ph-ludwigsburg.de

Checked 21 October 2026, 23:50 UTC · via 8.8.8.8
!Passed with warnings
22 passed 2 warnings 0 failed 5 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.belwue.de, dns3.belwue.de, dns5.belwue.de, ns1.campus-lb.net, ns2.campus-lb.net

Found

Parent zone
de
Delegation from
a.nic.de (194.0.0.53)
NS at the parent
dns1.belwue.de, dns3.belwue.de, dns5.belwue.de, ns1.campus-lb.net, ns2.campus-lb.net
NS in the zone
dns1.belwue.de, dns3.belwue.de, dns5.belwue.de, ns1.campus-lb.net, ns2.campus-lb.net
NameserverAddressesNetwork (AS)Glue
dns1.belwue.de129.143.2.10 2001:7c0::53:10AS553 BELWUE - Universitaet Stuttgart, DE AS553 BELWUE - Universitaet Stuttgart, DE129.143.2.10 2001:7c0::53:10
dns3.belwue.de129.143.253.133 2001:7c0:0:253::133AS553 BELWUE - Universitaet Stuttgart, DE AS553 BELWUE - Universitaet Stuttgart, DE129.143.253.133 2001:7c0:0:253::133
dns5.belwue.de129.143.4.5 2001:7c0::53:5AS553 BELWUE - Universitaet Stuttgart, DE AS553 BELWUE - Universitaet Stuttgart, DE129.143.4.5 2001:7c0::53:5
ns1.campus-lb.net193.196.151.98AS553 BELWUE - Universitaet Stuttgart, DE-
ns2.campus-lb.net178.63.198.182AS24940 HETZNER-AS - Hetzner Online GmbH, DE-

Checks

  • ✓ 5 nameservers #6
    Delegated to dns1.belwue.de, dns3.belwue.de, dns5.belwue.de, ns1.campus-lb.net, ns2.campus-lb.net.
  • ✓ 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.
  • i
    One address family in one network
    all IPv6 addresses are in 2001:7c0::/48, while the other address family is spread over several networks.
    #10
  • ✓ 2 autonomous systems #11
    The nameservers are spread over: AS24940 (HETZNER-AS - Hetzner Online GmbH, DE): 1 address; AS553 (BELWUE - Universitaet Stuttgart, DE): 7 addresses.
  • ✓ Nameserver names under 2 TLDs #12
    Nameserver names use the TLDs .de, .net.
  • i
    Partly IPv6
    These nameservers have no IPv6 address: ns1.campus-lb.net, ns2.campus-lb.net.
    #13

Nameservers

warn

8 of 8 addresses answer authoritatively

Found

NameserverAnswerRecursionTCP / EDNSAXFRVersion
dns1.belwue.de 129.143.2.10NOERROR, 107 ms, authoritativenoyes / yesrefusedPowerDNS Authoritative Server 4.5.5 (built Dec 8 2022 18:24:18 by root@a309361b6303)
dns1.belwue.de 2001:7c0::53:10NOERROR, 7 ms, authoritativenoyes / yesrefusedPowerDNS Authoritative Server 4.5.5 (built Dec 8 2022 18:24:18 by root@a309361b6303)
dns3.belwue.de 129.143.253.133NOERROR, 7 ms, authoritativenoyes / yesrefusedPowerDNS Authoritative Server 4.5.5 (built Dec 8 2022 18:24:18 by root@a309361b6303)
dns3.belwue.de 2001:7c0:0:253::133NOERROR, 7 ms, authoritativenoyes / yesrefusedPowerDNS Authoritative Server 4.5.5 (built Dec 8 2022 18:24:18 by root@a309361b6303)
dns5.belwue.de 129.143.4.5NOERROR, 7 ms, authoritativenoyes / yesrefusedPowerDNS Authoritative Server 4.5.5 (built Dec 8 2022 18:24:18 by root@a309361b6303)
dns5.belwue.de 2001:7c0::53:5NOERROR, 7 ms, authoritativenoyes / yesrefusedPowerDNS Authoritative Server 4.5.5 (built Dec 8 2022 18:24:18 by root@a309361b6303)
ns1.campus-lb.net 193.196.151.98NOERROR, 8 ms, authoritativenoyes / yesrefused9.20.23-1~deb13u1-Debian
ns2.campus-lb.net 178.63.198.182NOERROR, 4 ms, authoritativenoyes / yesrefused9.20.15-1~deb13u1-Debian

