akbw.de

Checked 21 October 2026, 21:28 UTC · via 8.8.8.8
!Passed with warnings
19 passed 5 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

ns.frank-und-freunde.de, ns2.frank-und-freunde.de

Found

Parent zone
de
Delegation from
a.nic.de (194.0.0.53)
NS at the parent
ns.frank-und-freunde.de, ns2.frank-und-freunde.de
NS in the zone
ns.frank-und-freunde.de, ns2.frank-und-freunde.de
NameserverAddressesNetwork (AS)Glue
ns.frank-und-freunde.de157.90.98.73AS24940 HETZNER-AS - Hetzner Online GmbH, DE157.90.98.73
ns2.frank-und-freunde.de87.128.115.107AS3320 DTAG - Deutsche Telekom AG, DE37.24.81.142

Checks

  • i
    2 nameservers
    Two nameservers meet the minimum; RFC 2182 recommends three or more for important zones: ns.frank-und-freunde.de, ns2.frank-und-freunde.de.
    #6
  • ✓ Parent and zone agree #7
    The parent delegation and the zone's NS records list the same nameservers.
  • !
    Glue differs from the zone
    The addresses at the parent (glue) differ from the addresses in the zone: ns2.frank-und-freunde.de (glue 37.24.81.142, zone 87.128.115.107). Update the glue at your registrar.
    #8
  • ✓ 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 0 IPv6 /48s.
  • ✓ 2 autonomous systems #11
    The nameservers are spread over: AS24940 (HETZNER-AS - Hetzner Online GmbH, DE): 1 address; AS3320 (DTAG - Deutsche Telekom AG, DE): 1 address.
  • 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

2 of 2 addresses answer authoritatively

Found

NameserverAnswerRecursionTCP / EDNSAXFRVersion
ns.frank-und-freunde.de 157.90.98.73NOERROR, 2 ms, authoritativenoyes / yesrefused9.20.29-1~deb13u1-Debian
ns2.frank-und-freunde.de 87.128.115.107NOERROR, 28 ms, authoritativenoyes / yesrefused9.9.5-9+deb8u19-Debian

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: ns.frank-und-freunde.de: "9.20.29-1~deb13u1-Debian"; ns2.frank-und-freunde.de: "9.9.5-9+deb8u19-Debian". 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 2026101301 · primary ns.frank-und-freunde.de

Found

Primary (MNAME)
ns.frank-und-freunde.de
Contact (RNAME)
postmaster.fuf.de
Serial
2026101301
Refresh / retry
600 s / 300 s
Expire
86400 s
Negative TTL
86400 s

Serial per nameserver

NameserverSerial
ns.frank-und-freunde.de (157.90.98.73)2026101301
ns2.frank-und-freunde.de (87.128.115.107)2026101301

Checks

  • ✓ Serial 2026101301 everywhere #22
    All nameservers serve the same version of the zone.
  • !
    Unusual SOA timers
    refresh 10m is outside 20m–1d; expire 1d is shorter than 7d; secondaries stop answering too soon when the primary is down. Current values: refresh 10m, retry 5m, expire 1d, negative TTL 1d.
    #23
  • ✓ Primary is a public nameserver #24
    The primary nameserver ns.frank-und-freunde.de is one of the listed nameservers.
  • ✓ Contact postmaster@fuf.de #25
    The SOA RNAME postmaster.fuf.de means postmaster@fuf.de.
  • ✓ Date-based serial #26
    The serial 2026101301 follows the YYYYMMDDnn convention (2026-10-13).

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

10 records at the apex

Found

Read from
157.90.98.73:53
TypeValueTTL
SOAns.frank-und-freunde.de. postmaster.fuf.de. 2026101301 600 300 86400 86400600
NSns.frank-und-freunde.de.600
NSns2.frank-und-freunde.de.600
A157.90.98.78600
MX20 mx-m1.bisping.de.600
MX10 mf-lbn1.bisping.de.600
MX30 mx-l2.bisping.de.600
TXT"v=spf1 a:mail.akbw.de include:spf.protection.outlook.com include:_spf_mx-bb.bisping.de ip4:157.90.98.78 include:spf.crsend.com -all"600
TXT"0v+15FuTS5pmyDCUeVkg0xiHkJJrgFVO1f2GnQzJxapSjp41LTa1D7BHwM1+HF5mUTAzwyx6Q/TiRfBHdWO57Q=="600
TXT"facebook-domain-verification=ac46ykcpt9sg3wai7cd4avcxoskxm7"600

Checks

  • ✓ TTLs within range #32
    TTLs: A 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.
  • ✓ 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