119.86.148 ip4:195.189.93.165 ip4:195.189.93.166 ip4:185.15.192.56 ip6:2a00:1158:400:407::594 ip6:2a00:116a:104:9210:0:0:0:0" " ip4:134.119.0.41 ip4:134.119.228.53 ip4:185.15.192.57 ip4:185.224.154.50 ip4:37.202.1.53 ip4:84.246.120.140 include:spf.protect.kvnbw.de include:_spf.xurrent.com include:agenturserver.de include:spf.brevo.com include:indivsurvey.de -all"300

Checks

  • ✓ TTLs within range #32
    TTLs: A 5m, AAAA 5m, MX 5m, NS 5m. The NS TTL at the parent is 1d and in the zone 5m; 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