Checks

  • ✓ All respond #14
    All 8 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.belwue.de: "PowerDNS Authoritative Server 4.5.5 (built Dec 8 2022 18:24:18 by root@a309361b6303)"; dns3.belwue.de: "PowerDNS Authoritative Server 4.5.5 (built Dec 8 2022 18:24:18 by root@a309361b6303)"; dns5.belwue.de: "PowerDNS Authoritative Server 4.5.5 (built Dec 8 2022 18:24:18 by root@a309361b6303)"; ns1.campus-lb.net: "9.20.23-1~deb13u1-Debian"; ns2.campus-lb.net: "9.20.15-1~deb13u1-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 2026102101 · primary ns1.campus-lb.net

Found

Primary (MNAME)
ns1.campus-lb.net
Contact (RNAME)
mit.campus-lb.de
Serial
2026102101
Refresh / retry
21600 s / 1800 s
Expire
2419200 s
Negative TTL
86400 s

Serial per nameserver

NameserverSerial
dns1.belwue.de (129.143.2.10)2026102101
dns1.belwue.de (2001:7c0::53:10)2026102101
dns3.belwue.de (129.143.253.133)2026102101
dns3.belwue.de (2001:7c0:0:253::133)2026102101
dns5.belwue.de (129.143.4.5)2026102101
dns5.belwue.de (2001:7c0::53:5)2026102101
ns1.campus-lb.net (193.196.151.98)2026102101
ns2.campus-lb.net (178.63.198.182)2026102101

Checks

  • ✓ Serial 2026102101 everywhere #22
    All nameservers serve the same version of the zone.
  • ✓ Timers within recommendations #23
    SOA refresh 6h, retry 30m, expire 28d, negative TTL 1d.
  • ✓ Primary is a public nameserver #24
    The primary nameserver ns1.campus-lb.net is one of the listed nameservers.
  • ✓ Contact mit@campus-lb.de #25
    The SOA RNAME mit.campus-lb.de means mit@campus-lb.de.
  • ✓ Date-based serial #26
    The serial 2026102101 follows the YYYYMMDDnn convention (2026-10-21).

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

19 records at the apex

Found

Read from
129.143.2.10:53
TypeValueTTL
SOAns1.campus-lb.net. mit.campus-lb.de. 2026102101 21600 1800 2419200 864003600
NSdns3.belwue.de.3600
NSdns1.belwue.de.3600
NSdns5.belwue.de.3600
NSns1.campus-lb.net.3600
NSns2.campus-lb.net.3600
A193.196.151.2033600
MX10 mailgw05.campus-lb.net.3600
MX10 mailgw04.campus-lb.net.3600
TXT"Paedagogische Hochschule Ludwigsburg"3600
TXT"v=spf1 include:_spf.belwue.de ~all"3600
TXT"MS=41C4DB5F364E3CD97644E21141E547F641A1E654"3600
TXT"HARICA-uRMQFbQGPKczB9uE5Jl"3600
TXT"google-site-verification=mFHhQ0yphDOkPuG4MVD49NZNlhI1qOukds-8l7URi8Y"3600
TXT"google-site-verification=hRrz8CzLyk5niyoNMgAvrPS_Q2WMGplZY3HArFUYzuY"3600
TXT"cisco-ci-domain-verification=6169e7cd42411a57d02950bb2f4f35e0cbcccd8545e735ef0ec44d47a0b34d6"3600
TXT"MEV1RZS1U77VE394U79KKCUX70FVT9AY5YLX5KOA"3600
TXT"apple-domain-verification=iR0HCDxQd8cnFNrR"3600
TXT"adobe-idp-site-verification=06a581292b2252912ad56efaa70ee92cb762f6ac4e0079c175ad6bb53bc6363c"3600

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