arbeitswerk-premium.de

Checked 21 October 2026, 21:30 UTC · via 8.8.8.8
!Passed with warnings
19 passed 4 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

warn

ns1.netmark.pl, ns2.netmark.pl

Found

Parent zone
de
Delegation from
a.nic.de (194.0.0.53)
NS at the parent
ns1.netmark.pl, ns2.netmark.pl
NS in the zone
ns1.netmark.pl, ns2.netmark.pl
NameserverAddressesNetwork (AS)Glue
ns1.netmark.pl77.55.252.119AS15967 NETARTGROUP - Nazwa.pl Sp.z.o.o., PL-
ns2.netmark.pl77.55.252.120AS15967 NETARTGROUP - Nazwa.pl Sp.z.o.o., PL-

Checks

  • i
    2 nameservers
    Two nameservers meet the minimum; RFC 2182 recommends three or more for important zones: ns1.netmark.pl, ns2.netmark.pl.
    #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 one network
    all IPv4 addresses are in 77.55.252.0/24. A single network failure takes all nameservers down; RFC 2182 recommends topologically separate networks (anycast setups are an exception).
    #10
  • i
    All nameservers in one AS
    All nameserver addresses are announced by one network operator (AS15967 (NETARTGROUP - Nazwa.pl Sp.z.o.o., PL): 2 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 .pl
    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
  • !
    No IPv6
    None of the nameservers has an IPv6 address, so IPv6-only resolvers can't reach them.
    #13

Nameservers

warn

2 of 2 addresses answer authoritatively

Found

NameserverAnswerRecursionTCP / EDNSAXFRVersion
ns1.netmark.pl 77.55.252.119NOERROR, 22 ms, authoritativenoyes / yesrefusedPowerDNS Authoritative Server 5.1.0-alpha0 (built Jul 31 2025 09:43:32 by root@localhost)
ns2.netmark.pl 77.55.252.120NOERROR, 40 ms, authoritativenoyes / yesrefusedPowerDNS Authoritative Server 5.1.0-alpha0 (built Jul 31 2025 09:43:32 by root@localhost)

Checks

  • ✓ All respond #14
    All 2 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.netmark.pl: "PowerDNS Authoritative Server 5.1.0-alpha0 (built Jul 31 2025 09:43:32 by root@localhost)"; ns2.netmark.pl: "PowerDNS Authoritative Server 5.1.0-alpha0 (built Jul 31 2025 09:43:32 by root@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

pass

serial 2026070700 · primary ns1.netmark.pl

Found

Primary (MNAME)
ns1.netmark.pl
Contact (RNAME)
firma.netmark.pl
Serial
2026070700
Refresh / retry
3600 s / 1800 s
Expire
1209600 s
Negative TTL
86400 s

Serial per nameserver

NameserverSerial
ns1.netmark.pl (77.55.252.119)2026070700
ns2.netmark.pl (77.55.252.120)2026070700

Checks

  • ✓ Serial 2026070700 everywhere #22
    All nameservers serve the same version of the zone.
  • ✓ Timers within recommendations #23
    SOA refresh 1h, retry 30m, expire 14d, negative TTL 1d.
  • ✓ Primary is a public nameserver #24
    The primary nameserver ns1.netmark.pl is one of the listed nameservers.
  • ✓ Contact firma@netmark.pl #25
    The SOA RNAME firma.netmark.pl means firma@netmark.pl.
  • ✓ Date-based serial #26
    The serial 2026070700 follows the YYYYMMDDnn convention (2026-07-07).

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
77.55.252.119:53
TypeValueTTL
SOAns1.netmark.pl. firma.netmark.pl. 2026070700 3600 1800 1209600 86400300
NSns1.netmark.pl.300
NSns2.netmark.pl.300
A77.55.252.97300
MX0 arbeitswerk-premium.de.300
TXT"v=spf1 ip4:77.55.252.97 +a +mx +ip4:195.167.159.139 +include:_spf.netmark.pl ~all"300

Checks

  • ✓ TTLs within range #32
    TTLs: A 5m, MX 5m, NS 5m. The NS TTL at the parent is 1d and in the zone 5m; 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