fiff.de

Checked 21 October 2026, 22:30 UTC · via 8.8.8.8
!Passed with warnings
22 passed 1 warning 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

ns.nepustil.com, ns1.nepustil.net

Found

Parent zone
de
Delegation from
a.nic.de (194.0.0.53)
NS at the parent
ns.nepustil.com, ns1.nepustil.net
NS in the zone
ns.nepustil.com, ns1.nepustil.net
NameserverAddressesNetwork (AS)Glue
ns.nepustil.com212.71.200.209 2001:14f8:8::1AS12502 NEPUSTILNET-AS01 - Dr.-Ing. Nepustil & Co. GmbH Internet Service Center Ingenieurgesellschaft fuer Systemsoftware und Kommunikationstechnik, DE AS12502 NEPUSTILNET-AS01 - Dr.-Ing. Nepustil & Co. GmbH Internet Service Center Ingenieurgesellschaft fuer Systemsoftware und Kommunikationstechnik, DE-
ns1.nepustil.net212.71.212.81 2001:14f8:7::1AS12502 NEPUSTILNET-AS01 - Dr.-Ing. Nepustil & Co. GmbH Internet Service Center Ingenieurgesellschaft fuer Systemsoftware und Kommunikationstechnik, DE AS12502 NEPUSTILNET-AS01 - Dr.-Ing. Nepustil & Co. GmbH Internet Service Center Ingenieurgesellschaft fuer Systemsoftware und Kommunikationstechnik, DE-

Checks

  • i
    2 nameservers
    Two nameservers meet the minimum; RFC 2182 recommends three or more for important zones: ns.nepustil.com, ns1.nepustil.net.
    #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.
  • i
    All nameservers in one AS
    All nameserver addresses are announced by one network operator (AS12502 (NEPUSTILNET-AS01 - Dr.-Ing. Nepustil & Co. GmbH Internet Service Center Ingenieurgesellschaft fuer Systemsoftware und Kommunikationstechnik, 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 .com, .net.
  • ✓ All reachable over IPv6 #13
    Every nameserver has an IPv6 address.

Nameservers

info

4 of 4 addresses answer authoritatively

Found

NameserverAnswerRecursionTCP / EDNSAXFRVersion
ns.nepustil.com 212.71.200.209NOERROR, 7 ms, authoritativenoyes / yesrefusednull
ns.nepustil.com 2001:14f8:8::1NOERROR, 7 ms, authoritativenoyes / yesrefusednull
ns1.nepustil.net 212.71.212.81NOERROR, 7 ms, authoritativenoyes / yesrefusednull
ns1.nepustil.net 2001:14f8:7::1NOERROR, 7 ms, authoritativenoyes / yesrefusednull

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.
  • i
    Identifying string disclosed
    These nameservers answer version queries with a string that is not a version number: ns.nepustil.com: "null"; ns1.nepustil.net: "null".
    #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 2026100809 · primary ns1.nepustil.net

Found

Primary (MNAME)
ns1.nepustil.net
Contact (RNAME)
hostmaster.nepustil.net
Serial
2026100809
Refresh / retry
86400 s / 7200 s
Expire
2419200 s
Negative TTL
3600 s

Serial per nameserver

NameserverSerial
ns.nepustil.com (212.71.200.209)2026100809
ns.nepustil.com (2001:14f8:8::1)2026100809
ns1.nepustil.net (212.71.212.81)2026100809
ns1.nepustil.net (2001:14f8:7::1)2026100809

Checks

  • ✓ Serial 2026100809 everywhere #22
    All nameservers serve the same version of the zone.
  • ✓ Timers within recommendations #23
    SOA refresh 1d, retry 2h, expire 28d, negative TTL 1h.
  • ✓ Primary is a public nameserver #24
    The primary nameserver ns1.nepustil.net is one of the listed nameservers.
  • ✓ Contact hostmaster@nepustil.net #25
    The SOA RNAME hostmaster.nepustil.net means hostmaster@nepustil.net.
  • ✓ Date-based serial #26
    The serial 2026100809 follows the YYYYMMDDnn convention (2026-10-08).

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

8 records at the apex

Found

Read from
212.71.200.209:53
TypeValueTTL
SOAns1.nepustil.net. hostmaster.nepustil.net. 2026100809 86400 7200 2419200 360086400
NSns1.nepustil.net.86400
NSns.nepustil.com.86400
A185.231.124.171300
AAAA2a0c:5f00:1:1ab::300
MX20 mx.dotplex.com.14400
TXT"v=spf1 a mx a:christensen.uberspace.de mx:lists.fiff.de mx:scripts.fiff.de mx:webhooks.fiff.de include:spf.dotplex.com ~all"3600
TXT"google-site-verification=pcaeRvkj0-3kxKF6WRaVhPNlHuuRtRUy5snc4y2D550"3600

Checks

  • ✓ TTLs within range #32
    TTLs: A 5m, AAAA 5m, MX 4h, 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