schweizerbart.de

Checked 22 October 2026, 00:02 UTC · via 8.8.8.8
✗Problems found
18 passed 2 warnings 1 failed 8 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

ns1.manet.de, ns2.manet.de

Found

Parent zone
de
Delegation from
a.nic.de (194.0.0.53)
NS at the parent
ns1.manet.de, ns2.manet.de
NS in the zone
ns1.manet.de, ns2.manet.de
NameserverAddressesNetwork (AS)Glue
ns1.manet.de212.65.0.189 2a00:1e80:f:4::4AS21473 PFALZKOM - PFALZKOM GmbH, DE AS21473 PFALZKOM - PFALZKOM GmbH, DE212.65.0.189
ns2.manet.de212.65.31.241 2a00:1e80:f:5::5AS21473 PFALZKOM - PFALZKOM GmbH, DE AS21473 PFALZKOM - PFALZKOM GmbH, DE212.65.31.241

Checks

  • i
    2 nameservers
    Two nameservers meet the minimum; RFC 2182 recommends three or more for important zones: ns1.manet.de, ns2.manet.de.
    #6
  • ✓ Parent and zone agree #7
    The parent delegation and the zone's NS records list the same nameservers.
  • !
    Glue differs from the zone
    The addresses at the parent (glue) differ from the addresses in the zone: ns1.manet.de (glue 212.65.0.189, zone 212.65.0.189, 2a00:1e80:f:4::4); ns2.manet.de (glue 212.65.31.241, zone 212.65.31.241, 2a00:1e80:f:5::5). Update the glue at your registrar.
    #8
  • ✓ 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 2a00:1e80:f::/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 (AS21473 (PFALZKOM - PFALZKOM GmbH, DE): 4 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
  • ✓ All reachable over IPv6 #13
    Every nameserver has an IPv6 address.

Nameservers

fail

4 of 4 addresses answer authoritatively

Found

NameserverAnswerRecursionTCP / EDNSAXFRVersion
ns1.manet.de 212.65.0.189NOERROR, 5 ms, authoritativenoyes / yesrefusedversion view deactivated
ns1.manet.de 2a00:1e80:f:4::4NOERROR, 6 ms, authoritativenono / yesrefusedversion view deactivated
ns2.manet.de 212.65.31.241NOERROR, 5 ms, authoritativenoyes / yesrefusedcome and get some
ns2.manet.de 2a00:1e80:f:5::5NOERROR, 6 ms, authoritativenoyes / yesrefusedcome and get some

Checks

  • ✓ All respond #14
    All 4 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: ns1.manet.de: "version view deactivated"; ns2.manet.de: "come and get some".
    #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: ns1.manet.de (2a00:1e80:f:4::4): dial tcp [2a00:1e80:f:4::4]:53: i/o timeout.
    #19
  • ✓ EDNS supported #20
    All nameservers support EDNS(0).
  • ✓ Public addresses #21
    All nameserver addresses are publicly routable.

SOA

pass

serial 2025071701 · primary ns1.manet.de

Found

Primary (MNAME)
ns1.manet.de
Contact (RNAME)
technik.manet.de
Serial
2025071701
Refresh / retry
10800 s / 3600 s
Expire
604800 s
Negative TTL
86400 s

Serial per nameserver

NameserverSerial
ns1.manet.de (212.65.0.189)2025071701
ns1.manet.de (2a00:1e80:f:4::4)2025071701
ns2.manet.de (212.65.31.241)2025071701
ns2.manet.de (2a00:1e80:f:5::5)2025071701

Checks

  • ✓ Serial 2025071701 everywhere #22
    All nameservers serve the same version of the zone.
  • ✓ Timers within recommendations #23
    SOA refresh 3h, retry 1h, expire 7d, negative TTL 1d.
  • ✓ Primary is a public nameserver #24
    The primary nameserver ns1.manet.de is one of the listed nameservers.
  • ✓ Contact technik@manet.de #25
    The SOA RNAME technik.manet.de means technik@manet.de.
  • ✓ Date-based serial #26
    The serial 2025071701 follows the YYYYMMDDnn convention (2025-07-17).

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

7 records at the apex

Found

Read from
212.65.0.189:53
TypeValueTTL
SOAns1.manet.de. technik.manet.de. 2025071701 10800 3600 604800 8640086400
NSns2.manet.de.86400
NSns1.manet.de.86400
A212.65.0.16386400
MX20 mxtls.expurgate.net.86400
TXT"google-site-verification=DgdwkNlTcaBG-pGK7lf1OySFysXMYHWdboXY6L8dgfY"86400
TXT"v=spf1 a ip4:85.235.65.111 ip4:213.109.163.154 -all"86400

Checks

  • ✓ TTLs within range #32
    TTLs: A 1d, MX 1d, 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