Domain report: bfarm.de

Registration

info

.de country-code

Found

TLD: .de (country-code)
ICANN policies apply: no

Checks

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.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.
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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

dns-2.dfn.de, ns.bfarm.de

Found

Parent zone: de
Delegation from: a.nic.de (194.0.0.53)
NS at the parent: dns-2.dfn.de, ns.bfarm.de
NS in the zone: dns-2.dfn.de, ns.bfarm.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	-
ns.bfarm.de	192.124.251.129	AS680 DFN - Verein zur Foerderung eines Deutschen Forschungsnetzes e.V., DE	192.124.251.129

Checks

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2 nameservers

Two nameservers meet the minimum; RFC 2182 recommends three or more for important zones: dns-2.dfn.de, ns.bfarm.de.

#6
✓ 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: ns.bfarm.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 2 IPv4 /24s and 1 IPv6 /48.
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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): 3 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: ns.bfarm.de.

#13

Nameservers

warn

3 of 3 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
ns.bfarm.de 192.124.251.129	NOERROR, 11 ms, authoritative	no	yes / yes	refused	9.16.23-RH

Checks

✓ All respond #14

All 3 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.bfarm.de: "9.16.23-RH". 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 2026101238 · primary ns.bfarm.de

Found

Primary (MNAME): ns.bfarm.de
Contact (RNAME): hostmaster.bfarm.de
Serial: 2026101238
Refresh / retry: 10800 s / 3600 s
Expire: 1209600 s
Negative TTL: 86400 s

Serial per nameserver

Nameserver	Serial
dns-2.dfn.de (193.174.75.54)	2026101238
dns-2.dfn.de (2001:638:d:b102::1)	2026101238
ns.bfarm.de (192.124.251.129)	2026101238

Checks

✓ Serial 2026101238 everywhere #22

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

SOA refresh 3h, retry 1h, expire 14d, negative TTL 1d.
✓ Primary is a public nameserver #24

The primary nameserver ns.bfarm.de is one of the listed nameservers.
✓ Contact hostmaster@bfarm.de #25

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

The serial 2026101238 follows the YYYYMMDDnn convention (2026-10-12).

DNSSEC

info

Signed, DS published at parent

Found

Validated by resolver: yes
Denial of existence: NSEC
Signatures valid until: 9 November 2026

DS at the parent

Key tag	Algorithm	Digest	Matches a key
3409	ECDSAP256SHA256 (13)	SHA256 1FF7BBE8ACEBA139…	yes

DNSKEY in the zone

Key tag	Role	Algorithm
3409	KSK (257)	ECDSAP256SHA256 (13)
26287	ZSK (256)	ECDSAP256SHA256 (13)

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 3409 (SHA256).
✓ Modern algorithms #29

Key algorithms: ECDSAP256SHA256 (13).
✓ Signatures valid until 2026-11-09 #30

The earliest DNSKEY/SOA signature expires at 2026-11-09 00:59 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

info

16 records at the apex

Found

Read from: 193.174.75.54:53

Type	Value	TTL
SOA	ns.bfarm.de. hostmaster.bfarm.de. 2026101238 10800 3600 1209600 86400	86400
NS	dns-2.dfn.de.	86400
NS	ns.bfarm.de.	86400
A	80.245.152.209	86400
MX	10 mx-d1.bfarm.de.	3600
MX	20 mx-d2.bfarm.de.	3600
TXT	"adobe-idp-site-verification=ba31f935a00871e1215c0151b9606663ac1be43f402ed4a3974f1d1928372d0b"	3600
TXT	"cisco-ci-domain-verification=1889e478d5af4c3bea7a56bcc03c0f3307e5bfdd3352658c389e2613eb76de0d"	3600
TXT	"v=spf1 mx a:bfarm.de a:mx-out-d1.bfarm.de a:mx-out-d2.bfarm.de ip4:192.124.251.24 ip4:192.124.251.25 -all"	3600
TXT	"MS=ms61349655"	3600
TXT	"apple-domain-verification=EiJQPhA36myYW5Bw"	3600
TXT	"HARICA-sLUCoe8cpTb4hjoAzEh"	3600
TXT	"MS=ms71920108"	3600
TXT	"MS=ms70501672"	3600
TXT	"google-site-verification=r3ezDe9__oc3IoUMKWlA9nJUKUKtUlZIJJgMXA0G5PM"	3600
TXT	"D-TRUST=ZMGQUH9A8JI57FIKF8SKDSW"	3600

Checks

✓ TTLs within range #32

TTLs: A 1d, MX 1h, 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.
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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