th-deg.de

Checked 22 October 2026, 00:40 UTC · via 8.8.8.8
!Passed with warnings
20 passed 2 warnings 0 failed 7 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-1.dfn.de, dns-3.dfn.de, ns1.fh-deggendorf.de

Found

Parent zone
de
Delegation from
a.nic.de (194.0.0.53)
NS at the parent
dns-1.dfn.de, dns-3.dfn.de, ns1.fh-deggendorf.de
NS in the zone
dns-1.dfn.de, dns-3.dfn.de, ns1.fh-deggendorf.de
NameserverAddressesNetwork (AS)Glue
dns-1.dfn.de193.174.75.50 2001:638:d:b101::1AS680 DFN - Verein zur Foerderung eines Deutschen Forschungsnetzes e.V., DE AS680 DFN - Verein zur Foerderung eines Deutschen Forschungsnetzes e.V., DE-
dns-3.dfn.de193.174.75.58 2001:638:d:b103::1AS680 DFN - Verein zur Foerderung eines Deutschen Forschungsnetzes e.V., DE AS680 DFN - Verein zur Foerderung eines Deutschen Forschungsnetzes e.V., DE-
ns1.fh-deggendorf.de194.95.98.61AS680 DFN - Verein zur Foerderung eines Deutschen Forschungsnetzes e.V., DE194.95.98.61

Checks

  • ✓ 3 nameservers #6
    Delegated to dns-1.dfn.de, dns-3.dfn.de, ns1.fh-deggendorf.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.
  • i
    One address family in one network
    all IPv6 addresses are in 2001:638:d::/48, while the other address family is spread over several networks.
    #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): 5 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: ns1.fh-deggendorf.de.
    #13

Nameservers

warn

5 of 5 addresses answer authoritatively

Found

NameserverAnswerRecursionTCP / EDNSAXFRVersion
dns-1.dfn.de 193.174.75.50NOERROR, 12 ms, authoritativenoyes / yesrefused0
dns-1.dfn.de 2001:638:d:b101::1NOERROR, 14 ms, authoritativenoyes / yesrefused0
dns-3.dfn.de 193.174.75.58NOERROR, 10 ms, authoritativenoyes / yesrefused0
dns-3.dfn.de 2001:638:d:b103::1NOERROR, 8 ms, authoritativenoyes / yesrefused0
ns1.fh-deggendorf.de 194.95.98.61NOERROR, 13 ms, authoritativenoyes / yesrefused9.16.50-Debian

Checks

  • ✓ All respond #14
    All 5 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: ns1.fh-deggendorf.de: "9.16.50-Debian". 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 2026102209 · primary ns1.fh-deggendorf.de

Found

Primary (MNAME)
ns1.fh-deggendorf.de
Contact (RNAME)
hostmaster.fh-deggendorf.de
Serial
2026102209
Refresh / retry
86400 s / 28800 s
Expire
604800 s
Negative TTL
28800 s

Serial per nameserver

NameserverSerial
dns-1.dfn.de (193.174.75.50)2026102209
dns-1.dfn.de (2001:638:d:b101::1)2026102209
dns-3.dfn.de (193.174.75.58)2026102209
dns-3.dfn.de (2001:638:d:b103::1)2026102209
ns1.fh-deggendorf.de (194.95.98.61)2026102209

Checks

  • ✓ Serial 2026102209 everywhere #22
    All nameservers serve the same version of the zone.
  • ✓ Timers within recommendations #23
    SOA refresh 1d, retry 8h, expire 7d, negative TTL 8h.
  • ✓ Primary is a public nameserver #24
    The primary nameserver ns1.fh-deggendorf.de is one of the listed nameservers.
  • ✓ Contact hostmaster@fh-deggendorf.de #25
    The SOA RNAME hostmaster.fh-deggendorf.de means hostmaster@fh-deggendorf.de.
  • ✓ Date-based serial #26
    The serial 2026102209 follows the YYYYMMDDnn convention (2026-10-22).

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

20 records at the apex

Found

Read from
193.174.75.50:53
TypeValueTTL
SOAns1.fh-deggendorf.de. hostmaster.fh-deggendorf.de. 2026102209 86400 28800 604800 2880086400
NSdns-1.dfn.de.86400
NSns1.fh-deggendorf.de.86400
NSdns-3.dfn.de.86400
A195.37.242.201300
MX10 c2821.mx.srv.dfn.de.3600
MX10 a2821.mx.srv.dfn.de.3600
MX10 b2821.mx.srv.dfn.de.3600
TXT"google-site-verification=dlrnuAT41t8_oygbB_GWH0we_N3pNrtiM6HnFX2MfWA"3600
TXT"MS=F7BE8A8171094F0DAB9C21FE0397462482D27B52"3600
TXT"HARICA-9vajM92ibZPjERzBy7z"3600
TXT"google-site-verification=y8nl8P9skvUFNBGFN6RTZAPV_P8-6KaS5hg_3i-r39I"3600
TXT"ZOOM_verify_DmFjW_cORb-dnqRU2CYilQ"3600
TXT"adobe-idp-site-verification=5d7d0a2cefcf5ac79592560fee58362ef1f8dce01186b4cc53a9d70845171fbb"3600
TXT"apple-domain-verification=FaF2Ex1fHclLG1G2"3600
TXT"ZOOM_verify_49VZ89OES7i8SfBWigpvqA"3600
TXT"MS=D9B22722AE148A0477548A45B6E603FE8A990D19"3600
TXT"v=spf1 include:_spf.th-deg.de ~all"3600
TXT"google-site-verification=q0uj3CORwLwJNWzeus7a1ldhhK7Awt9VTpfnYYinMLo"3600
TXT"google-site-verification=qNGLcswMnW9BsYYVu4lbulwV91WFwXX9WHivTW0EkXs"3600

Checks

  • ✓ TTLs within range #32
    TTLs: A 5m, 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.
  • 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