Domain report: hs-heilbronn.de

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

dns1.belwue.de, dns3.belwue.de, dns5.belwue.de, pmdns.rz.hs-heilbronn.de

Found

Parent zone: de
Delegation from: a.nic.de (194.0.0.53)
NS at the parent: dns1.belwue.de, dns3.belwue.de, dns5.belwue.de, pmdns.rz.hs-heilbronn.de
NS in the zone: dns1.belwue.de, dns3.belwue.de, dns5.belwue.de, pmdns.rz.hs-heilbronn.de

Nameserver	Addresses	Network (AS)	Glue
dns1.belwue.de	129.143.2.10 2001:7c0::53:10	AS553 BELWUE - Universitaet Stuttgart, DE AS553 BELWUE - Universitaet Stuttgart, DE	129.143.2.10 2001:7c0::53:10
dns3.belwue.de	129.143.253.133 2001:7c0:0:253::133	AS553 BELWUE - Universitaet Stuttgart, DE AS553 BELWUE - Universitaet Stuttgart, DE	129.143.253.133 2001:7c0:0:253::133
dns5.belwue.de	129.143.4.5 2001:7c0::53:5	AS553 BELWUE - Universitaet Stuttgart, DE AS553 BELWUE - Universitaet Stuttgart, DE	129.143.4.5 2001:7c0::53:5
pmdns.rz.hs-heilbronn.de	141.7.96.11	AS553 BELWUE - Universitaet Stuttgart, DE	141.7.96.11

Checks

✓ 4 nameservers #6

Delegated to dns1.belwue.de, dns3.belwue.de, dns5.belwue.de, pmdns.rz.hs-heilbronn.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: pmdns.rz.hs-heilbronn.de.
✓ All names resolve #9

Every nameserver name has an address and is not an alias.
i

One address family in one network

all IPv6 addresses are in 2001:7c0::/48, while the other address family is spread over several networks.

#10
i

All nameservers in one AS

All nameserver addresses are announced by one network operator (AS553 (BELWUE - Universitaet Stuttgart, DE): 7 addresses). An outage or attack on that network affects all nameservers; large anycast providers mitigate this, but a secondary DNS provider adds independence.

#11
i

All nameserver names under .de

All nameserver names are under one TLD, so a problem with that TLD also makes the nameservers unreachable. Some operators use names under two TLDs for extra resilience.

#12
i

Partly IPv6

These nameservers have no IPv6 address: pmdns.rz.hs-heilbronn.de.

#13

Nameservers

warn

7 of 7 addresses answer authoritatively

Found

Nameserver	Answer	Recursion	TCP / EDNS	AXFR	Version
dns1.belwue.de 129.143.2.10	NOERROR, 7 ms, authoritative	no	yes / yes	refused	PowerDNS Authoritative Server 4.5.5 (built Dec 8 2022 18:24:18 by root@a309361b6303)
dns1.belwue.de 2001:7c0::53:10	NOERROR, 7 ms, authoritative	no	yes / yes	refused	PowerDNS Authoritative Server 4.5.5 (built Dec 8 2022 18:24:18 by root@a309361b6303)
dns3.belwue.de 129.143.253.133	NOERROR, 7 ms, authoritative	no	yes / yes	refused	PowerDNS Authoritative Server 4.5.5 (built Dec 8 2022 18:24:18 by root@a309361b6303)
dns3.belwue.de 2001:7c0:0:253::133	NOERROR, 7 ms, authoritative	no	yes / yes	refused	PowerDNS Authoritative Server 4.5.5 (built Dec 8 2022 18:24:18 by root@a309361b6303)
dns5.belwue.de 129.143.4.5	NOERROR, 7 ms, authoritative	no	yes / yes	refused	PowerDNS Authoritative Server 4.5.5 (built Dec 8 2022 18:24:18 by root@a309361b6303)
dns5.belwue.de 2001:7c0::53:5	NOERROR, 7 ms, authoritative	no	yes / yes	refused	PowerDNS Authoritative Server 4.5.5 (built Dec 8 2022 18:24:18 by root@a309361b6303)
pmdns.rz.hs-heilbronn.de 141.7.96.11	NOERROR, 8 ms, authoritative	no	yes / yes	refused	9.20.21

