Domain report: uni-vechta.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

warn

dns-2.dfn.de, dns01.uni-vechta.de, dns02.uni-vechta.de

Found

Parent zone: de
Delegation from: a.nic.de (194.0.0.53)
NS at the parent: dns-2.dfn.de, dns01.uni-vechta.de, dns02.uni-vechta.de
NS in the zone: dns-2.dfn.de, dns01.uni-vechta.de, dns02.uni-vechta.de

Nameserver	Addresses	Network (AS)	Glue
dns-2.dfn.de	193.174.75.54 2001:638:d:b102::1	AS680 DFN - Verein zur Foerderung eines Deutschen Forschungsnetzes e.V., DE AS680 DFN - Verein zur Foerderung eines Deutschen Forschungsnetzes e.V., DE	-
dns01.uni-vechta.de	131.173.82.1 2001:638:726:20::83ad:5201	AS680 DFN - Verein zur Foerderung eines Deutschen Forschungsnetzes e.V., DE AS680 DFN - Verein zur Foerderung eines Deutschen Forschungsnetzes e.V., DE	131.173.82.1
dns02.uni-vechta.de	131.173.82.2 2001:638:726:20::83ad:5202	AS680 DFN - Verein zur Foerderung eines Deutschen Forschungsnetzes e.V., DE AS680 DFN - Verein zur Foerderung eines Deutschen Forschungsnetzes e.V., DE	131.173.82.2

Checks

✓ 3 nameservers #6

Delegated to dns-2.dfn.de, dns01.uni-vechta.de, dns02.uni-vechta.de.
✓ Parent and zone agree #7

The parent delegation and the zone's NS records list the same nameservers.
!

Glue differs from the zone

The addresses at the parent (glue) differ from the addresses in the zone: dns01.uni-vechta.de (glue 131.173.82.1, zone 131.173.82.1, 2001:638:726:20::83ad:5201); dns02.uni-vechta.de (glue 131.173.82.2, zone 131.173.82.2, 2001:638:726:20::83ad:5202). Update the glue at your registrar.

#8
✓ 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 2 IPv4 /24s and 2 IPv6 /48s.
i

All nameservers in one AS

All nameserver addresses are announced by one network operator (AS680 (DFN - Verein zur Foerderung eines Deutschen Forschungsnetzes e.V., DE): 6 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
✓ All reachable over IPv6 #13

Every nameserver has an IPv6 address.

Nameservers

warn

6 of 6 addresses answer authoritatively

Found

Nameserver	Answer	Recursion	TCP / EDNS	AXFR	Version
dns-2.dfn.de 193.174.75.54	NOERROR, 7 ms, authoritative	no	yes / yes	refused	0
dns-2.dfn.de 2001:638:d:b102::1	NOERROR, 7 ms, authoritative	no	yes / yes	refused	0
dns01.uni-vechta.de 131.173.82.1	NOERROR, 15 ms, authoritative	no	yes / yes	refused	9.18.39-0ubuntu0.22.04.7-Ubuntu
dns01.uni-vechta.de 2001:638:726:20::83ad:5201	NOERROR, 15 ms, authoritative	no	yes / yes	refused	9.18.39-0ubuntu0.22.04.7-Ubuntu
dns02.uni-vechta.de 131.173.82.2	NOERROR, 15 ms, authoritative	no	yes / yes	refused	9.18.39-0ubuntu0.22.04.7-Ubuntu
dns02.uni-vechta.de 2001:638:726:20::83ad:5202	NOERROR, 15 ms, authoritative	no	yes / yes	refused	9.18.39-0ubuntu0.22.04.7-Ubuntu

Checks

✓ All respond #14

All 6 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: dns01.uni-vechta.de: "9.18.39-0ubuntu0.22.04.7-Ubuntu"; dns02.uni-vechta.de: "9.18.39-0ubuntu0.22.04.7-Ubuntu". 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 2026071078 · primary dns01.uni-vechta.de

