Domain report: uba.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

warn

dns-1.dfn.de, dns-2.dfn.de, dns-3.dfn.de

Nameserver	Addresses	Network (AS)	Glue
dns-1.dfn.de	193.174.75.50 2001:638:d:b101::1	AS680 DFN - Verein zur Foerderung eines Deutschen Forschungsnetzes e.V., DE AS680 DFN - Verein zur Foerderung eines Deutschen Forschungsnetzes e.V., DE	-
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	-
dns-3.dfn.de	193.174.75.58 2001:638:d:b103::1	AS680 DFN - Verein zur Foerderung eines Deutschen Forschungsnetzes e.V., DE AS680 DFN - Verein zur Foerderung eines Deutschen Forschungsnetzes e.V., DE	-

✓ 3 nameservers #6

Delegated to dns-1.dfn.de, dns-2.dfn.de, dns-3.dfn.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.
!

Nameservers in one network

all IPv4 addresses are in 193.174.75.0/24; all IPv6 addresses are in 2001:638:d::/48. A single network failure takes all nameservers down; RFC 2182 recommends topologically separate networks (anycast setups are an exception).

#10
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.

info

6 of 6 addresses answer authoritatively

Nameserver	Answer	Recursion	TCP / EDNS	AXFR
dns-1.dfn.de 193.174.75.50	NOERROR, 14 ms, authoritative	no	yes / yes	refused
dns-1.dfn.de 2001:638:d:b101::1	NOERROR, 18 ms, authoritative	no	yes / yes	refused
dns-2.dfn.de 193.174.75.54	NOERROR, 7 ms, authoritative	no	yes / yes	refused
dns-2.dfn.de 2001:638:d:b102::1	NOERROR, 7 ms, authoritative	no	yes / yes	refused
dns-3.dfn.de 193.174.75.58	NOERROR, 10 ms, authoritative	no	yes / yes	refused
dns-3.dfn.de 2001:638:d:b103::1	NOERROR, 13 ms, authoritative	no	yes / yes	refused

✓ 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.
i

Identifying string disclosed

These nameservers answer version queries with a string that is not a version number: dns-1.dfn.de: "0"; dns-2.dfn.de: "0"; dns-3.dfn.de: "0".

#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.

info

serial 329 · primary de-inf-111-d.uba.de

✓ Serial 329 everywhere #22

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

SOA refresh 6h, retry 1h, expire 7d, negative TTL 1d.
i

Hidden master

The primary nameserver de-inf-111-d.uba.de is not listed as a nameserver: a hidden master that only feeds the public secondaries. That is a common setup; make sure it is not reachable for zone transfers from outside.

#24
✓ Contact hostmaster@uba.de #25

The SOA RNAME hostmaster.uba.de means hostmaster@uba.de.
✓ Counter serial #26

The serial 329 is a plain counter.

warn

Not signed

info

9 records at the apex

Type	Value	TTL
SOA	de-inf-111-d.uba.de. hostmaster.uba.de. 329 21600 3600 604800 86400	21600
NS	dns-3.dfn.de.	86400
NS	dns-2.dfn.de.	86400
NS	dns-1.dfn.de.	86400
MX	10 mail1.uba.de.	300
TXT	"cisco-ci-domain-verification=b2a9c06c66d698ae5c4a74ca3e8423ce5924638bb0cdeb5403a2b677da457b1"	86400
TXT	"MS=ms64542679"	86400
TXT	"v=spf1 mx ip4:193.174.175.166 -all"	86400
TXT	"MS=FD50412D1704BE1CFDDF97F0DC831156854EB187"	86400