vsa-verlag.de

Checked 22 October 2026, 01:00 UTC · via 8.8.8.8
✗Problems found
21 passed 2 warnings 1 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.syncope.de, ns2.syncope.de

Found

Parent zone
de
Delegation from
a.nic.de (194.0.0.53)
NS at the parent
ns1.syncope.de, ns2.syncope.de
NS in the zone
ns1.syncope.de, ns2.syncope.de
NameserverAddressesNetwork (AS)Glue
ns1.syncope.de78.47.219.213 2a01:4f8:221:19f:35fd:d6f:34d5:7df4AS24940 HETZNER-AS - Hetzner Online GmbH, DE AS24940 HETZNER-AS - Hetzner Online GmbH, DE78.47.219.213 2a01:4f8:221:19f:35fd:d6f:34d5:7df4
ns2.syncope.de152.89.107.167 2a03:4000:39:f7:346a:dfff:fe7f:d671AS197540 netcup-AS - netcup GmbH, DE AS197540 netcup-AS - netcup GmbH, DE152.89.107.167 2a03:4000:39:f7:346a:dfff:fe7f:d671

Checks

  • i
    2 nameservers
    Two nameservers meet the minimum; RFC 2182 recommends three or more for important zones: ns1.syncope.de, ns2.syncope.de.
    #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.
  • ✓ Nameservers in different networks #10
    The nameservers are spread over 2 IPv4 /24s and 2 IPv6 /48s.
  • ✓ 2 autonomous systems #11
    The nameservers are spread over: AS197540 (netcup-AS - netcup GmbH, DE): 2 addresses; AS24940 (HETZNER-AS - Hetzner Online GmbH, DE): 2 addresses.
  • 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

4 of 4 addresses answer authoritatively

Found

NameserverAnswerRecursionTCP / EDNSAXFRVersion
ns1.syncope.de 78.47.219.213NOERROR, 3 ms, authoritativenoyes / yesrefusedPowerDNS Authoritative Server 5.0.7 (built Aug 6 2026 00:00:00 by mockbuild@localhost)
ns1.syncope.de 2a01:4f8:221:19f:35fd:d6f:34d5:7df4NOERROR, 3 ms, authoritativenoyes / yesrefusedPowerDNS Authoritative Server 5.0.7 (built Aug 6 2026 00:00:00 by mockbuild@localhost)
ns2.syncope.de 152.89.107.167NOERROR, 1 ms, authoritativenoyes / yesrefusedPowerDNS Authoritative Server 5.0.7 (built Aug 6 2026 00:00:00 by mockbuild@localhost)
ns2.syncope.de 2a03:4000:39:f7:346a:dfff:fe7f:d671NOERROR, 2 ms, authoritativenoyes / yesrefusedPowerDNS Authoritative Server 5.0.7 (built Aug 6 2026 00:00:00 by mockbuild@localhost)

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: ns1.syncope.de: "PowerDNS Authoritative Server 5.0.7 (built Aug 6 2026 00:00:00 by mockbuild@localhost)"; ns2.syncope.de: "PowerDNS Authoritative Server 5.0.7 (built Aug 6 2026 00:00:00 by mockbuild@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

fail

serial 2026072801 · primary ns1.syncope.de

Found

Primary (MNAME)
ns1.syncope.de
Contact (RNAME)
hostmaster\@syncope.de
Serial
2026072801
Refresh / retry
86400 s / 7200 s
Expire
1209600 s
Negative TTL
300 s

Serial per nameserver

NameserverSerial
ns1.syncope.de (78.47.219.213)2026072801
ns1.syncope.de (2a01:4f8:221:19f:35fd:d6f:34d5:7df4)2026072801
ns2.syncope.de (152.89.107.167)2026072801
ns2.syncope.de (2a03:4000:39:f7:346a:dfff:fe7f:d671)2026072801

Checks

  • ✓ Serial 2026072801 everywhere #22
    All nameservers serve the same version of the zone.
  • ✓ Timers within recommendations #23
    SOA refresh 1d, retry 2h, expire 14d, negative TTL 5m.
  • ✓ Primary is a public nameserver #24
    The primary nameserver ns1.syncope.de is one of the listed nameservers.
  • ✗
    Invalid contact address
    The SOA RNAME "hostmaster\\@syncope.de" contains an @; it must be written with a dot instead (hostmaster.example.com).
    #25
  • ✓ Date-based serial #26
    The serial 2026072801 follows the YYYYMMDDnn convention (2026-07-28).

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

6 records at the apex

Found

Read from
78.47.219.213:53
TypeValueTTL
SOAns1.syncope.de. hostmaster\@syncope.de. 2026072801 86400 7200 1209600 30086400
NSns2.syncope.de.86400
NSns1.syncope.de.86400
A193.96.188.140300
MX10 matangi.syncope.it.300
TXT"v=spf1 mx:spf.syncope.de include:_spf.minuskel.de ~all"300

Checks

  • ✓ TTLs within range #32
    TTLs: A 5m, MX 5m, 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