medienboard.de

Checked 21 October 2026, 23:21 UTC · via 8.8.8.8
!Passed with warnings
21 passed 2 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.cbxnet.de, ns3.cbxnet.de

Found

Parent zone
de
Delegation from
a.nic.de (194.0.0.53)
NS at the parent
ns1.cbxnet.de, ns3.cbxnet.de
NS in the zone
ns1.cbxnet.de, ns3.cbxnet.de
NameserverAddressesNetwork (AS)Glue
ns1.cbxnet.de212.87.33.1AS12512 CBXNET - CBXNET combox internet GmbH, DE212.87.33.1
ns3.cbxnet.de213.191.33.253AS12512 CBXNET - CBXNET combox internet GmbH, DE213.191.33.253

Checks

  • i
    2 nameservers
    Two nameservers meet the minimum; RFC 2182 recommends three or more for important zones: ns1.cbxnet.de, ns3.cbxnet.de.
    #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 (AS12512 (CBXNET - CBXNET combox internet 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 .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

info

2 of 2 addresses answer authoritatively

Found

NameserverAnswerRecursionTCP / EDNSAXFRVersion
ns1.cbxnet.de 212.87.33.1NOERROR, 13 ms, authoritativenoyes / yesrefuseddont ask a lady for her age
ns3.cbxnet.de 213.191.33.253NOERROR, 13 ms, authoritativenoyes / yesrefuseddont ask a lady for her age

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.
  • i
    Identifying string disclosed
    These nameservers answer version queries with a string that is not a version number: ns1.cbxnet.de: "dont ask a lady for her age"; ns3.cbxnet.de: "dont ask a lady for her age".
    #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 2026092202 · primary ns1.cbxnet.de

Found

Primary (MNAME)
ns1.cbxnet.de
Contact (RNAME)
postmaster.cbxnet.de
Serial
2026092202
Refresh / retry
28800 s / 7200 s
Expire
604800 s
Negative TTL
86400 s

Serial per nameserver

NameserverSerial
ns1.cbxnet.de (212.87.33.1)2026092202
ns3.cbxnet.de (213.191.33.253)2026092202

Checks

  • ✓ Serial 2026092202 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 ns1.cbxnet.de is one of the listed nameservers.
  • ✓ Contact postmaster@cbxnet.de #25
    The SOA RNAME postmaster.cbxnet.de means postmaster@cbxnet.de.
  • ✓ Date-based serial #26
    The serial 2026092202 follows the YYYYMMDDnn convention (2026-09-22).

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

pass

20 records at the apex

Found

Read from
212.87.33.1:53
TypeValueTTL
SOAns1.cbxnet.de. postmaster.cbxnet.de. 2026092202 28800 7200 604800 86400600
NSns3.cbxnet.de.600
NSns1.cbxnet.de.600
A193.53.251.68600
MX30 mx03.hornetsecurity.com.3600
MX40 mx04.hornetsecurity.com.3600
MX10 mx01.hornetsecurity.com.3600
MX20 mx02.hornetsecurity.com.3600
TXT"v=spf1 ip4:193.53.251.68 ip4:89.246.71.66 mx mx:crsend.com include:spf.protection.outlook.com include:spf-de.emailsignatures365.com include:spf.mailjet.com include:spf.sendinblue.com include:spf.medienboard-de.cloud.nospamproxy.com include:agenturserver.d" "e include:spf.hornetsecurity.com ~all"60
TXT"vzy9hzkzym0wbv717v74qyfds87b4t8j"60
TXT"CKtHqfzlY+w5vURHApPuwEyhawqH93lZ3uW6IJ93+3I="60
TXT"Sendinblue-code:093b432661da93a38a7750db67c9f970"60
TXT"_globalsign-domain-verification=e-biYlTN8H71gHEMF21oaXZv39q26VtUZWl3nYQUn0"60
TXT"apple-domain-verification=7YnFGc6q8VZM3Gor"60
TXT"google-site-verification=S3OXxAqVB2RB5jCNTEeLRoZeciZNpVEjN1cgpF9j7a8"60
TXT"sophos-domain-verification=0a6be2ce8615cad1cc7da534faf3f79fa131822233801607f62362b109025fca"60
CAA0 issue "thawte.com"300
CAA0 issue "comodoca.com"300
CAA0 issue "globalsign.com"300
CAA0 issue "letsencrypt.org"300

Checks

  • ✓ TTLs within range #32
    TTLs: A 10m, MX 1h, 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.
  • ✓ CAA restricts issuance #35
    Certificates may be issued by: thawte.com, comodoca.com, globalsign.com, letsencrypt.org.