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: 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)"; pmdns.rz.hs-heilbronn.de: "9.20.21". 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 2026102001 · primary pmdns.rz.hs-heilbronn.de

Found

Primary (MNAME): pmdns.rz.hs-heilbronn.de
Contact (RNAME): hostmaster.hs-heilbronn.de
Serial: 2026102001
Refresh / retry: 10800 s / 1800 s
Expire: 3600000 s
Negative TTL: 86400 s

Serial per nameserver

Nameserver	Serial
dns1.belwue.de (129.143.2.10)	2026102001
dns1.belwue.de (2001:7c0::53:10)	2026102001
dns3.belwue.de (129.143.253.133)	2026102001
dns3.belwue.de (2001:7c0:0:253::133)	2026102001
dns5.belwue.de (129.143.4.5)	2026102001
dns5.belwue.de (2001:7c0::53:5)	2026102001
pmdns.rz.hs-heilbronn.de (141.7.96.11)	2026102001

Checks

✓ Serial 2026102001 everywhere #22

All nameservers serve the same version of the zone.
✓ Timers within recommendations #23

SOA refresh 3h, retry 30m, expire 1000h, negative TTL 1d.
✓ Primary is a public nameserver #24

The primary nameserver pmdns.rz.hs-heilbronn.de is one of the listed nameservers.
✓ Contact hostmaster@hs-heilbronn.de #25

The SOA RNAME hostmaster.hs-heilbronn.de means hostmaster@hs-heilbronn.de.
✓ Date-based serial #26

The serial 2026102001 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

pass

25 records at the apex

Found

Read from: 129.143.2.10:53

Type	Value	TTL
SOA	pmdns.rz.hs-heilbronn.de. hostmaster.hs-heilbronn.de. 2026102001 10800 1800 3600000 86400	3600
NS	dns5.belwue.de.	3600
NS	dns3.belwue.de.	3600
NS	pmdns.rz.hs-heilbronn.de.	3600
NS	dns1.belwue.de.	3600
A	141.7.96.82	600
MX	10 hsheilbronn-de0e.mail.protection.outlook.com.	3600
TXT	"adobe-idp-site-verification=350aac411190f86007dcf02dbe54268cbaef8a38dd27bbc4845385da3c81675f"	3600
TXT	"MS=BA2253D7E1150B9EBE811EFCA29701DD1B0F5378"	3600
TXT	"rk5c7ljusy"	3600
TXT	"miro-verification=c24ad48d3112d171af19a673c8ca014d1c012cf9"	3600
TXT	"v=spf1 ip4:141.7.97.34 ip4:217.30.49.101 ip4:217.30.49.102 ip4:217.30.49.103 ip4:217.30.49.104 ip4:217.146.24.49 include:spf.protection.outlook.com -all"	3600
TXT	"apple-domain-verification=klNd5SEi8Jkds7tQ"	3600
TXT	"cisco-ci-domain-verification=671030617d1e5485f0daba397688a1e9989d39dba8c0f25d54ba737eb26773af"	3600
TXT	"atlassian-domain-verification=mHkAqj7xIwY5oCDOxnrmnQO4MOO87vAanIcpGGXmZ6nqDpOpTesQTylMptfPxxfL"	3600
TXT	"MS=ms76974483"	3600
TXT	"amazonses:tX35oYkolw2vWlWWbieTep2Vr40qoW05phlm0BznNKg="	3600
CAA	0 issue "amazon.com"	600
CAA	0 issue "pki.dfn.de"	600
CAA	0 issue "amazontrust.com"	600
CAA	0 issue "letsencrypt.org"	600
CAA	0 issue "awstrust.com"	600
CAA	0 issue "harica.gr"	600
CAA	0 issue "amazonaws.com"	600
CAA	0 issue "sectigo.com"	600

Checks

✓ TTLs within range #32

TTLs: A 10m, 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.
✓ CAA restricts issuance #35

Certificates may be issued by: amazon.com, pki.dfn.de, amazontrust.com, letsencrypt.org, awstrust.com, harica.gr, amazonaws.com, sectigo.com.