munzinger.de

Checked 21 October 2026, 23:31 UTC · via 8.8.8.8
✗Problems found
18 passed 4 warnings 3 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

fail

ns2.key-systems.net, ns2.sedat.de, ns3.sedat.de, sedat1.sedat.de

Found

Parent zone
de
Delegation from
a.nic.de (194.0.0.53)
NS at the parent
ns2.key-systems.net, ns2.sedat.de, ns3.sedat.de, sedat1.sedat.de
NS in the zone
ns1.sedat.de, ns2.rrpproxy.net, ns2.sedat.de, ns3.sedat.de
NameserverAddressesNetwork (AS)Glue
ns1.sedat.de (zone only)193.141.67.53AS205376 DINOEX - Dirk Meyer, DE-
ns2.key-systems.net (parent only)194.50.187.229 2a04:2b00:14dd::229AS1921 RCODEZERO-ANYCAST-SEC1-TLD - ipcom GmbH, AT AS1921 RCODEZERO-ANYCAST-SEC1-TLD - ipcom GmbH, AT-
ns2.rrpproxy.net (zone only)194.50.187.226 2a04:2b00:14dd::226AS1921 RCODEZERO-ANYCAST-SEC1-TLD - ipcom GmbH, AT AS1921 RCODEZERO-ANYCAST-SEC1-TLD - ipcom GmbH, AT-
ns2.sedat.de149.154.159.52AS9009 M247 - M247 Europe SRL, RO149.154.159.52
ns3.sedat.de74.207.245.196 2600:3c01::f03c:91ff:fe5c:dd34AS63949 AKAMAI-LINODE-AP - Akamai Connected Cloud, SG AS63949 AKAMAI-LINODE-AP - Akamai Connected Cloud, SG74.207.245.196 2600:3c01::f03c:91ff:fe5c:dd34
sedat1.sedat.de (parent only)(does not resolve)-

Checks

  • ✓ 4 nameservers #6
    Delegated to ns2.key-systems.net, ns2.sedat.de, ns3.sedat.de, sedat1.sedat.de.
  • !
    NS sets differ
    The nameservers at the parent and in the zone should be the same. Only at the parent: ns2.key-systems.net, sedat1.sedat.de; only in the zone: ns1.sedat.de, ns2.rrpproxy.net. ns2.sedat.de, ns3.sedat.de report NS ns1.sedat.de ns2.rrpproxy.net ns2.sedat.de ns3.sedat.de.
    #7
  • ✓ No glue needed #8
    All nameservers are outside the zone, so no glue records are needed.
  • ✗
    Nameserver names don't resolve
    These nameservers have no A or AAAA record, so they can't be reached (lame delegation): sedat1.sedat.de.
    #9
  • ✓ Nameservers in different networks #10
    The nameservers are spread over 4 IPv4 /24s and 2 IPv6 /48s.
  • ✓ 4 autonomous systems #11
    The nameservers are spread over: AS1921 (RCODEZERO-ANYCAST-SEC1-TLD - ipcom GmbH, AT): 4 addresses; AS205376 (DINOEX - Dirk Meyer, DE): 1 address; AS63949 (AKAMAI-LINODE-AP - Akamai Connected Cloud, SG): 2 addresses; AS9009 (M247 - M247 Europe SRL, RO): 1 address.
  • ✓ Nameserver names under 2 TLDs #12
    Nameserver names use the TLDs .de, .net.
  • i
    Partly IPv6
    These nameservers have no IPv6 address: ns1.sedat.de, ns2.sedat.de.
    #13

Nameservers

fail

3 of 8 addresses answer authoritatively

Found

NameserverAnswerRecursionTCP / EDNSAXFRVersion
ns1.sedat.de 193.141.67.53REFUSED, 8 ms, NOT authoritativenono / yesrefused9.20.29
ns2.key-systems.net 194.50.187.229REFUSED, 11 ms, NOT authoritativenono / yesrefusedreg-wie1
ns2.key-systems.net 2a04:2b00:14dd::229REFUSED, 12 ms, NOT authoritativenono / yesrefusedreg-wie1
ns2.rrpproxy.net 194.50.187.226REFUSED, 11 ms, NOT authoritativenono / yesrefusedreg-wie1
ns2.rrpproxy.net 2a04:2b00:14dd::226REFUSED, 12 ms, NOT authoritativenono / yesrefusedreg-wie1
ns2.sedat.de 149.154.159.52NOERROR, 4 ms, authoritativenoyes / yesrefused9.8.4-rpz2+rl005.12-P1
ns3.sedat.de 74.207.245.196NOERROR, 165 ms, authoritativenoyes / yesrefused9.9.5-9+deb8u15-Debian
ns3.sedat.de 2600:3c01::f03c:91ff:fe5c:dd34NOERROR, 158 ms, authoritativenoyes / yesrefused9.9.5-9+deb8u15-Debian

