modelbouwforum.nl

Checked 22 October 2026, 14:32 UTC · via 8.8.8.8
!Passed with warnings
19 passed 3 warnings 0 failed 7 info

Registration

info

.nl country-code

Found

TLD
.nl (country-code)
ICANN policies apply
no
Lookup error: https://rdap.sidn.nl/domain/modelbouwforum.nl returned HTTP 429

Checks

  • i
    .nl 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
    .nl is delegated in the root zone and DNSSEC-signed.
  • i
    Could not be checked
    The RDAP lookup failed, so this could not be checked: https://rdap.sidn.nl/domain/modelbouwforum.nl returned HTTP 429
    #3

Delegation

info

ns1.modelbouw-server.nl, ns2.modelbouw-server.nl

Found

Parent zone
nl
Delegation from
ns1.dns.nl (194.0.28.53)
NS at the parent
ns1.modelbouw-server.nl, ns2.modelbouw-server.nl
NS in the zone
ns1.modelbouw-server.nl, ns2.modelbouw-server.nl
NameserverAddressesNetwork (AS)Glue
ns1.modelbouw-server.nl83.172.188.91 2a02:cec0:10:16a::1AS25459 NEDZONE-AS - Eurofiber Cloud Infra B.V., NL AS25459 NEDZONE-AS - Eurofiber Cloud Infra B.V., NL83.172.188.91 2a02:cec0:10:16a::1
ns2.modelbouw-server.nl83.172.189.91 2a02:cec0:10:16a::2AS25459 NEDZONE-AS - Eurofiber Cloud Infra B.V., NL AS25459 NEDZONE-AS - Eurofiber Cloud Infra B.V., NL83.172.189.91 2a02:cec0:10:16a::2

Checks

  • i
    2 nameservers
    Two nameservers meet the minimum; RFC 2182 recommends three or more for important zones: ns1.modelbouw-server.nl, ns2.modelbouw-server.nl.
    #6
  • ✓ 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 2a02:cec0:10::/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 (AS25459 (NEDZONE-AS - Eurofiber Cloud Infra B.V., NL): 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 .nl
    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

warn

4 of 4 addresses answer authoritatively

Found

NameserverAnswerRecursionTCP / EDNSAXFRVersion
ns1.modelbouw-server.nl 83.172.188.91NOERROR, 12 ms, authoritativenoyes / yesrefused9.11.36-RedHat-9.11.36-16.el8_10.4
ns1.modelbouw-server.nl 2a02:cec0:10:16a::1NOERROR, 12 ms, authoritativenoyes / yesrefused9.11.36-RedHat-9.11.36-16.el8_10.4
ns2.modelbouw-server.nl 83.172.189.91NOERROR, 12 ms, authoritativenoyes / yesrefused9.11.36-RedHat-9.11.36-16.el8_10.4
ns2.modelbouw-server.nl 2a02:cec0:10:16a::2NOERROR, 13 ms, authoritativenoyes / yesrefused9.11.36-RedHat-9.11.36-16.el8_10.4

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.
  • !
    Software version disclosed
    These nameservers report their software version via version.bind/version.server, which helps attackers find known vulnerabilities: ns1.modelbouw-server.nl: "9.11.36-RedHat-9.11.36-16.el8_10.4"; ns2.modelbouw-server.nl: "9.11.36-RedHat-9.11.36-16.el8_10.4". 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

warn

serial 2025083100 · primary ns1.modelbouw-server.nl

Found

Primary (MNAME)
ns1.modelbouw-server.nl
Contact (RNAME)
root.modelbouwforum.nl
Serial
2025083100
Refresh / retry
300 s / 3600 s
Expire
1209600 s
Negative TTL
86400 s

Serial per nameserver

NameserverSerial
ns1.modelbouw-server.nl (83.172.188.91)2025083100
ns1.modelbouw-server.nl (2a02:cec0:10:16a::1)2025083100
ns2.modelbouw-server.nl (83.172.189.91)2025083100
ns2.modelbouw-server.nl (2a02:cec0:10:16a::2)2025083100

Checks

  • ✓ Serial 2025083100 everywhere #22
    All nameservers serve the same version of the zone.
  • !
    Unusual SOA timers
    refresh 5m is outside 20m–1d; retry 1h should be shorter than refresh 5m. Current values: refresh 5m, retry 1h, expire 14d, negative TTL 1d.
    #23
  • ✓ Primary is a public nameserver #24
    The primary nameserver ns1.modelbouw-server.nl is one of the listed nameservers.
  • ✓ Contact root@modelbouwforum.nl #25
    The SOA RNAME root.modelbouwforum.nl means root@modelbouwforum.nl.
  • ✓ Date-based serial #26
    The serial 2025083100 follows the YYYYMMDDnn convention (2025-08-31).

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
83.172.188.91:53
TypeValueTTL
SOAns1.modelbouw-server.nl. root.modelbouwforum.nl. 2025083100 300 3600 1209600 86400300
NSns2.modelbouw-server.nl.300
NSns1.modelbouw-server.nl.300
A83.172.189.91300
AAAA2a02:cec0:10:16a::2300
MX10 mail.modelbouwforum.nl.300
TXT"v=spf1 mx a ip4:83.172.188.91 ip6:2a02:cec0:10:16a::1 a:mail.modelbouwforum.nl a:ns1.modelbouw-server.nl ~all"300

Checks

  • ✓ TTLs within range #32
    TTLs: A 5m, AAAA 5m, MX 5m, NS 5m. The NS TTL at the parent is 1h 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