groningermuseum.nl

Checked 21 October 2026, 21:21 UTC · via 8.8.8.8
!Passed with warnings
20 passed 3 warnings 0 failed 6 info

Registration

info

.nl country-code

Found

TLD
.nl (country-code)
ICANN policies apply
no
Lookup error: https://rdap.sidn.nl/domain/groningermuseum.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/groningermuseum.nl returned HTTP 429
    #3

Delegation

warn

ns1.masterdns.nl, ns2.masterdns.nl

Found

Parent zone
nl
Delegation from
ns1.dns.nl (194.0.28.53)
NS at the parent
ns1.masterdns.nl, ns2.masterdns.nl
NS in the zone
ns1.masterdns.nl, ns2.masterdns.nl
NameserverAddressesNetwork (AS)Glue
ns1.masterdns.nl185.168.85.11 2a0a:9fc0:1053::11AS31673 UNISERVER-AS - Uniserver Internet B.V., NL AS31673 UNISERVER-AS - Uniserver Internet B.V., NL185.168.85.11 2a0a:9fc0:1053::11
ns2.masterdns.nl185.168.85.12 2a0a:9fc0:1053::12AS31673 UNISERVER-AS - Uniserver Internet B.V., NL AS31673 UNISERVER-AS - Uniserver Internet B.V., NL185.168.85.12 2a0a:9fc0:1053::12

Checks

  • i
    2 nameservers
    Two nameservers meet the minimum; RFC 2182 recommends three or more for important zones: ns1.masterdns.nl, ns2.masterdns.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.
  • !
    Nameservers in one network
    all IPv4 addresses are in 185.168.85.0/24; all IPv6 addresses are in 2a0a:9fc0:1053::/48. A single network failure takes all nameservers down; RFC 2182 recommends topologically separate networks (anycast setups are an exception).
    #10
  • i
    All nameservers in one AS
    All nameserver addresses are announced by one network operator (AS31673 (UNISERVER-AS - Uniserver Internet 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.masterdns.nl 185.168.85.11NOERROR, 10 ms, authoritativenoyes / yesrefusedPowerDNS Authoritative Server 4.3.2 (built Mar 8 2021 10:28:08 by root@5b0daa176133)
ns1.masterdns.nl 2a0a:9fc0:1053::11NOERROR, 11 ms, authoritativenoyes / yesrefusedPowerDNS Authoritative Server 4.3.2 (built Mar 8 2021 10:28:08 by root@5b0daa176133)
ns2.masterdns.nl 185.168.85.12NOERROR, 10 ms, authoritativenoyes / yesrefusedPowerDNS Authoritative Server 4.3.2 (built Mar 8 2021 10:28:08 by root@5b0daa176133)
ns2.masterdns.nl 2a0a:9fc0:1053::12NOERROR, 14 ms, authoritativenoyes / yesrefusedPowerDNS Authoritative Server 4.3.2 (built Mar 8 2021 10:28:08 by root@5b0daa176133)

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.masterdns.nl: "PowerDNS Authoritative Server 4.3.2 (built Mar 8 2021 10:28:08 by root@5b0daa176133)"; ns2.masterdns.nl: "PowerDNS Authoritative Server 4.3.2 (built Mar 8 2021 10:28:08 by root@5b0daa176133)". 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 2022091401 · primary ns1.masterdns.nl

Found

Primary (MNAME)
ns1.masterdns.nl
Contact (RNAME)
hostmaster.denit.net
Serial
2022091401
Refresh / retry
14400 s / 300 s
Expire
604800 s
Negative TTL
86400 s

Serial per nameserver

NameserverSerial
ns1.masterdns.nl (185.168.85.11)2022091401
ns1.masterdns.nl (2a0a:9fc0:1053::11)2022091401
ns2.masterdns.nl (185.168.85.12)2022091401
ns2.masterdns.nl (2a0a:9fc0:1053::12)2022091401

Checks

  • ✓ Serial 2022091401 everywhere #22
    All nameservers serve the same version of the zone.
  • ✓ Timers within recommendations #23
    SOA refresh 4h, retry 5m, expire 7d, negative TTL 1d.
  • ✓ Primary is a public nameserver #24
    The primary nameserver ns1.masterdns.nl is one of the listed nameservers.
  • ✓ Contact hostmaster@denit.net #25
    The SOA RNAME hostmaster.denit.net means hostmaster@denit.net.
  • ✓ Date-based serial #26
    The serial 2022091401 follows the YYYYMMDDnn convention (2022-09-14).

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

6 records at the apex

Found

Read from
185.168.85.11:53
TypeValueTTL
SOAns1.masterdns.nl. hostmaster.denit.net. 2022091401 14400 300 604800 8640010800
NSns1.masterdns.nl.10800
NSns2.masterdns.nl.10800
A20.105.224.34300
MX0 groningermuseum-nl.mail.protection.outlook.com.300
TXT"v=spf1 a mx ip4:89.188.29.99 ip4:94.126.71.22 ip4:94.247.2.103 ip4:213.227.145.144 ip4:81.93.56.142 ip4:83.137.148.130 ip4:45.10.229.27 ip4:213.126.33.98 ip4:213.124.40.194 include:mailplus.nl include:spf.afas.online include:spf.postal.cloudmailer.nl incl" "ude:spf.protection.outlook.com include:shops.shopify.com include:spf.eu.exclaimer.net include:spf.graffitinetwerk.nl -all"3600

Checks

  • ✓ TTLs within range #32
    TTLs: A 5m, MX 5m, NS 3h. The NS TTL at the parent is 1h and in the zone 3h; 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