steinbeis.de

Checked 22 October 2026, 00:30 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

ns.indas.de, ns.ludwigsburg.net

Found

Parent zone
de
Delegation from
a.nic.de (194.0.0.53)
NS at the parent
ns.indas.de, ns.ludwigsburg.net
NS in the zone
ns.indas.de, ns.ludwigsburg.net
NameserverAddressesNetwork (AS)Glue
ns.indas.de185.226.172.124AS136258 ONEPROVIDER-AS - BrainStorm Network, Inc, CA185.226.172.124
ns.ludwigsburg.net20.56.148.105AS8075 MICROSOFT-CORP-MSN-AS-BLOCK - Microsoft Corporation, US-

Checks

  • i
    2 nameservers
    Two nameservers meet the minimum; RFC 2182 recommends three or more for important zones: ns.indas.de, ns.ludwigsburg.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 0 IPv6 /48s.
  • ✓ 2 autonomous systems #11
    The nameservers are spread over: AS136258 (ONEPROVIDER-AS - BrainStorm Network, Inc, CA): 1 address; AS8075 (MICROSOFT-CORP-MSN-AS-BLOCK - Microsoft Corporation, US): 1 address.
  • ✓ Nameserver names under 2 TLDs #12
    Nameserver names use the TLDs .de, .net.
  • !
    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.indas.de 185.226.172.124NOERROR, 3 ms, authoritativenoyes / yesrefusedPowerDNS Authoritative Server 4.4.1
ns.ludwigsburg.net 20.56.148.105NOERROR, 15 ms, authoritativenoyes / yesrefused9.16.50-Debian

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.indas.de: "PowerDNS Authoritative Server 4.4.1"; ns.ludwigsburg.net: "9.16.50-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 1666886018 · primary ns.indas.de

Found

Primary (MNAME)
ns.indas.de
Contact (RNAME)
hostmaster.steinbeis.de
Serial
1666886018
Refresh / retry
16384 s / 2048 s
Expire
1048576 s
Negative TTL
2560 s

Serial per nameserver

NameserverSerial
ns.indas.de (185.226.172.124)1666886018
ns.ludwigsburg.net (20.56.148.105)1666886018

Checks

  • ✓ Serial 1666886018 everywhere #22
    All nameservers serve the same version of the zone.
  • ✓ Timers within recommendations #23
    SOA refresh 4h33m4s, retry 34m8s, expire 291h16m16s, negative TTL 42m40s.
  • ✓ Primary is a public nameserver #24
    The primary nameserver ns.indas.de is one of the listed nameservers.
  • ✓ Contact hostmaster@steinbeis.de #25
    The SOA RNAME hostmaster.steinbeis.de means hostmaster@steinbeis.de.
  • ✓ Timestamp serial #26
    The serial 1666886018 is a Unix timestamp (2022-10-27 15:53 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
185.226.172.124:53
TypeValueTTL
SOAns.indas.de. hostmaster.steinbeis.de. 1666886018 16384 2048 1048576 25602560
NSns.ludwigsburg.net.86400
NSns.indas.de.259200
A185.226.172.46300
MX5 mail.stw.de.3600
TXT"6ygEUURKwqDycDUrjM+9rVZerLVgaWWWM+Uhystfe0S4Vph2G8ipo+IxP8s/gUzEDTBXzWkMXfiAdGpxDO14KA=="3600
TXT"MS=ms97129311"1800
TXT"google-site-verification=mmELUEu307buW-MMhZSB5zrRvLSdm54uI_j-chz7gCs"3600
TXT"v=spf1 mx a include:spf.stw.de include:spf.nl2go.com include:spf.protection.outlook.com -all"3600

Checks

  • ✓ TTLs within range #32
    TTLs: A 5m, MX 1h, NS 1d.
  • ✓ 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