hs-wismar.de

Checked 21 October 2026, 22:51 UTC · via 8.8.8.8
!Passed with warnings
22 passed 1 warning 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

deneb.dfn.de, george.ns.uni-rostock.de, kermit.hs-wismar.de, ringo.ns.uni-rostock.de, statler.hs-wismar.de

Found

Parent zone
de
Delegation from
a.nic.de (194.0.0.53)
NS at the parent
deneb.dfn.de, george.ns.uni-rostock.de, kermit.hs-wismar.de, ringo.ns.uni-rostock.de, statler.hs-wismar.de
NS in the zone
deneb.dfn.de, george.ns.uni-rostock.de, kermit.hs-wismar.de, ringo.ns.uni-rostock.de, statler.hs-wismar.de
NameserverAddressesNetwork (AS)Glue
deneb.dfn.de192.76.176.9 2001:638:800:1::9AS680 DFN - Verein zur Foerderung eines Deutschen Forschungsnetzes e.V., DE AS680 DFN - Verein zur Foerderung eines Deutschen Forschungsnetzes e.V., DE-
george.ns.uni-rostock.de139.30.255.118 2001:638:804:bf::118AS680 DFN - Verein zur Foerderung eines Deutschen Forschungsnetzes e.V., DE AS680 DFN - Verein zur Foerderung eines Deutschen Forschungsnetzes e.V., DE139.30.255.118 2001:638:804:bf::118
kermit.hs-wismar.de192.76.157.9AS680 DFN - Verein zur Foerderung eines Deutschen Forschungsnetzes e.V., DE192.76.157.9
ringo.ns.uni-rostock.de139.30.255.117 2001:638:804:bf::117AS680 DFN - Verein zur Foerderung eines Deutschen Forschungsnetzes e.V., DE AS680 DFN - Verein zur Foerderung eines Deutschen Forschungsnetzes e.V., DE139.30.255.117 2001:638:804:bf::117
statler.hs-wismar.de192.76.157.4AS680 DFN - Verein zur Foerderung eines Deutschen Forschungsnetzes e.V., DE192.76.157.4

Checks

  • ✓ 5 nameservers #6
    Delegated to deneb.dfn.de, george.ns.uni-rostock.de, kermit.hs-wismar.de, ringo.ns.uni-rostock.de, statler.hs-wismar.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: kermit.hs-wismar.de, statler.hs-wismar.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 3 IPv4 /24s and 2 IPv6 /48s.
  • 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): 8 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: kermit.hs-wismar.de, statler.hs-wismar.de.
    #13

Nameservers

info

8 of 8 addresses answer authoritatively

Found

NameserverAnswerRecursionTCP / EDNSAXFRVersion
deneb.dfn.de 192.76.176.9NOERROR, 14 ms, authoritativenoyes / yesrefused0
deneb.dfn.de 2001:638:800:1::9NOERROR, 14 ms, authoritativenoyes / yesrefused0
george.ns.uni-rostock.de 139.30.255.118NOERROR, 20 ms, authoritativenoyes / yesrefused-
george.ns.uni-rostock.de 2001:638:804:bf::118NOERROR, 20 ms, authoritativenoyes / yesrefused-
kermit.hs-wismar.de 192.76.157.9NOERROR, 18 ms, authoritativenoyes / yesrefusednone
ringo.ns.uni-rostock.de 139.30.255.117NOERROR, 20 ms, authoritativenoyes / yesrefused-
ringo.ns.uni-rostock.de 2001:638:804:bf::117NOERROR, 23 ms, authoritativenoyes / yesrefused-
statler.hs-wismar.de 192.76.157.4NOERROR, 21 ms, authoritativenoyes / yesrefusednone

Checks

  • ✓ All respond #14
    All 8 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: deneb.dfn.de: "0"; kermit.hs-wismar.de: "none"; statler.hs-wismar.de: "none".
    #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 2026093001 · primary statler.hs-wismar.de

Found

Primary (MNAME)
statler.hs-wismar.de
Contact (RNAME)
hostmaster.hs-wismar.de
Serial
2026093001
Refresh / retry
14400 s / 3600 s
Expire
1209600 s
Negative TTL
1800 s

Serial per nameserver

NameserverSerial
deneb.dfn.de (192.76.176.9)2026093001
deneb.dfn.de (2001:638:800:1::9)2026093001
george.ns.uni-rostock.de (139.30.255.118)2026093001
george.ns.uni-rostock.de (2001:638:804:bf::118)2026093001
kermit.hs-wismar.de (192.76.157.9)2026093001
ringo.ns.uni-rostock.de (139.30.255.117)2026093001
ringo.ns.uni-rostock.de (2001:638:804:bf::117)2026093001
statler.hs-wismar.de (192.76.157.4)2026093001

Checks

  • ✓ Serial 2026093001 everywhere #22
    All nameservers serve the same version of the zone.
  • ✓ Timers within recommendations #23
    SOA refresh 4h, retry 1h, expire 14d, negative TTL 30m.
  • ✓ Primary is a public nameserver #24
    The primary nameserver statler.hs-wismar.de is one of the listed nameservers.
  • ✓ Contact hostmaster@hs-wismar.de #25
    The SOA RNAME hostmaster.hs-wismar.de means hostmaster@hs-wismar.de.
  • ✓ Date-based serial #26
    The serial 2026093001 follows the YYYYMMDDnn convention (2026-09-30).

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

20 records at the apex

Found

Read from
192.76.176.9:53
TypeValueTTL
SOAstatler.hs-wismar.de. hostmaster.hs-wismar.de. 2026093001 14400 3600 1209600 1800300
NSkermit.hs-wismar.de.300
NSringo.ns.uni-rostock.de.300
NSstatler.hs-wismar.de.300
NSdeneb.dfn.de.300
NSgeorge.ns.uni-rostock.de.300
A141.53.15.120300
MX10 rz-mxin002.hs-wismar.de.300
MX10 rz-mxin001.hs-wismar.de.300
TXT"apple-domain-verification=pJJW5OahXaQLx0dK"300
TXT"have-i-been-pwned-verification=dweb_dtfyodea30kjts98ssnaxtg8"300
TXT"adobe-idp-site-verification=9dcbbfd848388db1b08c9958fad6ff12402ac7c373b3422edd6c6fc268c478fc"300
TXT"v=spf1 mx ip4:192.76.157.128/28 ip4:212.201.38.192/27 ip4:193.174.240.41/32 ~all"300
TXT"MS=ms35779881"300
TXT"google-site-verification=aaSpYd3hPtqlQl0g_dPRXOZ7IItn34WeLByWJ2E5odk"300
CAA0 issue "letsencrypt.org"300
CAA0 issuewild ";"300
CAA0 issue "sectigo.com"300
CAA0 issue "harica.gr"300
CAA0 issuemail "harica.gr"300

Checks

  • ✓ TTLs within range #32
    TTLs: A 5m, 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.
  • ✓ CAA restricts issuance #35
    Certificates may be issued by: letsencrypt.org, none (issuance forbidden), sectigo.com, harica.gr.