umwelt-campus.de

Checked 22 October 2026, 00:50 UTC · via 8.8.8.8
!Passed with warnings
21 passed 2 warnings 0 failed 6 info

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

dns.fh-trier.de, ns.umwelt-campus.de

Found

Parent zone
de
Delegation from
a.nic.de (194.0.0.53)
NS at the parent
dns.fh-trier.de, ns.umwelt-campus.de
NS in the zone
dns.fh-trier.de, ns.umwelt-campus.de
NameserverAddressesNetwork (AS)Glue
dns.fh-trier.de143.93.54.7 2001:4c80:64:360::7:0AS2857 RLP-NET - Johannes Gutenberg-Universitaet Mainz, DE AS2857 RLP-NET - Johannes Gutenberg-Universitaet Mainz, DE143.93.54.7 2001:4c80:64:360::7:0
ns.umwelt-campus.de143.93.32.2AS2857 RLP-NET - Johannes Gutenberg-Universitaet Mainz, DE143.93.32.2

Checks

  • i
    2 nameservers
    Two nameservers meet the minimum; RFC 2182 recommends three or more for important zones: dns.fh-trier.de, ns.umwelt-campus.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.umwelt-campus.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.
  • i
    All nameservers in one AS
    All nameserver addresses are announced by one network operator (AS2857 (RLP-NET - Johannes Gutenberg-Universitaet Mainz, 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
  • 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: ns.umwelt-campus.de.
    #13

Nameservers

warn

3 of 3 addresses answer authoritatively

Found

NameserverAnswerRecursionTCP / EDNSAXFRVersion
dns.fh-trier.de 143.93.54.7NOERROR, 7 ms, authoritativenoyes / yesrefused0.0.0
dns.fh-trier.de 2001:4c80:64:360::7:0NOERROR, 8 ms, authoritativenoyes / yesrefused0.0.0
ns.umwelt-campus.de 143.93.32.2NOERROR, 6 ms, authoritativenoyes / yesrefused-

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: dns.fh-trier.de: "0.0.0". 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 2026100501 · primary ns.umwelt-campus.de

Found

Primary (MNAME)
ns.umwelt-campus.de
Contact (RNAME)
ns-admin.umwelt-campus.de
Serial
2026100501
Refresh / retry
10800 s / 3600 s
Expire
1814400 s
Negative TTL
86400 s

Serial per nameserver

NameserverSerial
dns.fh-trier.de (143.93.54.7)2026100501
dns.fh-trier.de (2001:4c80:64:360::7:0)2026100501
ns.umwelt-campus.de (143.93.32.2)2026100501

Checks

  • ✓ Serial 2026100501 everywhere #22
    All nameservers serve the same version of the zone.
  • ✓ Timers within recommendations #23
    SOA refresh 3h, retry 1h, expire 21d, negative TTL 1d.
  • ✓ Primary is a public nameserver #24
    The primary nameserver ns.umwelt-campus.de is one of the listed nameservers.
  • ✓ Contact ns-admin@umwelt-campus.de #25
    The SOA RNAME ns-admin.umwelt-campus.de means ns-admin@umwelt-campus.de.
  • ✓ Date-based serial #26
    The serial 2026100501 follows the YYYYMMDDnn convention (2026-10-05).

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

21 records at the apex

Found

Read from
143.93.54.7:53
TypeValueTTL
SOAns.umwelt-campus.de. ns-admin.umwelt-campus.de. 2026100501 10800 3600 1814400 8640010800
NSdns.fh-trier.de.10800
NSns.umwelt-campus.de.10800
A143.93.54.11410800
MX10 mx1.umwelt-campus.de.10800
MX10 mx4.umwelt-campus.de.10800
TXT"v=spf1 mx ip4:143.93.47.10 ip4:143.93.47.11 ip4:143.93.47.12 ip4:143.93.47.13 ip4:143.93.47.14 ~all"10800
TXT"adobe-idp-site-verification=8cc468706573fef8835ec3676ae8782a924548b58562d24b1ca78a720ed7b0c6"10800
TXT"HARICA-ijHrp2yJNfO8L3UdXHQ"10800
TXT"MS=E633B8758DEB5D262B22C6EF67190FC727950E7D"10800
TXT"ZA=IFbn/42/WZNhS7+8/Xi5QIRhOw0h0Kb2jgfSklAYS+4="10800
TXT"google-site-verification=u09nkSLq9Vr1KQE0pQzRAO_Bm5qwNnkgjTjT1ZkmQs0"10800
TXT"MS=ms85984119"10800
CAA0 issue "dfn.de"10800
CAA0 issue "sectigo.com"10800
CAA0 issue "letsencrypt.org"10800
CAA0 iodef "mailto:ip-admin@hochschule-trier.de"10800
CAA0 issue "harica.gr"10800
CAA0 issue "telesec.de"10800
CAA0 issuewild ";"10800
CAA0 issue "pki.dfn.de"10800

Checks

  • ✓ TTLs within range #32
    TTLs: A 3h, MX 3h, NS 3h. The NS TTL at the parent is 1d and in the zone 3h; 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: dfn.de, sectigo.com, letsencrypt.org, harica.gr, telesec.de, none (issuance forbidden), pki.dfn.de.