btg-bestellservice.de

Checked 21 October 2026, 21:54 UTC · via 8.8.8.8
✗Problems found
21 passed 2 warnings 1 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.ibro.de, pns.dtag.de, secondary006.dtag.net

Found

Parent zone
de
Delegation from
a.nic.de (194.0.0.53)
NS at the parent
ns.ibro.de, pns.dtag.de, secondary006.dtag.net
NS in the zone
ns.ibro.de, pns.dtag.de, secondary006.dtag.net
NameserverAddressesNetwork (AS)Glue
ns.ibro.de62.159.24.50AS3320 DTAG - Deutsche Telekom AG, DE62.159.24.50
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 ns.ibro.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: ns.ibro.de.
    #13

Nameservers

fail

5 of 5 addresses answer authoritatively

Found

NameserverAnswerRecursionTCP / EDNSAXFRVersion
ns.ibro.de 62.159.24.50NOERROR, 14 ms, authoritativenoyes / yesALLOWED (11 records)9.11.3-1ubuntu1.18-Ubuntu
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 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.
  • !
    Software version disclosed
    These nameservers report their software version via version.bind/version.server, which helps attackers find known vulnerabilities: ns.ibro.de: "9.11.3-1ubuntu1.18-Ubuntu". Hide or replace the version string.
    #17
  • ✗
    Zone transfer allowed
    These nameservers send the complete zone to anyone who asks (AXFR), exposing all host names: ns.ibro.de (62.159.24.50): 11 records. Restrict zone transfers to your secondary servers.
    #18
  • ✓ 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

info

serial 2025050704 · primary ns.btg-bestellservice.de

Found

Primary (MNAME)
ns.btg-bestellservice.de
Contact (RNAME)
root.ns.btg-bestellservice.de
Serial
2025050704
Refresh / retry
86400 s / 28800 s
Expire
2419200 s
Negative TTL
86400 s

Serial per nameserver

NameserverSerial
ns.ibro.de (62.159.24.50)2025050704
pns.dtag.de (194.25.0.125)2025050704
pns.dtag.de (2003:40:8000::100)2025050704
secondary006.dtag.net (195.244.245.25)2025050704
secondary006.dtag.net (2a00:fa8:3:0:100:0:6:1)2025050704

Checks

  • ✓ Serial 2025050704 everywhere #22
    All nameservers serve the same version of the zone.
  • ✓ Timers within recommendations #23
    SOA refresh 1d, retry 8h, expire 28d, negative TTL 1d.
  • i
    Hidden master
    The primary nameserver ns.btg-bestellservice.de is not listed as a nameserver: a hidden master that only feeds the public secondaries. That is a common setup; make sure it is not reachable for zone transfers from outside.
    #24
  • ✓ Contact root@ns.btg-bestellservice.de #25
    The SOA RNAME root.ns.btg-bestellservice.de means root@ns.btg-bestellservice.de.
  • ✓ Date-based serial #26
    The serial 2025050704 follows the YYYYMMDDnn convention (2025-05-07).

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

7 records at the apex

Found

Read from
62.159.24.50:53
TypeValueTTL
SOAns.btg-bestellservice.de. root.ns.btg-bestellservice.de. 2025050704 86400 28800 2419200 8640086400
NSsecondary006.dtag.net.86400
NSns.ibro.de.86400
NSpns.dtag.de.86400
A62.159.24.6086400
MX100 ns.btg-bestellservice.de.86400
TXT"v=spf1 a mx ip4:62.159.24.48/28 -all"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