ihk-lehrstellenboerse.de

Checked 21 October 2026, 22:51 UTC · via 8.8.8.8
!Passed with warnings
22 passed 4 warnings 0 failed 3 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

ns1-35.azure-dns.com, ns2-35.azure-dns.net, ns3-35.azure-dns.org, ns4-35.azure-dns.info

Found

Parent zone
de
Delegation from
a.nic.de (194.0.0.53)
NS at the parent
ns1-35.azure-dns.com, ns2-35.azure-dns.net, ns3-35.azure-dns.org, ns4-35.azure-dns.info
NS in the zone
ns.second-ns.com, ns1-35.azure-dns.com, ns1.your-server.de, ns2-35.azure-dns.net, ns3-35.azure-dns.org, ns3.second-ns.de, ns4-35.azure-dns.info
NameserverAddressesNetwork (AS)Glue
ns.second-ns.com (zone only)213.239.204.242 2a01:4f8:0:a101::b:1AS24940 HETZNER-AS - Hetzner Online GmbH, DE AS24940 HETZNER-AS - Hetzner Online GmbH, DE-
ns1-35.azure-dns.com150.171.10.35 2603:1061:0:10::23AS8075 MICROSOFT-CORP-MSN-AS-BLOCK - Microsoft Corporation, US AS8075 MICROSOFT-CORP-MSN-AS-BLOCK - Microsoft Corporation, US-
ns1.your-server.de (zone only)213.133.100.102 2a01:4f8:0:1::5ddc:1AS24940 HETZNER-AS - Hetzner Online GmbH, DE AS24940 HETZNER-AS - Hetzner Online GmbH, DE-
ns2-35.azure-dns.net150.171.16.35 2620:1ec:8ec:10::23AS8075 MICROSOFT-CORP-MSN-AS-BLOCK - Microsoft Corporation, US AS8075 MICROSOFT-CORP-MSN-AS-BLOCK - Microsoft Corporation, US-
ns3-35.azure-dns.org13.107.222.35 2a01:111:4000:10::23AS8075 MICROSOFT-CORP-MSN-AS-BLOCK - Microsoft Corporation, US AS8075 MICROSOFT-CORP-MSN-AS-BLOCK - Microsoft Corporation, US-
ns3.second-ns.de (zone only)193.47.99.4 2001:67c:192c::add:b3AS12337 NORIS-NETWORK - noris network AG, DE AS12337 NORIS-NETWORK - noris network AG, DE-
ns4-35.azure-dns.info13.107.206.35 2620:1ec:bda:10::23AS8075 MICROSOFT-CORP-MSN-AS-BLOCK - Microsoft Corporation, US AS8075 MICROSOFT-CORP-MSN-AS-BLOCK - Microsoft Corporation, US-

Checks

  • ✓ 4 nameservers #6
    Delegated to ns1-35.azure-dns.com, ns2-35.azure-dns.net, ns3-35.azure-dns.org, ns4-35.azure-dns.info.
  • !
    NS sets differ
    The nameservers at the parent and in the zone should be the same. Only in the zone: ns.second-ns.com, ns1.your-server.de, ns3.second-ns.de. ns.second-ns.com, ns1.your-server.de, ns3.second-ns.de report NS ns.second-ns.com ns1.your-server.de ns3.second-ns.de. ns1-35.azure-dns.com, ns2-35.azure-dns.net, ns3-35.azure-dns.org, ns4-35.azure-dns.info report NS ns.second-ns.com ns1-35.azure-dns.com ns1.your-server.de ns2-35.azure-dns.net ns3-35.azure-dns.org ns3.second-ns.de ns4-35.azure-dns.info.
    #7
  • ✓ 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 7 IPv4 /24s and 6 IPv6 /48s.
  • ✓ 3 autonomous systems #11
    The nameservers are spread over: AS12337 (NORIS-NETWORK - noris network AG, DE): 2 addresses; AS24940 (HETZNER-AS - Hetzner Online GmbH, DE): 4 addresses; AS8075 (MICROSOFT-CORP-MSN-AS-BLOCK - Microsoft Corporation, US): 8 addresses.
  • ✓ Nameserver names under 4 TLDs #12
    Nameserver names use the TLDs .com, .info, .net, .org.
  • ✓ All reachable over IPv6 #13
    Every nameserver has an IPv6 address.

