hs-worms.de

Checked 21 October 2026, 22:51 UTC · via 8.8.8.8
✗Problems found
21 passed 3 warnings 1 failed 4 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

ns-auth.rptu.de, ns-sec.hs-worms.de, ns.hs-worms.de

Found

Parent zone
de
Delegation from
a.nic.de (194.0.0.53)
NS at the parent
ns-auth.rptu.de, ns-sec.hs-worms.de, ns.hs-worms.de
NS in the zone
ns-auth.rptu.de, ns-sec.hs-worms.de, ns.hs-worms.de
NameserverAddressesNetwork (AS)Glue
ns-auth.rptu.de131.246.9.117 131.246.1.117 2a03:63c0::53:1002 2a03:63c0::53:1001AS199578 UNIKL - Rheinland-Pfaelzische Technische Universitaet Kaiserslautern-Landau, DE AS199578 UNIKL - Rheinland-Pfaelzische Technische Universitaet Kaiserslautern-Landau, DE AS199578 UNIKL - Rheinland-Pfaelzische Technische Universitaet Kaiserslautern-Landau, DE AS199578 UNIKL - Rheinland-Pfaelzische Technische Universitaet Kaiserslautern-Landau, DE-
ns-sec.hs-worms.de193.30.18.2 2001:4c80:81:1200::2AS2857 RLP-NET - Johannes Gutenberg-Universitaet Mainz, DE AS2857 RLP-NET - Johannes Gutenberg-Universitaet Mainz, DE193.30.18.2 2001:4c80:81:1200::2
ns.hs-worms.de143.93.160.9 2001:4c80:81:a000::9AS2857 RLP-NET - Johannes Gutenberg-Universitaet Mainz, DE AS2857 RLP-NET - Johannes Gutenberg-Universitaet Mainz, DE143.93.160.9 2001:4c80:81:a000::9

Checks

  • ✓ 3 nameservers #6
    Delegated to ns-auth.rptu.de, ns-sec.hs-worms.de, ns.hs-worms.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: ns-sec.hs-worms.de, ns.hs-worms.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 4 IPv4 /24s and 2 IPv6 /48s.
  • ✓ 2 autonomous systems #11
    The nameservers are spread over: AS199578 (UNIKL - Rheinland-Pfaelzische Technische Universitaet Kaiserslautern-Landau, DE): 4 addresses; AS2857 (RLP-NET - Johannes Gutenberg-Universitaet Mainz, DE): 4 addresses.
  • 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.

Nameservers

fail

8 of 8 addresses answer authoritatively

Found

NameserverAnswerRecursionTCP / EDNSAXFRVersion
ns-auth.rptu.de 131.246.9.117NOERROR, 8 ms, authoritativenoyes / yesrefused9.20.29-1~deb13u1-Debian
ns-auth.rptu.de 131.246.1.117NOERROR, 8 ms, authoritativenoyes / yesrefused9.20.29-1~deb13u1-Debian
ns-auth.rptu.de 2a03:63c0::53:1002NOERROR, 12 ms, authoritativenoyes / yesrefused9.20.29-1~deb13u1-Debian
ns-auth.rptu.de 2a03:63c0::53:1001NOERROR, 12 ms, authoritativenoyes / yesrefused9.20.29-1~deb13u1-Debian
ns-sec.hs-worms.de 193.30.18.2NOERROR, 5 ms, authoritativenoyes / yesrefused9.20.30
ns-sec.hs-worms.de 2001:4c80:81:1200::2NOERROR, 6 ms, authoritativenoyes / yesrefused9.20.30
ns.hs-worms.de 143.93.160.9NOERROR, 5 ms, authoritativenono / yesrefused9.20.30
ns.hs-worms.de 2001:4c80:81:a000::9NOERROR, 5 ms, authoritativenono / yesrefused9.20.30

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.
  • !
    Software version disclosed
    These nameservers report their software version via version.bind/version.server, which helps attackers find known vulnerabilities: ns-auth.rptu.de: "9.20.29-1~deb13u1-Debian"; ns-sec.hs-worms.de: "9.20.30"; ns.hs-worms.de: "9.20.30". Hide or replace the version string.
    #17
  • ✓ Zone transfers refused #18
    No nameserver allows a zone transfer to the public.
  • ✗
    No DNS over TCP
    DNS over TCP is required (RFC 7766); without it, large answers such as DNSSEC responses fail. Not answering over TCP: ns.hs-worms.de (143.93.160.9): dial tcp 143.93.160.9:53: i/o timeout; ns.hs-worms.de (2001:4c80:81:a000::9): read tcp [2a01:4f8:1c1c:eebf::1]:45564->[2001:4c80:81:a000::9]:53: i/o timeout.
    #19
  • ✓ EDNS supported #20
    All nameservers support EDNS(0).
  • ✓ Public addresses #21
    All nameserver addresses are publicly routable.

SOA

warn

serial 2026102100 · primary ns.hs-worms.de

Found

Primary (MNAME)
ns.hs-worms.de
Contact (RNAME)
named-admin.hs-worms.de
Serial
2026102100
Refresh / retry
3600 s / 7200 s
Expire
3600000 s
Negative TTL
3600 s

Serial per nameserver

NameserverSerial
ns-auth.rptu.de (131.246.9.117)2026102100
ns-auth.rptu.de (131.246.1.117)2026102100
ns-auth.rptu.de (2a03:63c0::53:1002)2026102100
ns-auth.rptu.de (2a03:63c0::53:1001)2026102100
ns-sec.hs-worms.de (193.30.18.2)2026102100
ns-sec.hs-worms.de (2001:4c80:81:1200::2)2026102100
ns.hs-worms.de (143.93.160.9)2026102100
ns.hs-worms.de (2001:4c80:81:a000::9)2026102100

Checks

  • ✓ Serial 2026102100 everywhere #22
    All nameservers serve the same version of the zone.
  • !
    Unusual SOA timers
    retry 2h should be shorter than refresh 1h. Current values: refresh 1h, retry 2h, expire 1000h, negative TTL 1h.
    #23
  • ✓ Primary is a public nameserver #24
    The primary nameserver ns.hs-worms.de is one of the listed nameservers.
  • ✓ Contact named-admin@hs-worms.de #25
    The SOA RNAME named-admin.hs-worms.de means named-admin@hs-worms.de.
  • ✓ Date-based serial #26
    The serial 2026102100 follows the YYYYMMDDnn convention (2026-10-21).

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

12 records at the apex

Found

Read from
131.246.9.117:53
TypeValueTTL
SOAns.HS-Worms.DE. named-admin.HS-Worms.DE. 2026102100 3600 7200 3600000 36003600
NSns-sec.HS-Worms.de.3600
NSns-auth.rptu.de.3600
NSns.HS-Worms.DE.3600
A46.20.47.1703600
MX20 MailGate-02.HS-Worms.DE.3600
MX30 MailGate-03.HS-Worms.DE.3600
MX10 MailGate-01.HS-Worms.DE.3600
TXT"adobe-idp-site-verification=1e066d08c45839ce7c3ff642158f24a4621cceff282a8e83d8a7b6c3b351e171"3600
TXT"MS=ms24117800"3600
TXT"google-site-verification=OV_wXQAooMMiV4AqNJi4pyXVgEgrXTVHBAD82xBYt4g"3600
TXT"v=spf1 mx a ip4:143.93.160.0/28 ip6:2001:4c80:81:a000::/64 include:uni-mainz.de ~all"3600

Checks

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