nuerburgring.de

Checked 21 October 2026, 23:40 UTC · via 8.8.8.8
!Passed with warnings
20 passed 3 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

auth01.de.folz.net, auth02.de.folz.net

Found

Parent zone
de
Delegation from
a.nic.de (194.0.0.53)
NS at the parent
auth01.de.folz.net, auth02.de.folz.net
NS in the zone
auth01.de.folz.net, auth02.de.folz.net
NameserverAddressesNetwork (AS)Glue
auth01.de.folz.net212.43.64.100AS42652 DELUNET - inexio Informationstechnologie und Telekommunikation Gmbh, DE-
auth02.de.folz.net212.43.66.114AS42652 DELUNET - inexio Informationstechnologie und Telekommunikation Gmbh, DE-

Checks

  • i
    2 nameservers
    Two nameservers meet the minimum; RFC 2182 recommends three or more for important zones: auth01.de.folz.net, auth02.de.folz.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 0 IPv6 /48s.
  • i
    All nameservers in one AS
    All nameserver addresses are announced by one network operator (AS42652 (DELUNET - inexio Informationstechnologie und Telekommunikation Gmbh, DE): 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 .net
    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
auth01.de.folz.net 212.43.64.100NOERROR, 6 ms, authoritativenoyes / yesrefused9.16.23-RH
auth02.de.folz.net 212.43.66.114NOERROR, 6 ms, authoritativenoyes / yesrefused9.11.4-P2-RedHat-9.11.4-26.P2.el7_9.20

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: auth01.de.folz.net: "9.16.23-RH"; auth02.de.folz.net: "9.11.4-P2-RedHat-9.11.4-26.P2.el7_9.20". 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 202610131 · primary auth01.de.folz.net

Found

Primary (MNAME)
auth01.de.folz.net
Contact (RNAME)
guardian.folz.de
Serial
202610131
Refresh / retry
28800 s / 7200 s
Expire
604800 s
Negative TTL
86400 s

Serial per nameserver

NameserverSerial
auth01.de.folz.net (212.43.64.100)202610131
auth02.de.folz.net (212.43.66.114)202610131

Checks

  • ✓ Serial 202610131 everywhere #22
    All nameservers serve the same version of the zone.
  • ✓ Timers within recommendations #23
    SOA refresh 8h, retry 2h, expire 7d, negative TTL 1d.
  • ✓ Primary is a public nameserver #24
    The primary nameserver auth01.de.folz.net is one of the listed nameservers.
  • ✓ Contact guardian@folz.de #25
    The SOA RNAME guardian.folz.de means guardian@folz.de.
  • ✓ Counter serial #26
    The serial 202610131 is a plain counter.

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

11 records at the apex

Found

Read from
212.43.64.100:53
TypeValueTTL
SOAauth01.de.folz.net. guardian.folz.de. 202610131 28800 7200 604800 864003600
NSauth02.de.folz.net.3600
NSauth01.de.folz.net.3600
A212.43.73.2243600
MX10 nuerburgring-de.mail.protection.outlook.com.3600
TXT"MS=ms85036546"3600
TXT"20190314144152187j6atqmtcef87v2b9oslz594a8ef50aggke4t4413ty18lfv"3600
TXT"apple-domain-verification=VTmpidAmERwUirmS"3600
TXT"v=spf1 ip4:62.159.48.83 ip4:62.225.9.2 ip4:92.51.191.106 ip4:145.253.192.109 ip4:149.72.227.21 ip4:167.89.111.77 ip4:212.43.73.182 ip4:212.43.73.185 ip4:212.43.64.96/27 ip4:81.200.96.52 ip4:159.183.33.175 include:spf.protection.outlook.com" " include:spf-eu.emailsignatures365.com a:k60144.coveto.de include:spf.dynect.net include:mailgun.org -all"3600
TXT"1v4lje23o0capqda3gfvlija3v"3600
TXT"google-site-verification=JXsRIdqVnWegzBZ1elzNzOQ33NLIU2S06vDd0YldIGc"3600

Checks

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