salue.de

Checked 22 October 2026, 00:01 UTC · via 8.8.8.8
!Passed with warnings
20 passed 3 warnings 0 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

info

ns1.intersaar.de, ns2.intersaar.de, ns3.intersaar.de

Found

Parent zone
de
Delegation from
a.nic.de (194.0.0.53)
NS at the parent
ns1.intersaar.de, ns2.intersaar.de, ns3.intersaar.de
NS in the zone
ns1.intersaar.de, ns2.intersaar.de, ns3.intersaar.de
NameserverAddressesNetwork (AS)Glue
ns1.intersaar.de213.135.0.130 2a02:430::1:61:2AS12941 INTERSAAR-AS - intersaar GmbH, DE AS12941 INTERSAAR-AS - intersaar GmbH, DE213.135.0.130 2a02:430::1:61:2
ns2.intersaar.de213.135.3.26 2a02:430::1:62:2AS12941 INTERSAAR-AS - intersaar GmbH, DE AS12941 INTERSAAR-AS - intersaar GmbH, DE213.135.3.26 2a02:430::1:62:2
ns3.intersaar.de213.135.4.154 2a02:430::1:63:2AS12941 INTERSAAR-AS - intersaar GmbH, DE AS12941 INTERSAAR-AS - intersaar GmbH, DE213.135.4.154 2a02:430::1:63:2

Checks

  • ✓ 3 nameservers #6
    Delegated to ns1.intersaar.de, ns2.intersaar.de, ns3.intersaar.de.
  • ✓ 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 2a02:430::/48, while the other address family is spread over several networks.
    #10
  • i
    All nameservers in one AS
    All nameserver addresses are announced by one network operator (AS12941 (INTERSAAR-AS - intersaar GmbH, DE): 6 addresses). An outage or attack on that network affects all nameservers; large anycast providers mitigate this, but a secondary DNS provider adds independence.
    #11
  • i
    All nameserver names under .de
    All nameserver names are under one TLD, so a problem with that TLD also makes the nameservers unreachable. Some operators use names under two TLDs for extra resilience.
    #12
  • ✓ All reachable over IPv6 #13
    Every nameserver has an IPv6 address.

Nameservers

warn

6 of 6 addresses answer authoritatively

Found

NameserverAnswerRecursionTCP / EDNSAXFRVersion
ns1.intersaar.de 213.135.0.130NOERROR, 7 ms, authoritativenoyes / yesrefused9.18.33-1~deb12u2-Debian
ns1.intersaar.de 2a02:430::1:61:2NOERROR, 7 ms, authoritativenoyes / yesrefused9.18.33-1~deb12u2-Debian
ns2.intersaar.de 213.135.3.26NOERROR, 7 ms, authoritativenoyes / yesrefused9.18.33-1~deb12u2-Debian
ns2.intersaar.de 2a02:430::1:62:2NOERROR, 7 ms, authoritativenoyes / yesrefused9.18.33-1~deb12u2-Debian
ns3.intersaar.de 213.135.4.154NOERROR, 6 ms, authoritativenoyes / yesrefused9.18.33-1~deb12u2-Debian
ns3.intersaar.de 2a02:430::1:63:2NOERROR, 5 ms, authoritativenoyes / yesrefused9.18.33-1~deb12u2-Debian

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: ns1.intersaar.de: "9.18.33-1~deb12u2-Debian"; ns2.intersaar.de: "9.18.33-1~deb12u2-Debian"; ns3.intersaar.de: "9.18.33-1~deb12u2-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 2026070210 · primary ns1.intersaar.de

Found

Primary (MNAME)
ns1.intersaar.de
Contact (RNAME)
hostmaster.intersaar.de
Serial
2026070210
Refresh / retry
86400 s / 3600 s
Expire
3600000 s
Negative TTL
86400 s

Serial per nameserver

NameserverSerial
ns1.intersaar.de (213.135.0.130)2026070210
ns1.intersaar.de (2a02:430::1:61:2)2026070210
ns2.intersaar.de (213.135.3.26)2026070210
ns2.intersaar.de (2a02:430::1:62:2)2026070210
ns3.intersaar.de (213.135.4.154)2026070210
ns3.intersaar.de (2a02:430::1:63:2)2026070210

Checks

  • ✓ Serial 2026070210 everywhere #22
    All nameservers serve the same version of the zone.
  • ✓ Timers within recommendations #23
    SOA refresh 1d, retry 1h, expire 1000h, negative TTL 1d.
  • ✓ Primary is a public nameserver #24
    The primary nameserver ns1.intersaar.de is one of the listed nameservers.
  • ✓ Contact hostmaster@intersaar.de #25
    The SOA RNAME hostmaster.intersaar.de means hostmaster@intersaar.de.
  • ✓ Date-based serial #26
    The serial 2026070210 follows the YYYYMMDDnn convention (2026-07-02).

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

warn

14 records at the apex

Found

Read from
213.135.0.130:53
TypeValueTTL
SOAns1.intersaar.de. hostmaster.intersaar.de. 2026070210 86400 3600 3600000 8640060
NSns2.intersaar.de.60
NSns1.intersaar.de.60
NSns3.intersaar.de.60
A213.135.8.23460
AAAA2a02:430:0:44e6::260
MX30 mx03.hornetsecurity.com.60
MX20 mx02.hornetsecurity.com.60
MX10 mx01.hornetsecurity.com.60
MX40 mx04.hornetsecurity.com.60
TXT"v=spf1 include:_spf.intersaar.de include:antispameurope.com -all"60
TXT"MS=ms11799845"60
TXT"_98jc3mrmie0l23bwhy99hxh85zqbjfx"60
TXT"google-site-verification=1qsk-B-QA12U8-fozjaeZCAP6cHGBkq4IRXYsDZ69MQ"60

Checks

  • !
    Very low TTLs
    These records have a TTL below 5m, causing extra queries and slower lookups: A (1m), AAAA (1m), MX (1m), NS (1m). Low TTLs are useful just before a planned change. The NS TTL at the parent is 1d and in the zone 1m; resolvers may use either.
    #32
  • ✓ 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