unimedizin-mainz.de

Checked 22 October 2026, 00:50 UTC · via 8.8.8.8
✗Problems found
21 passed 2 warnings 1 failed 5 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

warn

dns1.unimedizin-mainz.de, dns2.unimedizin-mainz.de, dns3.unimedizin-mainz.de

Found

Parent zone
de
Delegation from
a.nic.de (194.0.0.53)
NS at the parent
dns1.unimedizin-mainz.de, dns2.unimedizin-mainz.de, dns3.unimedizin-mainz.de
NS in the zone
dns1.unimedizin-mainz.de, dns2.unimedizin-mainz.de, dns3.unimedizin-mainz.de
NameserverAddressesNetwork (AS)Glue
dns1.unimedizin-mainz.de134.93.123.15AS2857 RLP-NET - Johannes Gutenberg-Universitaet Mainz, DE134.93.123.15
dns2.unimedizin-mainz.de134.93.123.10AS2857 RLP-NET - Johannes Gutenberg-Universitaet Mainz, DE134.93.123.10
dns3.unimedizin-mainz.de46.163.76.185AS8972 GD-EMEA-DC-SXB1 - Host Europe GmbH, DE46.163.76.185

Checks

  • ✓ 3 nameservers #6
    Delegated to dns1.unimedizin-mainz.de, dns2.unimedizin-mainz.de, dns3.unimedizin-mainz.de.
  • ✓ 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: dns1.unimedizin-mainz.de, dns2.unimedizin-mainz.de, dns3.unimedizin-mainz.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 0 IPv6 /48s.
  • ✓ 2 autonomous systems #11
    The nameservers are spread over: AS2857 (RLP-NET - Johannes Gutenberg-Universitaet Mainz, DE): 2 addresses; AS8972 (GD-EMEA-DC-SXB1 - Host Europe GmbH, DE): 1 address.
  • 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
  • !
    No IPv6
    None of the nameservers has an IPv6 address, so IPv6-only resolvers can't reach them.
    #13

Nameservers

fail

3 of 3 addresses answer authoritatively

Found

NameserverAnswerRecursionTCP / EDNSAXFRVersion
dns1.unimedizin-mainz.de 134.93.123.15NOERROR, 4 ms, authoritativenoyes / yesrefused[SECURED]
dns2.unimedizin-mainz.de 134.93.123.10NOERROR, 4 ms, authoritativenoyes / yesALLOWED (258 records)[SECURED]
dns3.unimedizin-mainz.de 46.163.76.185NOERROR, 7 ms, authoritativenoyes / yesALLOWED (258 records)-

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.
  • i
    Identifying string disclosed
    These nameservers answer version queries with a string that is not a version number: dns1.unimedizin-mainz.de: "[SECURED]"; dns2.unimedizin-mainz.de: "[SECURED]".
    #17
  • ✗
    Zone transfer allowed
    These nameservers send the complete zone to anyone who asks (AXFR), exposing all host names: dns2.unimedizin-mainz.de (134.93.123.10): 258 records; dns3.unimedizin-mainz.de (46.163.76.185): 258 records. Restrict zone transfers to your secondary servers.
    #18
  • ✓ 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 2026090902 · primary dns1.unimedizin-mainz.de

Found

Primary (MNAME)
dns1.unimedizin-mainz.de
Contact (RNAME)
dnsadmin.netz.klinik.uni-mainz.de
Serial
2026090902
Refresh / retry
7200 s / 1800 s
Expire
2592000 s
Negative TTL
3600 s

Serial per nameserver

NameserverSerial
dns1.unimedizin-mainz.de (134.93.123.15)2026090902
dns2.unimedizin-mainz.de (134.93.123.10)2026090902
dns3.unimedizin-mainz.de (46.163.76.185)2026090902

Checks

  • ✓ Serial 2026090902 everywhere #22
    All nameservers serve the same version of the zone.
  • ✓ Timers within recommendations #23
    SOA refresh 2h, retry 30m, expire 30d, negative TTL 1h.
  • ✓ Primary is a public nameserver #24
    The primary nameserver dns1.unimedizin-mainz.de is one of the listed nameservers.
  • ✓ Contact dnsadmin@netz.klinik.uni-mainz.de #25
    The SOA RNAME dnsadmin.netz.klinik.uni-mainz.de means dnsadmin@netz.klinik.uni-mainz.de.
  • ✓ Date-based serial #26
    The serial 2026090902 follows the YYYYMMDDnn convention (2026-09-09).

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

info

11 records at the apex

Found

Read from
134.93.123.15:53
TypeValueTTL
SOAdns1.unimedizin-mainz.de. dnsadmin.netz.klinik.uni-mainz.de. 2026090902 7200 1800 2592000 3600300
NSdns1.unimedizin-mainz.de.300
NSdns3.unimedizin-mainz.de.300
NSdns2.unimedizin-mainz.de.300
A134.93.123.60600
MX10 mx01.unimedizin-mainz.de.300
TXT"MS=ms90568431"300
TXT"apple-domain-verification=dOgBElGvBy9pT4oA"300
TXT"E7V C8B N3F"300
TXT"7d5228cf3c797d63ca7c60952a54fd73"300
TXT"v=spf1 mx ip4:134.93.123.203 -all"300

Checks

  • ✓ TTLs within range #32
    TTLs: A 10m, MX 5m, NS 5m. The NS TTL at the parent is 1d and in the zone 5m; 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.
  • i
    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