kas.de

Checked 21 October 2026, 23:02 UTC · via 8.8.8.8
✗Problems found
20 passed 5 warnings 1 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

warn

b.ns14.net, ns.kas.de

Found

Parent zone
de
Delegation from
a.nic.de (194.0.0.53)
NS at the parent
b.ns14.net, ns.kas.de
NS in the zone
b.ns14.net, c.ns14.net, ns.kas.de
NameserverAddressesNetwork (AS)Glue
b.ns14.net217.160.81.160 2001:8d8:fe:53:217:160:81:160AS8560 IONOS-AS - IONOS SE, DE AS8560 IONOS-AS - IONOS SE, DE-
c.ns14.net (zone only)185.132.35.160 2607:f1c0:fe:53:185:132:35:160AS15418 IONOS-ANYCAST - Fasthosts Internet Limited, GB AS15418 IONOS-ANYCAST - Fasthosts Internet Limited, GB-
ns.kas.de109.107.145.76AS15404 UNSPECIFIED - COLT Technology Services Group Limited, GB109.107.145.76

Checks

  • i
    2 nameservers
    Two nameservers meet the minimum; RFC 2182 recommends three or more for important zones: b.ns14.net, ns.kas.de.
    #6
  • !
    NS sets differ
    The nameservers at the parent and in the zone should be the same. Only in the zone: c.ns14.net. b.ns14.net, c.ns14.net, ns.kas.de report NS b.ns14.net c.ns14.net ns.kas.de.
    #7
  • ✓ Glue present and correct #8
    Glue is published for the nameservers inside the zone: ns.kas.de.
  • ✓ 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 2 IPv6 /48s.
  • ✓ 3 autonomous systems #11
    The nameservers are spread over: AS15404 (UNSPECIFIED - COLT Technology Services Group Limited, GB): 1 address; AS15418 (IONOS-ANYCAST - Fasthosts Internet Limited, GB): 2 addresses; AS8560 (IONOS-AS - IONOS SE, DE): 2 addresses.
  • ✓ Nameserver names under 2 TLDs #12
    Nameserver names use the TLDs .de, .net.
  • i
    Partly IPv6
    These nameservers have no IPv6 address: ns.kas.de.
    #13

Nameservers

warn

5 of 5 addresses answer authoritatively

Found

NameserverAnswerRecursionTCP / EDNSAXFRVersion
b.ns14.net 217.160.81.160NOERROR, 9 ms, authoritativenoyes / yesrefusedServed by PowerDNS - https://www.powerdns.com/
b.ns14.net 2001:8d8:fe:53:217:160:81:160NOERROR, 9 ms, authoritativenoyes / yesrefusedServed by PowerDNS - https://www.powerdns.com/
c.ns14.net 185.132.35.160NOERROR, 4 ms, authoritativenoyes / yesrefusedServed by PowerDNS - https://www.powerdns.com/
c.ns14.net 2607:f1c0:fe:53:185:132:35:160NOERROR, 4 ms, authoritativenoyes / yesrefusedServed by PowerDNS - https://www.powerdns.com/
ns.kas.de 109.107.145.76NOERROR, 8 ms, authoritativenoyes / yesrefused9.20.24

Checks

  • ✓ All respond #14
    All 5 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.kas.de: "9.20.24". 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 2026082503 · primary dns.kas.de

Found

Primary (MNAME)
dns.kas.de
Contact (RNAME)
hostmaster.kas.de
Serial
2026082503
Refresh / retry
86400 s / 7200 s
Expire
3600000 s
Negative TTL
3600 s

Serial per nameserver

NameserverSerial
b.ns14.net (217.160.81.160)2026082503
b.ns14.net (2001:8d8:fe:53:217:160:81:160)2026082503
c.ns14.net (185.132.35.160)2026082503
c.ns14.net (2607:f1c0:fe:53:185:132:35:160)2026082503
ns.kas.de (109.107.145.76)2026082503

