i2p2.de

Checked 21 October 2026, 22:51 UTC · via 8.8.8.8
!Passed with warnings
21 passed 2 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

info

dns1.dedus0.airmass1.net, dns3.denue3.conemu.net

Found

Parent zone
de
Delegation from
a.nic.de (194.0.0.53)
NS at the parent
dns1.dedus0.airmass1.net, dns3.denue3.conemu.net
NS in the zone
dns1.dedus0.airmass1.net, dns3.denue3.conemu.net
NameserverAddressesNetwork (AS)Glue
dns1.dedus0.airmass1.net80.83.124.216 2a02:e00:ffec:7ea::3AS29141 BKVG-AS - Bradler & Krantz GmbH & Co. KG, DE AS29141 BKVG-AS - Bradler & Krantz GmbH & Co. KG, DE-
dns3.denue3.conemu.net213.95.207.38 2001:780:26b:ff00::38AS12337 NORIS-NETWORK - noris network AG, DE AS12337 NORIS-NETWORK - noris network AG, DE-

Checks

  • i
    2 nameservers
    Two nameservers meet the minimum; RFC 2182 recommends three or more for important zones: dns1.dedus0.airmass1.net, dns3.denue3.conemu.net.
    #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 2 IPv6 /48s.
  • ✓ 2 autonomous systems #11
    The nameservers are spread over: AS12337 (NORIS-NETWORK - noris network AG, DE): 2 addresses; AS29141 (BKVG-AS - Bradler & Krantz GmbH & Co. KG, DE): 2 addresses.
  • i
    All nameserver names under .net
    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

4 of 4 addresses answer authoritatively

Found

NameserverAnswerRecursionTCP / EDNSAXFRVersion
dns1.dedus0.airmass1.net 80.83.124.216NOERROR, 13 ms, authoritativenoyes / yesrefusedNSD 4.6.1
dns1.dedus0.airmass1.net 2a02:e00:ffec:7ea::3NOERROR, 14 ms, authoritativenoyes / yesrefusedNSD 4.6.1
dns3.denue3.conemu.net 213.95.207.38NOERROR, 4 ms, authoritativenoyes / yesrefusedNSD 4.6.1
dns3.denue3.conemu.net 2001:780:26b:ff00::38NOERROR, 4 ms, authoritativenoyes / yesrefusedNSD 4.6.1

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: dns1.dedus0.airmass1.net: "NSD 4.6.1"; dns3.denue3.conemu.net: "NSD 4.6.1". 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

info

serial 2024011200 · primary ns3.welterde.de

Found

Primary (MNAME)
ns3.welterde.de
Contact (RNAME)
hostmaster.welterde.de
Serial
2024011200
Refresh / retry
86400 s / 3600 s
Expire
2419200 s
Negative TTL
86400 s

Serial per nameserver

NameserverSerial
dns1.dedus0.airmass1.net (80.83.124.216)2024011200
dns1.dedus0.airmass1.net (2a02:e00:ffec:7ea::3)2024011200
dns3.denue3.conemu.net (213.95.207.38)2024011200
dns3.denue3.conemu.net (2001:780:26b:ff00::38)2024011200

Checks

  • ✓ Serial 2024011200 everywhere #22
    All nameservers serve the same version of the zone.
  • ✓ Timers within recommendations #23
    SOA refresh 1d, retry 1h, expire 28d, negative TTL 1d.
  • i
    Hidden master
    The primary nameserver ns3.welterde.de is not listed as a nameserver: a hidden master that only feeds the public secondaries. That is a common setup; make sure it is not reachable for zone transfers from outside.
    #24
  • ✓ Contact hostmaster@welterde.de #25
    The SOA RNAME hostmaster.welterde.de means hostmaster@welterde.de.
  • ✓ Date-based serial #26
    The serial 2024011200 follows the YYYYMMDDnn convention (2024-01-12).

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

6 records at the apex

Found

Read from
80.83.124.216:53
TypeValueTTL
SOAns3.welterde.de. hostmaster.welterde.de. 2024011200 86400 3600 2419200 86400600
NSdns1.dedus0.airmass1.net.600
NSdns3.denue3.conemu.net.600
A81.7.7.63600
AAAA2a02:180:2:c1:81:7:7:63600
MX10 mail.i2pproject.net.600

Checks

  • ✓ TTLs within range #32
    TTLs: A 10m, AAAA 10m, MX 10m, NS 10m. The NS TTL at the parent is 1d and in the zone 10m; 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