rehadat.de

Checked 22 October 2026, 00:00 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

ns.vision-net.de, ns.vision-net.it

Found

Parent zone
de
Delegation from
a.nic.de (194.0.0.53)
NS at the parent
ns.vision-net.de, ns.vision-net.it
NS in the zone
ns.vision-net.de, ns.vision-net.it
NameserverAddressesNetwork (AS)Glue
ns.vision-net.de79.142.32.34 2a01:7b40:0:33::1034AS47347 VC-AS - Vision Consulting Deutschland GmbH, DE AS47347 VC-AS - Vision Consulting Deutschland GmbH, DE79.142.32.34 2a01:7b40:0:33::1034
ns.vision-net.it79.142.33.34 2a01:7b40:0:36::1034AS47347 VC-AS - Vision Consulting Deutschland GmbH, DE AS47347 VC-AS - Vision Consulting Deutschland GmbH, DE-

Checks

  • i
    2 nameservers
    Two nameservers meet the minimum; RFC 2182 recommends three or more for important zones: ns.vision-net.de, ns.vision-net.it.
    #6
  • ✓ 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 2a01:7b40::/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 (AS47347 (VC-AS - Vision Consulting Deutschland GmbH, DE): 4 addresses). An outage or attack on that network affects all nameservers; large anycast providers mitigate this, but a secondary DNS provider adds independence.
    #11
  • ✓ Nameserver names under 2 TLDs #12
    Nameserver names use the TLDs .de, .it.
  • ✓ All reachable over IPv6 #13
    Every nameserver has an IPv6 address.

Nameservers

warn

4 of 4 addresses answer authoritatively

Found

NameserverAnswerRecursionTCP / EDNSAXFRVersion
ns.vision-net.de 79.142.32.34NOERROR, 7 ms, authoritativenoyes / yesrefusedPowerDNS Authoritative Server 4.7.4 (built Apr 17 2023 07:24:03 by root@98d79c655901)
ns.vision-net.de 2a01:7b40:0:33::1034NOERROR, 9 ms, authoritativenoyes / yesrefusedPowerDNS Authoritative Server 4.7.4 (built Apr 17 2023 07:24:03 by root@98d79c655901)
ns.vision-net.it 79.142.33.34NOERROR, 7 ms, authoritativenoyes / yesrefusedPowerDNS Authoritative Server 4.8.1 (built Jul 7 2023 07:05:25 by root@6ae12c02278e)
ns.vision-net.it 2a01:7b40:0:36::1034NOERROR, 8 ms, authoritativenoyes / yesrefusedPowerDNS Authoritative Server 4.8.1 (built Jul 7 2023 07:05:25 by root@6ae12c02278e)

Checks

  • ✓ All respond #14
    All 4 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.vision-net.de: "PowerDNS Authoritative Server 4.7.4 (built Apr 17 2023 07:24:03 by root@98d79c655901)"; ns.vision-net.it: "PowerDNS Authoritative Server 4.8.1 (built Jul 7 2023 07:05:25 by root@6ae12c02278e)". 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 2025112601 · primary ns.vision-net.de

Found

Primary (MNAME)
ns.vision-net.de
Contact (RNAME)
vc.vision-net.de
Serial
2025112601
Refresh / retry
43200 s / 14400 s
Expire
1209600 s
Negative TTL
43200 s

Serial per nameserver

NameserverSerial
ns.vision-net.de (79.142.32.34)2025112601
ns.vision-net.de (2a01:7b40:0:33::1034)2025112601
ns.vision-net.it (79.142.33.34)2025112601
ns.vision-net.it (2a01:7b40:0:36::1034)2025112601

Checks

  • ✓ Serial 2025112601 everywhere #22
    All nameservers serve the same version of the zone.
  • ✓ Timers within recommendations #23
    SOA refresh 12h, retry 4h, expire 14d, negative TTL 12h.
  • ✓ Primary is a public nameserver #24
    The primary nameserver ns.vision-net.de is one of the listed nameservers.
  • ✓ Contact vc@vision-net.de #25
    The SOA RNAME vc.vision-net.de means vc@vision-net.de.
  • ✓ Date-based serial #26
    The serial 2025112601 follows the YYYYMMDDnn convention (2025-11-26).

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

pass

7 records at the apex

Found

Read from
79.142.32.34:53
TypeValueTTL
SOAns.vision-net.de. vc.vision-net.de. 2025112601 43200 14400 1209600 4320043200
NSns.vision-net.it.43200
NSns.vision-net.de.43200
A185.5.82.12643200
MX10 mxpool.vision-net.de.43200
TXT"v=spf1 mx ~all"43200
CAA0 issue "letsencrypt.org"43200

Checks

  • ✓ TTLs within range #32
    TTLs: A 12h, MX 12h, NS 12h. The NS TTL at the parent is 1d and in the zone 12h; 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.
  • ✓ CAA restricts issuance #35
    Certificates may be issued by: letsencrypt.org.