belwue.de

Checked 21 October 2026, 21:37 UTC · via 8.8.8.8
!Passed with warnings
23 passed 3 warnings 0 failed 3 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

pass

dns-srv1.uni-stuttgart.de, dns1.belwue.de, dns3.belwue.de, dns5.belwue.de, ns10.univie.ac.at, ns5.univie.ac.at, pns.dtag.de

Found

Parent zone
de
Delegation from
a.nic.de (194.0.0.53)
NS at the parent
dns-srv1.uni-stuttgart.de, dns1.belwue.de, dns3.belwue.de, dns5.belwue.de, ns10.univie.ac.at, ns5.univie.ac.at, pns.dtag.de
NS in the zone
dns-srv1.uni-stuttgart.de, dns1.belwue.de, dns3.belwue.de, dns5.belwue.de, ns10.univie.ac.at, ns5.univie.ac.at, pns.dtag.de
NameserverAddressesNetwork (AS)Glue
dns-srv1.uni-stuttgart.de129.69.252.130 2001:7c0:2053:5301::2AS553 BELWUE - Universitaet Stuttgart, DE AS553 BELWUE - Universitaet Stuttgart, DE-
dns1.belwue.de129.143.2.10 2001:7c0::53:10AS553 BELWUE - Universitaet Stuttgart, DE AS553 BELWUE - Universitaet Stuttgart, DE129.143.2.10 2001:7c0::53:10
dns3.belwue.de129.143.253.133 2001:7c0:0:253::133AS553 BELWUE - Universitaet Stuttgart, DE AS553 BELWUE - Universitaet Stuttgart, DE129.143.253.133 2001:7c0:0:253::133
dns5.belwue.de129.143.4.5 2001:7c0::53:5AS553 BELWUE - Universitaet Stuttgart, DE AS553 BELWUE - Universitaet Stuttgart, DE129.143.4.5 2001:7c0::53:5
ns10.univie.ac.at192.76.243.2 2001:67c:133c::2AS35052 AS_AT_TLD_SERVICES - ACONET, AT AS35052 AS_AT_TLD_SERVICES - ACONET, AT-
ns5.univie.ac.at193.171.255.77 2001:628:453:4305::53AS1120 ACOnet_Services - ACONET, EU AS1120 ACOnet_Services - ACONET, EU-
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

Checks

  • ✓ 7 nameservers #6
    Delegated to dns-srv1.uni-stuttgart.de, dns1.belwue.de, dns3.belwue.de, dns5.belwue.de, ns10.univie.ac.at, ns5.univie.ac.at, pns.dtag.de.
  • ✓ Parent and zone agree #7
    The parent delegation and the zone's NS records list the same nameservers.
  • ✓ Glue present and correct #8
    Glue is published for the nameservers inside the zone: dns1.belwue.de, dns3.belwue.de, dns5.belwue.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 7 IPv4 /24s and 5 IPv6 /48s.
  • ✓ 4 autonomous systems #11
    The nameservers are spread over: AS1120 (ACOnet_Services - ACONET, EU): 2 addresses; AS3320 (DTAG - Deutsche Telekom AG, DE): 2 addresses; AS35052 (AS_AT_TLD_SERVICES - ACONET, AT): 2 addresses; AS553 (BELWUE - Universitaet Stuttgart, DE): 8 addresses.
  • ✓ Nameserver names under 2 TLDs #12
    Nameserver names use the TLDs .at, .de.
  • ✓ All reachable over IPv6 #13
    Every nameserver has an IPv6 address.

Nameservers

warn

14 of 14 addresses answer authoritatively

Found

NameserverAnswerRecursionTCP / EDNSAXFRVersion
dns-srv1.uni-stuttgart.de 129.69.252.130NOERROR, 9 ms, authoritativenoyes / yesrefused-
dns-srv1.uni-stuttgart.de 2001:7c0:2053:5301::2NOERROR, 8 ms, authoritativenoyes / yesrefused-
dns1.belwue.de 129.143.2.10NOERROR, 39 ms, authoritativenoyes / yesrefusedPowerDNS Authoritative Server 4.5.5 (built Dec 8 2022 18:24:18 by root@a309361b6303)
dns1.belwue.de 2001:7c0::53:10NOERROR, 7 ms, authoritativenoyes / yesrefusedPowerDNS Authoritative Server 4.5.5 (built Dec 8 2022 18:24:18 by root@a309361b6303)
dns3.belwue.de 129.143.253.133NOERROR, 7 ms, authoritativenoyes / yesrefusedPowerDNS Authoritative Server 4.5.5 (built Dec 8 2022 18:24:18 by root@a309361b6303)
dns3.belwue.de 2001:7c0:0:253::133NOERROR, 7 ms, authoritativenoyes / yesrefusedPowerDNS Authoritative Server 4.5.5 (built Dec 8 2022 18:24:18 by root@a309361b6303)
dns5.belwue.de 129.143.4.5NOERROR, 8 ms, authoritativenoyes / yesrefusedPowerDNS Authoritative Server 4.5.5 (built Dec 8 2022 18:24:18 by root@a309361b6303)
dns5.belwue.de 2001:7c0::53:5NOERROR, 8 ms, authoritativenoyes / yesrefusedPowerDNS Authoritative Server 4.5.5 (built Dec 8 2022 18:24:18 by root@a309361b6303)
ns10.univie.ac.at 192.76.243.2NOERROR, 7 ms, authoritativenoyes / yesrefused10.11.10
ns10.univie.ac.at 2001:67c:133c::2NOERROR, 7 ms, authoritativenoyes / yesrefused10.11.10
ns5.univie.ac.at 193.171.255.77NOERROR, 9 ms, authoritativenoyes / yesrefused10.03.22P18
ns5.univie.ac.at 2001:628:453:4305::53NOERROR, 9 ms, authoritativenoyes / yesrefused10.03.22P18
pns.dtag.de 194.25.0.125NOERROR, 10 ms, authoritativenoyes / yesrefusedDomainNameServer
pns.dtag.de 2003:40:8000::100NOERROR, 7 ms, authoritativenoyes / yesrefusedDomainNameServer

