frauenkirche-dresden.de

Checked 21 October 2026, 22:31 UTC · via 8.8.8.8
!Passed with warnings
22 passed 2 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

info

ns.dsinet.de, ns.dsinet.eu, ns2.dsinet.de

Found

Parent zone
de
Delegation from
a.nic.de (194.0.0.53)
NS at the parent
ns.dsinet.de, ns.dsinet.eu, ns2.dsinet.de
NS in the zone
ns.dsinet.de, ns.dsinet.eu, ns2.dsinet.de
NameserverAddressesNetwork (AS)Glue
ns.dsinet.de217.18.176.246AS16205 DSINET-ASN - DSI GmbH Daten Service Informationssysteme, DE217.18.176.246
ns.dsinet.eu217.18.184.246 2a00:8180:1001:1::2AS16205 DSINET-ASN - DSI GmbH Daten Service Informationssysteme, DE AS16205 DSINET-ASN - DSI GmbH Daten Service Informationssysteme, DE-
ns2.dsinet.de178.249.27.6AS16205 DSINET-ASN - DSI GmbH Daten Service Informationssysteme, DE178.249.27.6

Checks

  • ✓ 3 nameservers #6
    Delegated to ns.dsinet.de, ns.dsinet.eu, ns2.dsinet.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 3 IPv4 /24s and 1 IPv6 /48.
  • i
    All nameservers in one AS
    All nameserver addresses are announced by one network operator (AS16205 (DSINET-ASN - DSI GmbH Daten Service Informationssysteme, 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, .eu.
  • i
    Partly IPv6
    These nameservers have no IPv6 address: ns.dsinet.de, ns2.dsinet.de.
    #13

Nameservers

warn

4 of 4 addresses answer authoritatively

Found

NameserverAnswerRecursionTCP / EDNSAXFRVersion
ns.dsinet.de 217.18.176.246NOERROR, 11 ms, authoritativenoyes / yesrefused9.16.48-Ubuntu
ns.dsinet.eu 217.18.184.246NOERROR, 10 ms, authoritativenoyes / yesrefused9.18.30-0ubuntu0.20.04.2-Ubuntu
ns.dsinet.eu 2a00:8180:1001:1::2NOERROR, 10 ms, authoritativenoyes / yesrefused9.18.30-0ubuntu0.20.04.2-Ubuntu
ns2.dsinet.de 178.249.27.6NOERROR, 11 ms, authoritativenoyes / yesrefused9.18.33-1~deb12u2-Debian

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.dsinet.de: "9.16.48-Ubuntu"; ns.dsinet.eu: "9.18.30-0ubuntu0.20.04.2-Ubuntu"; ns2.dsinet.de: "9.18.33-1~deb12u2-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

pass

serial 2026050712 · primary ns.dsinet.eu

Found

Primary (MNAME)
ns.dsinet.eu
Contact (RNAME)
hostmaster.dsi.net
Serial
2026050712
Refresh / retry
28800 s / 3600 s
Expire
604800 s
Negative TTL
3600 s

Serial per nameserver

NameserverSerial
ns.dsinet.de (217.18.176.246)2026050712
ns.dsinet.eu (217.18.184.246)2026050712
ns.dsinet.eu (2a00:8180:1001:1::2)2026050712
ns2.dsinet.de (178.249.27.6)2026050712

Checks

  • ✓ Serial 2026050712 everywhere #22
    All nameservers serve the same version of the zone.
  • ✓ Timers within recommendations #23
    SOA refresh 8h, retry 1h, expire 7d, negative TTL 1h.
  • ✓ Primary is a public nameserver #24
    The primary nameserver ns.dsinet.eu is one of the listed nameservers.
  • ✓ Contact hostmaster@dsi.net #25
    The SOA RNAME hostmaster.dsi.net means hostmaster@dsi.net.
  • ✓ Date-based serial #26
    The serial 2026050712 follows the YYYYMMDDnn convention (2026-05-07).

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
217.18.176.246:53
TypeValueTTL
SOAns.dsinet.eu. hostmaster.dsi.net. 2026050712 28800 3600 604800 360086400
NSns.dsinet.eu.3600
NSns2.dsinet.de.3600
NSns.dsinet.de.3600
A81.201.148.313600
MX10 mail.frauenkirche-dresden.de.3600
TXT"MS=ms91150581"3600
TXT"v=spf1 a mx include:spf.dsinet.de ~all"3600
TXT"brevo-code:db8428782b772a69ca4fef0e872c2557"3600
TXT"MS=ms23137929"3600
TXT"MS=41034FF8DB3AFA8A21A87124E96098F676854543"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