Found

Primary (MNAME): dns01.uni-vechta.de
Contact (RNAME): postmaster.uni-vechta.de
Serial: 2026071078
Refresh / retry: 28800 s / 7200 s
Expire: 604800 s
Negative TTL: 3600 s

Serial per nameserver

Nameserver	Serial
dns-2.dfn.de (193.174.75.54)	2026071078
dns-2.dfn.de (2001:638:d:b102::1)	2026071078
dns01.uni-vechta.de (131.173.82.1)	2026071078
dns01.uni-vechta.de (2001:638:726:20::83ad:5201)	2026071078
dns02.uni-vechta.de (131.173.82.2)	2026071078
dns02.uni-vechta.de (2001:638:726:20::83ad:5202)	2026071078

Checks

✓ Serial 2026071078 everywhere #22

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

SOA refresh 8h, retry 2h, expire 7d, negative TTL 1h.
✓ Primary is a public nameserver #24

The primary nameserver dns01.uni-vechta.de is one of the listed nameservers.
✓ Contact postmaster@uni-vechta.de #25

The SOA RNAME postmaster.uni-vechta.de means postmaster@uni-vechta.de.
✓ Date-based serial #26

The serial 2026071078 follows the YYYYMMDDnn convention (2026-07-10).

DNSSEC

info

Signed, DS published at parent

Found

Validated by resolver: yes
Denial of existence: NSEC
Signatures valid until: 4 November 2026

DS at the parent

Key tag	Algorithm	Digest	Matches a key
53217	RSASHA512 (10)	SHA256 85290FD99AB89108…	yes

DNSKEY in the zone

Key tag	Role	Algorithm
14342	ZSK (256)	RSASHA512 (10)
53217	KSK (257)	RSASHA512 (10)

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 53217 (SHA256).
✓ Modern algorithms #29

Key algorithms: RSASHA512 (10).
✓ Signatures valid until 2026-11-04 #30

The earliest DNSKEY/SOA signature expires at 2026-11-04 12:07 UTC.
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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

pass

19 records at the apex

Found

Read from: 193.174.75.54:53

Type	Value	TTL
SOA	dns01.uni-vechta.de. postmaster.uni-vechta.de. 2026071078 28800 7200 604800 3600	3600
NS	dns02.uni-vechta.de.	3600
NS	dns-2.dfn.de.	3600
NS	dns01.uni-vechta.de.	3600
A	131.173.82.3	3600
MX	10 b1181.mx.srv.dfn.de.	3600
MX	10 a1181.mx.srv.dfn.de.	3600
MX	10 c1181.mx.srv.dfn.de.	3600
TXT	"fa7c9904faebaf13ca50d88ab2f3d99a"	3600
TXT	"google-site-verification=2LBsU-m4mQjcoCELTXZtCPQB7RdWfah5i-I1kTNHEfQ"	3600
TXT	"infoblox-domain-mastery=b40e1074d86fea824eaa9231d9352bf49de42ba7464fdf81067d65f9b1248f59ee"	3600
TXT	"offensity-domain-verification=e88f8234188346c50d87431e2ff883a037b8bf71c1a3c9232c909c2ddf167427"	3600
TXT	"v=spf1 mx ip4:131.173.80.0/21 ip4:193.174.240.41 ip4:195.37.138.56/32 ip4:130.75.2.115/32 ip4:130.75.2.114 ip4:130.75.166.214/32 ip4:195.38.20.0/24 ip4:131.173.80.250 a:smtpss.uni-vechta.de include:spf.crsend.com -all"	3600
TXT	"apple-domain-verification=lXqq9IYerfuUvN0B"	3600
TXT	"MS=49AE2F419B089459F1422995E0E5B4FE5DEDABB7"	3600
CAA	0 issue "sectigo.com"	3600
CAA	0 issue "pki.dfn.de"	3600
CAA	0 issue "harica.gr"	3600
CAA	0 issue "letsencrypt.org"	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.
✓ CAA restricts issuance #35

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