uka.de

Checked 22 October 2026, 00:50 UTC · via 8.8.8.8
!Passed with warnings
24 passed 2 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

pass

ns-p-1.kit-dns.eu, ns-p-2.kit-dns.de, ns-p-3.kit-dns.net

Found

Parent zone
de
Delegation from
a.nic.de (194.0.0.53)
NS at the parent
ns-p-1.kit-dns.eu, ns-p-2.kit-dns.de, ns-p-3.kit-dns.net
NS in the zone
ns-p-1.kit-dns.eu, ns-p-2.kit-dns.de, ns-p-3.kit-dns.net
NameserverAddressesNetwork (AS)Glue
ns-p-1.kit-dns.eu185.237.152.53 2001:678:da0::53AS213068 KIT-ANYCAST - Karlsruhe Institute of Technology, DE AS213068 KIT-ANYCAST - Karlsruhe Institute of Technology, DE-
ns-p-2.kit-dns.de185.237.153.53 2001:678:da4::53AS213068 KIT-ANYCAST - Karlsruhe Institute of Technology, DE AS213068 KIT-ANYCAST - Karlsruhe Institute of Technology, DE185.237.153.53 2001:678:da4::53
ns-p-3.kit-dns.net141.52.0.53 2a00:139f:e::53AS34878 KIT - Karlsruhe Institute of Technology, DE AS34878 KIT - Karlsruhe Institute of Technology, DE-

Checks

  • ✓ 3 nameservers #6
    Delegated to ns-p-1.kit-dns.eu, ns-p-2.kit-dns.de, ns-p-3.kit-dns.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.
  • ✓ Nameservers in different networks #10
    The nameservers are spread over 3 IPv4 /24s and 3 IPv6 /48s.
  • ✓ 2 autonomous systems #11
    The nameservers are spread over: AS213068 (KIT-ANYCAST - Karlsruhe Institute of Technology, DE): 4 addresses; AS34878 (KIT - Karlsruhe Institute of Technology, DE): 2 addresses.
  • ✓ Nameserver names under 3 TLDs #12
    Nameserver names use the TLDs .de, .eu, .net.
  • ✓ All reachable over IPv6 #13
    Every nameserver has an IPv6 address.

Nameservers

warn

6 of 6 addresses answer authoritatively

Found

NameserverAnswerRecursionTCP / EDNSAXFRVersion
ns-p-1.kit-dns.eu 185.237.152.53NOERROR, 10 ms, authoritativenoyes / yesrefusedPowerDNS Authoritative Server 4.9.17 (built Aug 5 2026 13:27:53 by root@localhost)
ns-p-1.kit-dns.eu 2001:678:da0::53NOERROR, 11 ms, authoritativenoyes / yesrefusedPowerDNS Authoritative Server 4.9.17 (built Aug 5 2026 13:27:53 by root@localhost)
ns-p-2.kit-dns.de 185.237.153.53NOERROR, 10 ms, authoritativenoyes / yesrefusedPowerDNS Authoritative Server 4.9.17 (built Aug 5 2026 13:27:53 by root@localhost)
ns-p-2.kit-dns.de 2001:678:da4::53NOERROR, 10 ms, authoritativenoyes / yesrefusedPowerDNS Authoritative Server 4.9.17 (built Aug 5 2026 13:27:53 by root@localhost)
ns-p-3.kit-dns.net 141.52.0.53NOERROR, 6 ms, authoritativenoyes / yesrefusedPowerDNS Authoritative Server 4.9.17 (built Aug 5 2026 13:27:53 by root@localhost)
ns-p-3.kit-dns.net 2a00:139f:e::53NOERROR, 6 ms, authoritativenoyes / yesrefusedPowerDNS Authoritative Server 4.9.17 (built Aug 5 2026 13:27:53 by root@localhost)

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: ns-p-1.kit-dns.eu: "PowerDNS Authoritative Server 4.9.17 (built Aug 5 2026 13:27:53 by root@localhost)"; ns-p-2.kit-dns.de: "PowerDNS Authoritative Server 4.9.17 (built Aug 5 2026 13:27:53 by root@localhost)"; ns-p-3.kit-dns.net: "PowerDNS Authoritative Server 4.9.17 (built Aug 5 2026 13:27:53 by root@localhost)". 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 195 · primary ns-p-1.kit-dns.eu

Found

Primary (MNAME)
ns-p-1.kit-dns.eu
Contact (RNAME)
hostmaster.kit.edu
Serial
195
Refresh / retry
10800 s / 1800 s
Expire
2592000 s
Negative TTL
600 s

Serial per nameserver

NameserverSerial
ns-p-1.kit-dns.eu (185.237.152.53)195
ns-p-1.kit-dns.eu (2001:678:da0::53)195
ns-p-2.kit-dns.de (185.237.153.53)195
ns-p-2.kit-dns.de (2001:678:da4::53)195
ns-p-3.kit-dns.net (141.52.0.53)195
ns-p-3.kit-dns.net (2a00:139f:e::53)195

Checks

  • ✓ Serial 195 everywhere #22
    All nameservers serve the same version of the zone.
  • ✓ Timers within recommendations #23
    SOA refresh 3h, retry 30m, expire 30d, negative TTL 10m.
  • ✓ Primary is a public nameserver #24
    The primary nameserver ns-p-1.kit-dns.eu is one of the listed nameservers.
  • ✓ Contact hostmaster@kit.edu #25
    The SOA RNAME hostmaster.kit.edu means hostmaster@kit.edu.
  • ✓ Counter serial #26
    The serial 195 is a plain counter.

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
185.237.152.53:53
TypeValueTTL
SOAns-p-1.kit-dns.eu. hostmaster.kit.edu. 195 10800 1800 2592000 600600
NSns-p-2.kit-dns.de.600
NSns-p-1.kit-dns.eu.600
NSns-p-3.kit-dns.net.600
TXT"google-site-verification=efpqWbFUiXUnCJvCBlWSxJfhYbcoa0eYXRf9vtzLErE"900
TXT"v=spf1 redirect=spf.scc.kit.edu"900
TXT"HARICA-0bXd7cgOYWNn4EbBHLz"900
TXT"HARICA-e592JyYdbl887YcB0AO"900

Checks

  • ✓ TTLs within range #32
    TTLs: 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