Domain report: fht-esslingen.de

Registration

info

.de country-code

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

info

dns1.belwue.de, dns1.hs-esslingen.de, dns3.belwue.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
dns1.hs-esslingen.de	134.108.44.53	AS553 BELWUE - Universitaet Stuttgart, DE	134.108.44.53
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

✓ 3 nameservers #6

Delegated to dns1.belwue.de, dns1.hs-esslingen.de, dns3.belwue.de.
✓ 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.
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): 5 addresses). An outage or attack on that network affects all nameservers; large anycast providers mitigate this, but a secondary DNS provider adds independence.

#11
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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
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Partly IPv6

These nameservers have no IPv6 address: dns1.hs-esslingen.de.

#13

warn

5 of 5 addresses answer authoritatively

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, 12 ms, authoritative	no	yes / yes	refused	PowerDNS Authoritative Server 4.5.5 (built Dec 8 2022 18:24:18 by root@a309361b6303)
dns1.hs-esslingen.de 134.108.44.53	NOERROR, 8 ms, authoritative	no	yes / yes	refused	-
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, 8 ms, authoritative	no	yes / yes	refused	PowerDNS Authoritative Server 4.5.5 (built Dec 8 2022 18:24:18 by root@a309361b6303)

✓ 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: 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)". 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.

pass

serial 2610211525 · primary dns1.hs-esslingen.de

✓ Serial 2610211525 everywhere #22

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

SOA refresh 310m, retry 30m, expire 28d, negative TTL 1d.
✓ Primary is a public nameserver #24

The primary nameserver dns1.hs-esslingen.de is one of the listed nameservers.
✓ Contact hostmaster@hs-esslingen.de #25

The SOA RNAME hostmaster.hs-esslingen.de means hostmaster@hs-esslingen.de.
✓ Timestamp serial #26

The serial 2610211525 is a Unix timestamp (2052-09-17 18:45 UTC).

warn

Not signed

info

6 records at the apex

Type	Value	TTL
SOA	dns1.hs-esslingen.de. hostmaster.hs-esslingen.de. 2610211525 18600 1800 2419200 86400	86400
NS	dns1.hs-esslingen.de.	86400
NS	dns1.BelWue.de.	86400
NS	dns3.BelWue.de.	86400
A	134.108.34.23	86400
TXT	"cisco-ci-domain-verification=658bc31e942a1eedb1f1a34b6ff19771ce7c21a1c3c58a909d5e42eeecbc0f59"	86400