oeko.de

Checked 21 October 2026, 23:41 UTC · via 8.8.8.8
!Passed with warnings
21 passed 4 warnings 0 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

ns2.oeko.de, pns.dtag.de, secondary006.dtag.net

Found

Parent zone
de
Delegation from
a.nic.de (194.0.0.53)
NS at the parent
ns2.oeko.de, pns.dtag.de, secondary006.dtag.net
NS in the zone
dns-b2.oeko.de, dns-da1.oeko.de, ns2.oeko.de, pns.dtag.de, secondary006.dtag.net
NameserverAddressesNetwork (AS)Glue
dns-b2.oeko.de (zone only)212.184.2.18AS3320 DTAG - Deutsche Telekom AG, DE-
dns-da1.oeko.de (zone only)212.184.28.18AS3320 DTAG - Deutsche Telekom AG, DE-
ns2.oeko.de212.184.28.17AS3320 DTAG - Deutsche Telekom AG, DE212.184.28.17
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 ns2.oeko.de, pns.dtag.de, secondary006.dtag.net.
  • !
    NS sets differ
    The nameservers at the parent and in the zone should be the same. Only in the zone: dns-b2.oeko.de, dns-da1.oeko.de. dns-b2.oeko.de, dns-da1.oeko.de, ns2.oeko.de, pns.dtag.de, secondary006.dtag.net report NS dns-b2.oeko.de dns-da1.oeko.de ns2.oeko.de pns.dtag.de secondary006.dtag.net.
    #7
  • ✓ Glue present and correct #8
    Glue is published for the nameservers inside the zone: ns2.oeko.de.
  • ✓ 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 2 IPv6 /48s.
  • ✓ 2 autonomous systems #11
    The nameservers are spread over: AS3320 (DTAG - Deutsche Telekom AG, DE): 5 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-b2.oeko.de, dns-da1.oeko.de, ns2.oeko.de.
    #13

Nameservers

warn

7 of 7 addresses answer authoritatively

Found

NameserverAnswerRecursionTCP / EDNSAXFRVersion
dns-b2.oeko.de 212.184.2.18NOERROR, 14 ms, authoritativenoyes / yesrefused9.18.49-1~deb12u2-Debian
dns-da1.oeko.de 212.184.28.18NOERROR, 6 ms, authoritativenoyes / yesrefused9.18.49-1~deb12u2-Debian
ns2.oeko.de 212.184.28.17NOERROR, 6 ms, authoritativenoyes / yesrefused9.18.49-1~deb12u2-Debian
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, 17 ms, authoritativenoyes / yesrefusedDomainNameServer

Checks

  • ✓ All respond #14
    All 7 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: dns-b2.oeko.de: "9.18.49-1~deb12u2-Debian"; dns-da1.oeko.de: "9.18.49-1~deb12u2-Debian"; ns2.oeko.de: "9.18.49-1~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

warn

serial 2026100201 · primary ns2.oeko.de

Found

Primary (MNAME)
ns2.oeko.de
Contact (RNAME)
hostmaster.oeko.de
Serial
2026100201
Refresh / retry
3600 s / 3600 s
Expire
2419200 s
Negative TTL
7200 s

Serial per nameserver

NameserverSerial
dns-b2.oeko.de (212.184.2.18)2026100201
dns-da1.oeko.de (212.184.28.18)2026100201
ns2.oeko.de (212.184.28.17)2026100201
pns.dtag.de (194.25.0.125)2026100201
pns.dtag.de (2003:40:8000::100)2026100201
secondary006.dtag.net (195.244.245.25)2026100201
secondary006.dtag.net (2a00:fa8:3:0:100:0:6:1)2026100201

Checks

  • ✓ Serial 2026100201 everywhere #22
    All nameservers serve the same version of the zone.
  • !
    Unusual SOA timers
    retry 1h should be shorter than refresh 1h. Current values: refresh 1h, retry 1h, expire 28d, negative TTL 2h.
    #23
  • ✓ Primary is a public nameserver #24
    The primary nameserver ns2.oeko.de is one of the listed nameservers.
  • ✓ Contact hostmaster@oeko.de #25
    The SOA RNAME hostmaster.oeko.de means hostmaster@oeko.de.
  • ✓ Date-based serial #26
    The serial 2026100201 follows the YYYYMMDDnn convention (2026-10-02).

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

14 records at the apex

Found

Read from
212.184.2.18:53
TypeValueTTL
SOAns2.oeko.de. hostmaster.oeko.de. 2026100201 3600 3600 2419200 72003600
NSpns.dtag.de.3600
NSns2.oeko.de.3600
NSsecondary006.dtag.net.3600
NSdns-da1.oeko.de.3600
NSdns-b2.oeko.de.3600
A92.205.166.653600
MX10 mxgateda.oeko.de.3600
MX20 mxgateb.oeko.de.3600
MX20 mxgatefr.oeko.de.3600
TXT"apple-domain-verification=Q9yjr8PWjNEFn5VV"3600
TXT"MS=ms82250798"3600
TXT"v=spf1 mx ip4:212.184.28.8/29 ip4:212.184.2.8/29 ip4:194.25.186.248/30 ip4:37.61.205.159/32 ip4:89.191.89.22/32 ip4:92.205.166.65/32 include:spf.protection.outlook.com include:secureserver.net include:_spf.zimpel.de -all"3600
TXT"cisco-ci-domain-verification=1157d5e589ed00d1b1648850dce274ae0737209e9e34e6b50ce9e90954bc2c7b"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