Checks

  • ✓ All respond #14
    All 14 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: dns1.belwue.de: "PowerDNS Authoritative Server 4.5.5 (built Dec 8 2022 18:24:18 by root@a309361b6303)"; dns3.belwue.de: "PowerDNS Authoritative Server 4.5.5 (built Dec 8 2022 18:24:18 by root@a309361b6303)"; dns5.belwue.de: "PowerDNS Authoritative Server 4.5.5 (built Dec 8 2022 18:24:18 by root@a309361b6303)"; ns10.univie.ac.at: "10.11.10"; ns5.univie.ac.at: "10.03.22P18". 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 2026102010 · primary dns1.belwue.de

Found

Primary (MNAME)
dns1.belwue.de
Contact (RNAME)
hostmaster.belwue.de
Serial
2026102010
Refresh / retry
21000 s / 1800 s
Expire
1209600 s
Negative TTL
86400 s

Serial per nameserver

NameserverSerial
dns-srv1.uni-stuttgart.de (129.69.252.130)2026102010
dns-srv1.uni-stuttgart.de (2001:7c0:2053:5301::2)2026102010
dns1.belwue.de (129.143.2.10)2026102010
dns1.belwue.de (2001:7c0::53:10)2026102010
dns3.belwue.de (129.143.253.133)2026102010
dns3.belwue.de (2001:7c0:0:253::133)2026102010
dns5.belwue.de (129.143.4.5)2026102010
dns5.belwue.de (2001:7c0::53:5)2026102010
ns10.univie.ac.at (192.76.243.2)2026102010
ns10.univie.ac.at (2001:67c:133c::2)2026102010
ns5.univie.ac.at (193.171.255.77)2026102010
ns5.univie.ac.at (2001:628:453:4305::53)2026102010
pns.dtag.de (194.25.0.125)2026102010
pns.dtag.de (2003:40:8000::100)2026102010

Checks

  • ✓ Serial 2026102010 everywhere #22
    All nameservers serve the same version of the zone.
  • ✓ Timers within recommendations #23
    SOA refresh 350m, retry 30m, expire 14d, negative TTL 1d.
  • ✓ Primary is a public nameserver #24
    The primary nameserver dns1.belwue.de is one of the listed nameservers.
  • ✓ Contact hostmaster@belwue.de #25
    The SOA RNAME hostmaster.belwue.de means hostmaster@belwue.de.
  • ✓ Date-based serial #26
    The serial 2026102010 follows the YYYYMMDDnn convention (2026-10-20).

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

warn

20 records at the apex

Found

Read from
129.69.252.130:53
TypeValueTTL
SOAdns1.belwue.de. hostmaster.belwue.de. 2026102010 21000 1800 1209600 864003600
NSdns1.belwue.de.86400
NSdns3.belwue.de.86400
NSns10.univie.ac.at.86400
NSpns.dtag.de.86400
NSdns-srv1.uni-stuttgart.de.86400
NSns5.univie.ac.at.86400
NSdns5.belwue.de.86400
A129.143.253.1113600
A129.143.253.1103600
AAAA2001:7c0:0:253::1103600
AAAA2001:7c0:0:253::1113600
MX10 mx4.belwue.de.100
MX10 mx1.belwue.de.100
MX10 mx2.belwue.de.100
MX10 mx3.belwue.de.100
TXT"HARICA-hEBx6buymeWR1SIMMLU"3600
TXT"google-site-verification=Gu4oInYPgJbQrWp0FMLTiio6jF7pDPxhHtsWGwXJbtg"3600
TXT"google-site-verification=7cPFxpR_kEjsaFvTSE8rWXIsWYI_HQ0IprcSL66da7s"3600
TXT"v=spf1 include:_spf.belwue.de include:spf.gwdg.de ~all"3600

Checks

  • !
    Very low TTLs
    These records have a TTL below 5m, causing extra queries and slower lookups: MX (1m40s). Low TTLs are useful just before a planned change.
    #32
  • ✓ 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