security-insider.de

Checked 22 October 2026, 00:10 UTC · via 8.8.8.8
!Passed with warnings
27 passed 1 warning 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

dns.vogel-net.de, pns.dtag.de, secondary006.dtag.net

Found

Parent zone
de
Delegation from
a.nic.de (194.0.0.53)
NS at the parent
dns.vogel-net.de, pns.dtag.de, secondary006.dtag.net
NS in the zone
dns.vogel-net.de, pns.dtag.de, secondary006.dtag.net
NameserverAddressesNetwork (AS)Glue
dns.vogel-net.de195.243.159.100AS3320 DTAG - Deutsche Telekom AG, DE-
pns.dtag.de194.25.0.125 2003:40:8000::100AS3320 DTAG - Deutsche Telekom AG, DE AS3320 DTAG - Deutsche Telekom AG, DE194.25.0.125 2003:40:8000::100
secondary006.dtag.net195.244.245.25 2a00:fa8:3:0:100:0:6:1AS5605 NETUSE - NetUSE AG, DE AS5605 NETUSE - NetUSE AG, DE-

Checks

  • ✓ 3 nameservers #6
    Delegated to dns.vogel-net.de, pns.dtag.de, secondary006.dtag.net.
  • ✓ 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 2 IPv6 /48s.
  • ✓ 2 autonomous systems #11
    The nameservers are spread over: AS3320 (DTAG - Deutsche Telekom AG, DE): 3 addresses; AS5605 (NETUSE - NetUSE AG, DE): 2 addresses.
  • ✓ Nameserver names under 2 TLDs #12
    Nameserver names use the TLDs .de, .net.
  • i
    Partly IPv6
    These nameservers have no IPv6 address: dns.vogel-net.de.
    #13

Nameservers

info

5 of 5 addresses answer authoritatively

Found

NameserverAnswerRecursionTCP / EDNSAXFRVersion
dns.vogel-net.de 195.243.159.100NOERROR, 15 ms, authoritativenoyes / yesrefusedNone
pns.dtag.de 194.25.0.125NOERROR, 10 ms, authoritativenoyes / yesrefusedDomainNameServer
pns.dtag.de 2003:40:8000::100NOERROR, 7 ms, authoritativenoyes / yesrefusedDomainNameServer
secondary006.dtag.net 195.244.245.25NOERROR, 12 ms, authoritativenoyes / yesrefusedDomainNameServer
secondary006.dtag.net 2a00:fa8:3:0:100:0:6:1NOERROR, 18 ms, authoritativenoyes / yesrefusedDomainNameServer

Checks

  • ✓ All respond #14
    All 5 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: dns.vogel-net.de: "None"; pns.dtag.de: "DomainNameServer"; secondary006.dtag.net: "DomainNameServer".
    #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 2026053031 · primary dns.vogel-net.de

Found

Primary (MNAME)
dns.vogel-net.de
Contact (RNAME)
hotline.vogel-net.de
Serial
2026053031
Refresh / retry
14400 s / 3600 s
Expire
2419200 s
Negative TTL
43200 s

Serial per nameserver

NameserverSerial
dns.vogel-net.de (195.243.159.100)2026053031
pns.dtag.de (194.25.0.125)2026053031
pns.dtag.de (2003:40:8000::100)2026053031
secondary006.dtag.net (195.244.245.25)2026053031
secondary006.dtag.net (2a00:fa8:3:0:100:0:6:1)2026053031

Checks

  • ✓ Serial 2026053031 everywhere #22
    All nameservers serve the same version of the zone.
  • ✓ Timers within recommendations #23
    SOA refresh 4h, retry 1h, expire 28d, negative TTL 12h.
  • ✓ Primary is a public nameserver #24
    The primary nameserver dns.vogel-net.de is one of the listed nameservers.
  • ✓ Contact hotline@vogel-net.de #25
    The SOA RNAME hotline.vogel-net.de means hotline@vogel-net.de.
  • ✓ Date-based serial #26
    The serial 2026053031 follows the YYYYMMDDnn convention (2026-05-30).

DNSSEC

info

Signed, DS published at parent

Found

Validated by resolver
yes
Denial of existence
NSEC
Signatures valid until
30 October 2026

DS at the parent

Key tagAlgorithmDigestMatches a key
54346ECDSAP256SHA256 (13)SHA256 9745F72C9DF93C71…yes

DNSKEY in the zone

Key tagRoleAlgorithm
54346KSK (257)ECDSAP256SHA256 (13)

Checks

  • ✓ Signed and validated #27
    The zone is signed, the parent publishes a DS record, and the resolver validates the answers.
  • ✓ DS matches a key #28
    The DS record at the parent matches a key in the zone: key tag 54346 (SHA256).
  • ✓ Modern algorithms #29
    Key algorithms: ECDSAP256SHA256 (13).
  • ✓ Signatures valid until 2026-10-30 #30
    The earliest DNSKEY/SOA signature expires at 2026-10-30 12:38 UTC.
  • i
    NSEC
    The zone uses NSEC, so its full contents can be listed by walking the NSEC chain. That is fine unless the names are sensitive.
    #31

Records

warn

11 records at the apex

Found

Read from
195.243.159.100:53
TypeValueTTL
SOAdns.vogel-net.de. hotline.vogel-net.de. 2026053031 14400 3600 2419200 4320043200
NSdns.vogel-net.de.43200
NSpns.dtag.de.43200
NSsecondary006.dtag.net.43200
A212.227.224.23543200
MX0 securityinsider-de02b.t-v1.mx.microsoft.60
TXT"v=spf1 include:spf.protection.outlook.com include:spf1.vogel.de -all"43200
TXT"google-site-verification=8PqDG2PdBCGP_b-fHMheeIa9pt5Vkcauxt7DQCcZgSY"43200
TXT"MS=ms81264118"43200
TXT"d365mktkey=8f6EDmudXz9ylh12PJniged4vcHG6fxgxyhI1Lp4j0sx"43200
CAA0 issue "letsencrypt.org"43200

Checks

  • !
    Very low TTLs
    These records have a TTL below 5m, causing extra queries and slower lookups: MX (1m). Low TTLs are useful just before a planned change. The NS TTL at the parent is 1d and in the zone 12h; resolvers may use either.
    #32
  • ✓ 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: letsencrypt.org.