Checks

  • ✓ Serial 2026082503 everywhere #22
    All nameservers serve the same version of the zone.
  • ✓ Timers within recommendations #23
    SOA refresh 1d, retry 2h, expire 1000h, negative TTL 1h.
  • i
    Hidden master (not resolvable)
    The primary nameserver dns.kas.de is not listed as a nameserver and does not resolve publicly: a hidden master, or a placeholder name. Some tools (e.g. dynamic updates) use MNAME to find the primary.
    #24
  • ✓ Contact hostmaster@kas.de #25
    The SOA RNAME hostmaster.kas.de means hostmaster@kas.de.
  • ✓ Date-based serial #26
    The serial 2026082503 follows the YYYYMMDDnn convention (2026-08-25).

DNSSEC

fail

Signed, but no DS at parent

Found

Validated by resolver
no
Denial of existence
NSEC3
NSEC3
0 iterations, 8-byte salt
Signatures valid until
24 September 2026

DNSKEY in the zone

Key tagRoleAlgorithm
21335ZSK (256)RSASHA1-NSEC3-SHA1 (7)
58779KSK (257)RSASHA1-NSEC3-SHA1 (7)

Checks

  • !
    Signed but not delegated securely
    The zone is signed but the parent has no DS record, so the signatures are not used. Publish the DS record at your registrar.
    #27
  • !
    Deprecated algorithm
    SHA-1 based algorithms are deprecated and rejected by some validators: RSASHA1-NSEC3-SHA1 (7). Roll over to ECDSAP256SHA256 (13).
    #29
  • ✗
    Signatures expired
    The DNSSEC signatures expired at 2026-09-24 08:53 UTC; validating resolvers reject the zone.
    #30
  • !
    NSEC3 with extra iterations or salt
    NSEC3 uses 0 iterations and a 8-byte salt. RFC 9276 recommends 0 iterations and no salt: extra iterations cost resolvers CPU and add no real protection, and some validators treat high counts as insecure.
    #31

Records

info

17 records at the apex

Found

Read from
217.160.81.160:53
TypeValueTTL
SOAdns.kas.de. hostmaster.kas.de. 2026082503 86400 7200 3600000 36001200
NSc.ns14.net.1200
NSns.kas.de.1200
NSb.ns14.net.1200
A195.30.23.1291200
MX10 kas-de.mail.protection.outlook.com.1200
TXT"MS=C79A1FE04BFC08B7C324F57265C211B13D549675"3600
TXT"adobe-idp-site-verification=e2c82bab679a626d16c28cac498aa281c726adaeb826cb92c52c67494504e079"3600
TXT"d365mktkey=Ld6CxRNxaj2fbhC8C0F8x0K0yXk8sPEFfgA5wa4k0zsx"3600
TXT"apple-domain-verification=89zFXhEqAUF73bO7"3600
TXT"seobility=6bea10af06914faf8ede16ee714a8908"3600
TXT"d365mktkey=niwV4Xix0rki7P8p4WTeHkcbh0ddrxQR0aBMdnDdFwgx"3600
TXT"v=spf1 include:_spf.xurrent.com include:spf.crsend.com include:marketing.dynamics.com include:spf.protection.outlook.com include:spf.fluct.com ip4:178.77.121.129/26 ip4:46.4.238.128/29 ip4:109.107.145.41 ip4:109.107.145.36 ~all"3600
TXT"teamviewer-sso-verification=e1a0a44a7540414f98723f02ed13e2e7"3600
TXT"cisco-ci-domain-verification=1dd8d77f45f7a8b77e79eb7b95d3a00bf1a8057e470f197c48467a998586eb82"3600
TXT"google-site-verification=Dteomp3YlWLHQXGfXRGWlOTa8HOqORnEiVOavg0GVDo"3600
TXT"ZOOM_verify_hqFQS9YEYqXyq0Tyf325B9"3600

Checks

  • ✓ TTLs within range #32
    TTLs: A 20m, MX 20m, NS 20m. The NS TTL at the parent is 1d and in the zone 20m; 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