nwzonline.de

Checked 21 October 2026, 23:40 UTC · via 8.8.8.8
✗Problems found
21 passed 3 warnings 1 failed 4 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

ans1.ewetel.net, ans2.ewetel.de, ans3.ewetel.net, ns.medien-systempartner.de

Found

Parent zone
de
Delegation from
a.nic.de (194.0.0.53)
NS at the parent
ans1.ewetel.net, ans2.ewetel.de, ans3.ewetel.net, ns.medien-systempartner.de
NS in the zone
ans1.ewetel.net, ans2.ewetel.de, ans3.ewetel.net, ns.medien-systempartner.de
NameserverAddressesNetwork (AS)Glue
ans1.ewetel.net213.170.187.14AS9145 EWETEL - EWE TEL GmbH, DE-
ans2.ewetel.de212.6.121.254AS9145 EWETEL - EWE TEL GmbH, DE212.6.121.254
ans3.ewetel.net85.16.255.14AS9145 EWETEL - EWE TEL GmbH, DE-
ns.medien-systempartner.de80.228.114.1AS9145 EWETEL - EWE TEL GmbH, DE80.228.114.1

Checks

  • ✓ 4 nameservers #6
    Delegated to ans1.ewetel.net, ans2.ewetel.de, ans3.ewetel.net, ns.medien-systempartner.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 4 IPv4 /24s and 0 IPv6 /48s.
  • i
    All nameservers in one AS
    All nameserver addresses are announced by one network operator (AS9145 (EWETEL - EWE TEL GmbH, 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 .de, .net.
  • !
    No IPv6
    None of the nameservers has an IPv6 address, so IPv6-only resolvers can't reach them.
    #13

Nameservers

fail

4 of 4 addresses answer authoritatively

Found

NameserverAnswerRecursionTCP / EDNSAXFRVersion
ans1.ewetel.net 213.170.187.14NOERROR, 11 ms, authoritativenoyes / yesrefused-
ans2.ewetel.de 212.6.121.254NOERROR, 11 ms, authoritativenoyes / yesrefused-
ans3.ewetel.net 85.16.255.14NOERROR, 11 ms, authoritativenoyes / yesrefused-
ns.medien-systempartner.de 80.228.114.1NOERROR, 11 ms, authoritativenono / yesrefused9.11.4-P2-RedHat-9.11.4-26.P2.el7_9.4

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.
  • !
    Software version disclosed
    These nameservers report their software version via version.bind/version.server, which helps attackers find known vulnerabilities: ns.medien-systempartner.de: "9.11.4-P2-RedHat-9.11.4-26.P2.el7_9.4". Hide or replace the version string.
    #17
  • ✓ Zone transfers refused #18
    No nameserver allows a zone transfer to the public.
  • ✗
    No DNS over TCP
    DNS over TCP is required (RFC 7766); without it, large answers such as DNSSEC responses fail. Not answering over TCP: ns.medien-systempartner.de (80.228.114.1): dial tcp 80.228.114.1:53: i/o timeout.
    #19
  • ✓ EDNS supported #20
    All nameservers support EDNS(0).
  • ✓ Public addresses #21
    All nameserver addresses are publicly routable.

SOA

pass

serial 2026101900 · primary ns.medien-systempartner.de

Found

Primary (MNAME)
ns.medien-systempartner.de
Contact (RNAME)
hostmaster.medien-systempartner.de
Serial
2026101900
Refresh / retry
10800 s / 3600 s
Expire
604800 s
Negative TTL
86400 s

Serial per nameserver

NameserverSerial
ans1.ewetel.net (213.170.187.14)2026101900
ans2.ewetel.de (212.6.121.254)2026101900
ans3.ewetel.net (85.16.255.14)2026101900
ns.medien-systempartner.de (80.228.114.1)2026101900

Checks

  • ✓ Serial 2026101900 everywhere #22
    All nameservers serve the same version of the zone.
  • ✓ Timers within recommendations #23
    SOA refresh 3h, retry 1h, expire 7d, negative TTL 1d.
  • ✓ Primary is a public nameserver #24
    The primary nameserver ns.medien-systempartner.de is one of the listed nameservers.
  • ✓ Contact hostmaster@medien-systempartner.de #25
    The SOA RNAME hostmaster.medien-systempartner.de means hostmaster@medien-systempartner.de.
  • ✓ Date-based serial #26
    The serial 2026101900 follows the YYYYMMDDnn convention (2026-10-19).

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

12 records at the apex

Found

Read from
213.170.187.14:53
TypeValueTTL
SOAns.medien-systempartner.de. hostmaster.medien-systempartner.de. 2026101900 10800 3600 604800 8640086400
NSans1.ewetel.net.86400
NSans3.ewetel.net.86400
NSns.medien-systempartner.de.86400
NSans2.ewetel.de.86400
A80.228.115.12300
MX10 mx4.medien-systempartner.de.86400
MX10 mx3.medien-systempartner.de.86400
TXT"MS=ms82366219"3600
TXT"v=spf1 ip4:80.228.115.225 ip4:80.228.115.226 ip4:87.253.232.0/21 ip4:185.189.236.0/22 ip4:185.211.120.0/22 ip4:185.250.236.0/22 include:spf.protection.outlook.com -all"3600
TXT"google-site-verification=Gmv2SA9dMucgNoCQuEKw9tQk_2gyet_Z-usiekjqw9M"3600
TXT"facebook-domain-verification=7hxg8mvql28yi56243i1sbimkqvyla"3600

Checks

  • ✓ TTLs within range #32
    TTLs: A 5m, MX 1d, 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