Checks

  • ✓ All respond #14
    All 8 nameserver addresses answered.
  • ✗
    Lame delegation
    These nameservers don't answer authoritatively for the zone, so resolvers ignore them: ns1.sedat.de (193.141.67.53): REFUSED, authoritative=false; ns2.key-systems.net (194.50.187.229): REFUSED, authoritative=false; ns2.key-systems.net (2a04:2b00:14dd::229): REFUSED, authoritative=false; ns2.rrpproxy.net (194.50.187.226): REFUSED, authoritative=false; ns2.rrpproxy.net (2a04:2b00:14dd::226): REFUSED, authoritative=false.
    #15
  • ✓ 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: ns1.sedat.de: "9.20.29"; ns2.sedat.de: "9.8.4-rpz2+rl005.12-P1"; ns3.sedat.de: "9.9.5-9+deb8u15-Debian". 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: ns1.sedat.de (193.141.67.53): ; ns2.key-systems.net (194.50.187.229): ; ns2.key-systems.net (2a04:2b00:14dd::229): ; ns2.rrpproxy.net (194.50.187.226): ; ns2.rrpproxy.net (2a04:2b00:14dd::226): .
    #19
  • ✓ EDNS supported #20
    All nameservers support EDNS(0).
  • ✓ Public addresses #21
    All nameserver addresses are publicly routable.

SOA

warn

serial 2026081221 · primary sedat1.sedat.de

Found

Primary (MNAME)
sedat1.sedat.de
Contact (RNAME)
hostmaster.munzinger.de
Serial
2026081221
Refresh / retry
600 s / 600 s
Expire
3600 s
Negative TTL
3600 s

Serial per nameserver

NameserverSerial
ns2.sedat.de (149.154.159.52)2026081221
ns3.sedat.de (74.207.245.196)2026081221
ns3.sedat.de (2600:3c01::f03c:91ff:fe5c:dd34)2026081221

Checks

  • ✓ Serial 2026081221 everywhere #22
    All nameservers serve the same version of the zone.
  • !
    Unusual SOA timers
    refresh 10m is outside 20m–1d; retry 10m should be shorter than refresh 10m; expire 1h is shorter than 7d; secondaries stop answering too soon when the primary is down. Current values: refresh 10m, retry 10m, expire 1h, negative TTL 1h.
    #23
  • ✓ Primary is a public nameserver #24
    The primary nameserver sedat1.sedat.de is one of the listed nameservers.
  • ✓ Contact hostmaster@munzinger.de #25
    The SOA RNAME hostmaster.munzinger.de means hostmaster@munzinger.de.
  • ✓ Date-based serial #26
    The serial 2026081221 follows the YYYYMMDDnn convention (2026-08-12).

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

13 records at the apex

Found

Read from
149.154.159.52:53
TypeValueTTL
SOAsedat1.sedat.de. hostmaster.munzinger.de. 2026081221 600 600 3600 360086400
NSns2.rrpproxy.net.86400
NSns2.sedat.de.86400
NSns3.sedat.de.86400
NSns1.sedat.de.86400
A37.24.145.11486400
A93.241.1.13586400
MX10 mx0.munzinger.de.86400
MX20 mx1.munzinger.de.86400
TXT"v=spf1 a mx ip4:93.241.1.128/26 ip4:37.24.145.112/28 ip6:2003:de:8018::/48 include:newsmailservice.de include:protection.outlook.com ~all"86400
TXT"MS=7AB7765E008DD57326C16C303F89FD49D1179FC3"86400
TXT"google-site-verification=MhSk7E-des3NiVXESL8q7O3e5jtSv3ETSBJ3Mg_miw4"86400
TXT"atlassian-domain-verification=cQ5KJ94KG5xcby0mv8Z1hX9FKaEWB9R8laRV8j7eULoxtF81eW9F/oVRM9ca/gDr"86400

Checks

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