cispa.de

Checked 21 October 2026, 22:07 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

ns1.cispa.de, ns2.domaindiscount24.net

Found

Parent zone
de
Delegation from
a.nic.de (194.0.0.53)
NS at the parent
ns1.cispa.de, ns2.domaindiscount24.net
NS in the zone
ns1.cispa.de, ns2.domaindiscount24.net
NameserverAddressesNetwork (AS)Glue
ns1.cispa.de134.96.225.189AS680 DFN - Verein zur Foerderung eines Deutschen Forschungsnetzes e.V., DE134.96.225.189
ns2.domaindiscount24.net194.50.187.34 2a04:2b00:14dd::34AS1921 RCODEZERO-ANYCAST-SEC1-TLD - ipcom GmbH, AT AS1921 RCODEZERO-ANYCAST-SEC1-TLD - ipcom GmbH, AT-

Checks

  • i
    2 nameservers
    Two nameservers meet the minimum; RFC 2182 recommends three or more for important zones: ns1.cispa.de, ns2.domaindiscount24.net.
    #6
  • ✓ Parent and zone agree #7
    The parent delegation and the zone's NS records list the same nameservers.
  • ✓ Glue present and correct #8
    Glue is published for the nameservers inside the zone: ns1.cispa.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 2 IPv4 /24s and 1 IPv6 /48.
  • ✓ 2 autonomous systems #11
    The nameservers are spread over: AS1921 (RCODEZERO-ANYCAST-SEC1-TLD - ipcom GmbH, AT): 2 addresses; AS680 (DFN - Verein zur Foerderung eines Deutschen Forschungsnetzes e.V., DE): 1 address.
  • ✓ Nameserver names under 2 TLDs #12
    Nameserver names use the TLDs .de, .net.
  • i
    Partly IPv6
    These nameservers have no IPv6 address: ns1.cispa.de.
    #13

Nameservers

warn

3 of 3 addresses answer authoritatively

Found

NameserverAnswerRecursionTCP / EDNSAXFRVersion
ns1.cispa.de 134.96.225.189NOERROR, 9 ms, authoritativenoyes / yesrefused9.20.29-1~deb13u1-Debian
ns2.domaindiscount24.net 194.50.187.34NOERROR, 11 ms, authoritativenoyes / yesrefusedreg-wie1
ns2.domaindiscount24.net 2a04:2b00:14dd::34NOERROR, 12 ms, authoritativenoyes / yesrefusedreg-wie1

Checks

  • ✓ All respond #14
    All 3 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: ns1.cispa.de: "9.20.29-1~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 1792571853 · primary ns1.cispa.de

Found

Primary (MNAME)
ns1.cispa.de
Contact (RNAME)
hostmaster.cispa.de
Serial
1792571853
Refresh / retry
86400 s / 7200 s
Expire
3600000 s
Negative TTL
3600 s

Serial per nameserver

NameserverSerial
ns1.cispa.de (134.96.225.189)1792571853
ns2.domaindiscount24.net (194.50.187.34)1792571853
ns2.domaindiscount24.net (2a04:2b00:14dd::34)1792571853

Checks

  • ✓ Serial 1792571853 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.
  • ✓ Primary is a public nameserver #24
    The primary nameserver ns1.cispa.de is one of the listed nameservers.
  • ✓ Contact hostmaster@cispa.de #25
    The SOA RNAME hostmaster.cispa.de means hostmaster@cispa.de.
  • ✓ Timestamp serial #26
    The serial 1792571853 is a Unix timestamp (2026-10-21 08:37 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

18 records at the apex

Found

Read from
134.96.225.189:53
TypeValueTTL
SOAns1.cispa.de. hostmaster.cispa.de. 1792571853 86400 7200 3600000 36007200
NSns1.cispa.de.86400
NSns2.domaindiscount24.net.86400
A212.21.165.1143600
MX40 c1232.mx.srv.dfn.de.86400
MX40 b1232.mx.srv.dfn.de.86400
MX40 a1232.mx.srv.dfn.de.86400
TXT"druide-validation-domaine=7e7200884e8bb56dcc04da0cf40158eb"3600
TXT"MS=ms99480265"3600
TXT"google-site-verification=gTThQYFktA54_eRvGkCefol35CEDMmfQINronylhcrI"3600
TXT"HARICA-aiOSR3Sfnd730HpnCCe"3600
TXT"adobe-idp-site-verification=3f268c0cb09d8b444df9b5c17b756f591c8058bb08bee37fe3a5067addffdaec"3600
TXT"v=spf1 mx a:mail.cispa.saarland ip4:134.96.7.0/24 ip4:134.76.9.0/24 ip4:134.76.10.0/23 ip4:134.76.26.0/24 include:amadeus._spf.cispa.de include:mpi._spf.cispa.de include:gwdg.de -all"3600
TXT"anny-verification=17da5e37-f862-4a4c-8cee-3fde10149c00"3600
TXT"mistral-domain-verification=e8fe83600b4af294c6798be6876498800026bf33"3600
TXT"anthropic-domain-verification-v3drdk=DbrnQlzp6TntShCMogroSkdig"3600
TXT"apple-domain-verification=TNL2k7rFGqKlHNKt"3600
TXT"google-site-verification=IHbVADlGKQ15woZCEpuRYx892D3cZrdNVgoXJEx6ns4"3600

Checks

  • ✓ TTLs within range #32
    TTLs: A 1h, MX 1d, 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