freeshell.de

Checked 21 October 2026, 22:31 UTC · via 8.8.8.8
!Passed with warnings
25 passed 3 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

warn

ns1.nic-nac-project.de, ns2.nic-nac-project.de, ns3.nic-nac-project.de

Found

Parent zone
de
Delegation from
a.nic.de (194.0.0.53)
NS at the parent
ns1.nic-nac-project.de, ns2.nic-nac-project.de, ns3.nic-nac-project.de
NS in the zone
ns1.nic-nac-project.de, ns2.nic-nac-project.de, ns3.nic-nac-project.de
NameserverAddressesNetwork (AS)Glue
ns1.nic-nac-project.de116.202.128.144AS24940 HETZNER-AS - Hetzner Online GmbH, DE-
ns2.nic-nac-project.de150.230.154.241AS31898 ORACLE-BMC-31898 - Oracle Corporation, US-
ns3.nic-nac-project.de92.5.21.184AS31898 ORACLE-BMC-31898 - Oracle Corporation, US-

Checks

  • ✓ 3 nameservers #6
    Delegated to ns1.nic-nac-project.de, ns2.nic-nac-project.de, ns3.nic-nac-project.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.
  • ✓ Nameservers in different networks #10
    The nameservers are spread over 3 IPv4 /24s and 0 IPv6 /48s.
  • ✓ 2 autonomous systems #11
    The nameservers are spread over: AS24940 (HETZNER-AS - Hetzner Online GmbH, DE): 1 address; AS31898 (ORACLE-BMC-31898 - Oracle Corporation, US): 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
  • !
    No IPv6
    None of the nameservers has an IPv6 address, so IPv6-only resolvers can't reach them.
    #13

Nameservers

warn

3 of 3 addresses answer authoritatively

Found

NameserverAnswerRecursionTCP / EDNSAXFRVersion
ns1.nic-nac-project.de 116.202.128.144NOERROR, 5 ms, authoritativenoyes / yesrefused42
ns2.nic-nac-project.de 150.230.154.241NOERROR, 14 ms, authoritativenoyes / yesrefused9.18.39-0ubuntu0.24.04.8-Ubuntu
ns3.nic-nac-project.de 92.5.21.184NOERROR, 4 ms, authoritativenoyes / yesrefused9.18.39-0ubuntu0.24.04.8-Ubuntu

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: ns2.nic-nac-project.de: "9.18.39-0ubuntu0.24.04.8-Ubuntu"; ns3.nic-nac-project.de: "9.18.39-0ubuntu0.24.04.8-Ubuntu". 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

warn

serial 2026102201 · primary ns1.nic-nac-project.de

Found

Primary (MNAME)
ns1.nic-nac-project.de
Contact (RNAME)
postmaster.nic-nac-project.de
Serial
2026102201
Refresh / retry
3600 s / 3600 s
Expire
604800 s
Negative TTL
60 s

Serial per nameserver

NameserverSerial
ns1.nic-nac-project.de (116.202.128.144)2026102201
ns2.nic-nac-project.de (150.230.154.241)2026102201
ns3.nic-nac-project.de (92.5.21.184)2026102201

Checks

  • ✓ Serial 2026102201 everywhere #22
    All nameservers serve the same version of the zone.
  • !
    Unusual SOA timers
    retry 1h should be shorter than refresh 1h; negative caching TTL (minimum) 1m is outside 5m–1d (RFC 2308 recommends 1–3 hours). Current values: refresh 1h, retry 1h, expire 7d, negative TTL 1m.
    #23
  • ✓ Primary is a public nameserver #24
    The primary nameserver ns1.nic-nac-project.de is one of the listed nameservers.
  • ✓ Contact postmaster@nic-nac-project.de #25
    The SOA RNAME postmaster.nic-nac-project.de means postmaster@nic-nac-project.de.
  • ✓ Date-based serial #26
    The serial 2026102201 follows the YYYYMMDDnn convention (2026-10-22).

DNSSEC

info

Signed, DS published at parent

Found

Validated by resolver
yes
Denial of existence
NSEC
Signatures valid until
20 December 2026

DS at the parent

Key tagAlgorithmDigestMatches a key
2355ECDSAP256SHA256 (13)SHA256 A5A532E59C4D96FD…yes

DNSKEY in the zone

Key tagRoleAlgorithm
2355KSK (257)ECDSAP256SHA256 (13)
17779ZSK (256)ECDSAP256SHA256 (13)

Checks

  • ✓ Signed and validated #27
    The zone is signed, the parent publishes a DS record, and the resolver validates the answers.
  • ✓ DS matches a key #28
    The DS record at the parent matches a key in the zone: key tag 2355 (SHA256).
  • ✓ Modern algorithms #29
    Key algorithms: ECDSAP256SHA256 (13).
  • ✓ Signatures valid until 2026-12-20 #30
    The earliest DNSKEY/SOA signature expires at 2026-12-20 22:00 UTC.
  • i
    NSEC
    The zone uses NSEC, so its full contents can be listed by walking the NSEC chain. That is fine unless the names are sensitive.
    #31

Records

info

11 records at the apex

Found

Read from
116.202.128.144:53
TypeValueTTL
SOAns1.nic-nac-project.de. postmaster.nic-nac-project.de. 2026102201 3600 3600 604800 60600
NSns3.nic-nac-project.de.600
NSns2.nic-nac-project.de.600
NSns1.nic-nac-project.de.600
A116.202.128.144600
AAAA2a01:4f8:231:482b::2600
MX0 freeshell.de.600
TXT"v=spf1 mx ip4:178.63.180.184/29 ip6:2a01:4f8:231:482b::2 -all"600
CAA0 issue "letsencrypt.org"600
CAA0 issue "sectigo.com"600
CAA0 iodef "mailto:postmaster@freeshell.de"600

Checks

  • ✓ TTLs within range #32
    TTLs: A 10m, AAAA 10m, MX 10m, NS 10m. The NS TTL at the parent is 1d and in the zone 10m; resolvers may use either.
  • ✓ No CNAME at the apex #33
    The zone apex has no CNAME record.
  • i
    Wildcard record
    A random name under the zone resolves, so there is a wildcard (*) record. Typos and non-existent hosts resolve too, which can confuse mail and certificate checks.
    #34
  • ✓ CAA restricts issuance #35
    Certificates may be issued by: letsencrypt.org, sectigo.com.