Nameservers

warn

14 of 14 addresses answer authoritatively

Found

NameserverAnswerRecursionTCP / EDNSAXFRVersion
ns.second-ns.com 213.239.204.242NOERROR, 3 ms, authoritativenoyes / yesrefused-
ns.second-ns.com 2a01:4f8:0:a101::b:1NOERROR, 3 ms, authoritativenoyes / yesrefused-
ns1-35.azure-dns.com 150.171.10.35NOERROR, 4 ms, authoritativenoyes / yesrefused-
ns1-35.azure-dns.com 2603:1061:0:10::23NOERROR, 4 ms, authoritativenoyes / yesrefused-
ns1.your-server.de 213.133.100.102NOERROR, 0 ms, authoritativenoyes / yesrefused-
ns1.your-server.de 2a01:4f8:0:1::5ddc:1NOERROR, 0 ms, authoritativenoyes / yesrefused-
ns2-35.azure-dns.net 150.171.16.35NOERROR, 4 ms, authoritativenoyes / yesrefusedKnot DNS 3.1.2.1770717641.d6b376aff
ns2-35.azure-dns.net 2620:1ec:8ec:10::23NOERROR, 4 ms, authoritativenoyes / yesrefused-
ns3-35.azure-dns.org 13.107.222.35NOERROR, 4 ms, authoritativenoyes / yesrefused-
ns3-35.azure-dns.org 2a01:111:4000:10::23NOERROR, 4 ms, authoritativenoyes / yesrefused-
ns3.second-ns.de 193.47.99.4NOERROR, 5 ms, authoritativenoyes / yesrefused-
ns3.second-ns.de 2001:67c:192c::add:b3NOERROR, 5 ms, authoritativenoyes / yesrefused-
ns4-35.azure-dns.info 13.107.206.35NOERROR, 4 ms, authoritativenoyes / yesrefusedKnot DNS 3.1.2.1770717641.d6b376aff
ns4-35.azure-dns.info 2620:1ec:bda:10::23NOERROR, 4 ms, authoritativenoyes / yesrefused-

Checks

  • ✓ All respond #14
    All 14 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: ns2-35.azure-dns.net: "Knot DNS 3.1.2.1770717641.d6b376aff"; ns4-35.azure-dns.info: "Knot DNS 3.1.2.1770717641.d6b376aff". 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 2026011500 · primary ns1.your-server.de

Found

Primary (MNAME)
ns1.your-server.de
Contact (RNAME)
postmaster.your-server.de
Serial
2026011500
Refresh / retry
86400 s / 10800 s
Expire
3600000 s
Negative TTL
3600 s

Serial per nameserver

NameserverSerial
ns.second-ns.com (213.239.204.242)2026011500
ns.second-ns.com (2a01:4f8:0:a101::b:1)2026011500
ns1-35.azure-dns.com (150.171.10.35)1
ns1-35.azure-dns.com (2603:1061:0:10::23)1
ns1.your-server.de (213.133.100.102)2026011500
ns1.your-server.de (2a01:4f8:0:1::5ddc:1)2026011500
ns2-35.azure-dns.net (150.171.16.35)1
ns2-35.azure-dns.net (2620:1ec:8ec:10::23)1
ns3-35.azure-dns.org (13.107.222.35)1
ns3-35.azure-dns.org (2a01:111:4000:10::23)1
ns3.second-ns.de (193.47.99.4)2026011500
ns3.second-ns.de (2001:67c:192c::add:b3)2026011500
ns4-35.azure-dns.info (13.107.206.35)1
ns4-35.azure-dns.info (2620:1ec:bda:10::23)1

Checks

  • !
    Serials differ
    The nameservers serve different versions of the zone: 1 on ns1-35.azure-dns.com (150.171.10.35), ns1-35.azure-dns.com (2603:1061:0:10::23), ns2-35.azure-dns.net (150.171.16.35), ns2-35.azure-dns.net (2620:1ec:8ec:10::23), ns3-35.azure-dns.org (13.107.222.35), ns3-35.azure-dns.org (2a01:111:4000:10::23), ns4-35.azure-dns.info (13.107.206.35), ns4-35.azure-dns.info (2620:1ec:bda:10::23); 2026011500 on ns.second-ns.com (213.239.204.242), ns.second-ns.com (2a01:4f8:0:a101::b:1), ns1.your-server.de (213.133.100.102), ns1.your-server.de (2a01:4f8:0:1::5ddc:1), ns3.second-ns.de (193.47.99.4), ns3.second-ns.de (2001:67c:192c::add:b3). This is normal for a few minutes after a change; if it lasts, zone transfers to the secondaries are failing.
    #22
  • ✓ Timers within recommendations #23
    SOA refresh 1d, retry 3h, expire 1000h, negative TTL 1h.
  • ✓ Primary is a public nameserver #24
    The primary nameserver ns1.your-server.de is one of the listed nameservers.
  • ✓ Contact postmaster@your-server.de #25
    The SOA RNAME postmaster.your-server.de means postmaster@your-server.de.
  • ✓ Date-based serial #26
    The serial 2026011500 follows the YYYYMMDDnn convention (2026-01-15).

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
213.239.204.242:53
TypeValueTTL
SOAns1.your-server.de. postmaster.your-server.de. 2026011500 86400 10800 3600000 36007200
NSns3.second-ns.de.7200
NSns.second-ns.com.7200
NSns1.your-server.de.7200
A136.243.167.707200
AAAA2a01:4f8:d0a:6246::27200
MX10 dedi5133.your-server.de.7200
TXT"v=spf1 +a +mx ?all"7200

Checks

  • ✓ TTLs within range #32
    TTLs: A 2h, AAAA 2h, MX 2h, NS 2h. The NS TTL at the parent is 1d and in the zone 2h; 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