bayreuth.de

Checked 21 October 2026, 21:36 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

ns0.tmt.de, ns3.tmt.de, ns4.tmt.de

Found

Parent zone
de
Delegation from
a.nic.de (194.0.0.53)
NS at the parent
ns0.tmt.de, ns3.tmt.de, ns4.tmt.de
NS in the zone
ns0.tmt.de, ns3.tmt.de, ns4.tmt.de
NameserverAddressesNetwork (AS)Glue
ns0.tmt.de217.145.97.43 2001:4dc8:100:3::97:43AS16316 TMT - TMT GmbH & Co. KG, DE AS16316 TMT - TMT GmbH & Co. KG, DE217.145.97.43 2001:4dc8:100:3::97:43
ns3.tmt.de95.216.148.1 2a01:4f9:c010:c0f::1AS24940 HETZNER-AS - Hetzner Online GmbH, DE AS24940 HETZNER-AS - Hetzner Online GmbH, DE95.216.148.1 2a01:4f9:c010:c0f::1
ns4.tmt.de217.145.99.3 2001:4dc8:100::99:3AS16316 TMT - TMT GmbH & Co. KG, DE AS16316 TMT - TMT GmbH & Co. KG, DE-

Checks

  • ✓ 3 nameservers #6
    Delegated to ns0.tmt.de, ns3.tmt.de, ns4.tmt.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 2 IPv6 /48s.
  • ✓ 2 autonomous systems #11
    The nameservers are spread over: AS16316 (TMT - TMT GmbH & Co. KG, DE): 4 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

6 of 6 addresses answer authoritatively

Found

NameserverAnswerRecursionTCP / EDNSAXFRVersion
ns0.tmt.de 217.145.97.43NOERROR, 15 ms, authoritativenoyes / yesrefused9.18.49-1~deb12u2-Debian
ns0.tmt.de 2001:4dc8:100:3::97:43NOERROR, 15 ms, authoritativenoyes / yesrefused9.18.49-1~deb12u2-Debian
ns3.tmt.de 95.216.148.1NOERROR, 27 ms, authoritativenoyes / yesrefused9.18.49-1~deb12u2-Debian
ns3.tmt.de 2a01:4f9:c010:c0f::1NOERROR, 27 ms, authoritativenoyes / yesrefused9.18.49-1~deb12u2-Debian
ns4.tmt.de 217.145.99.3NOERROR, 14 ms, authoritativenoyes / yesrefused9.18.49-1~deb12u2-Debian
ns4.tmt.de 2001:4dc8:100::99:3NOERROR, 15 ms, authoritativenoyes / yesrefused9.18.49-1~deb12u2-Debian

Checks

  • ✓ All respond #14
    All 6 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: ns0.tmt.de: "9.18.49-1~deb12u2-Debian"; ns3.tmt.de: "9.18.49-1~deb12u2-Debian"; ns4.tmt.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 2026023746 · primary ns0.tmt.de

Found

Primary (MNAME)
ns0.tmt.de
Contact (RNAME)
hostmaster.ns0.tmt.de
Serial
2026023746
Refresh / retry
28800 s / 7200 s
Expire
604800 s
Negative TTL
3600 s

Serial per nameserver

NameserverSerial
ns0.tmt.de (217.145.97.43)2026023746
ns0.tmt.de (2001:4dc8:100:3::97:43)2026023746
ns3.tmt.de (95.216.148.1)2026023746
ns3.tmt.de (2a01:4f9:c010:c0f::1)2026023746
ns4.tmt.de (217.145.99.3)2026023746
ns4.tmt.de (2001:4dc8:100::99:3)2026023746

Checks

  • ✓ Serial 2026023746 everywhere #22
    All nameservers serve the same version of the zone.
  • ✓ Timers within recommendations #23
    SOA refresh 8h, retry 2h, expire 7d, negative TTL 1h.
  • ✓ Primary is a public nameserver #24
    The primary nameserver ns0.tmt.de is one of the listed nameservers.
  • ✓ Contact hostmaster@ns0.tmt.de #25
    The SOA RNAME hostmaster.ns0.tmt.de means hostmaster@ns0.tmt.de.
  • ✓ Timestamp serial #26
    The serial 2026023746 is a Unix timestamp (2034-03-15 08:22 UTC).

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

9 records at the apex

Found

Read from
217.145.97.43:53
TypeValueTTL
SOAns0.tmt.de. hostmaster.ns0.tmt.de. 2026023746 28800 7200 604800 360086400
NSns4.tmt.de.3600
NSns3.tmt.de.3600
NSns0.tmt.de.3600
A217.145.107.753600
MX10 mx.tmt.de.3600
TXT"google-site-verification=zQAwlcLvSwvN9SZNyUamWqYpHOoZ-uddUikvSuE4Ofo"86400
TXT"v=spf1 ip4:217.145.96.0/22 ip6:2001:4dc8:100::99:61 ip6:2001:4dc8:100::99:62 include:_nl.relay.tmt.de include:_web.relay.tmt.de ~all"86400
TXT"cbbvq286lpntxy6lg4j9w2w48tl1p36l"86400

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