rtvnof.nl

Checked 22 October 2026, 15:50 UTC · via 8.8.8.8
✗Problems found
21 passed 4 warnings 1 failed 6 info

Registration

info

.nl country-code

Found

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

Delegation

warn

ns1.rtvnof.nl, ns2.rtvnof.nl

Found

Parent zone
nl
Delegation from
ns1.dns.nl (194.0.28.53)
NS at the parent
ns1.rtvnof.nl, ns2.rtvnof.nl
NS in the zone
ns1.rtvnof.nl, ns2.rtvnof.nl
NameserverAddressesNetwork (AS)Glue
ns1.rtvnof.nl178.19.119.252 2001:67c:b0:0:178:19:119:252AS50673 Serverius-as - Serverius Holding B.V., NL AS50673 Serverius-as - Serverius Holding B.V., NL178.19.119.252
ns2.rtvnof.nl161.97.72.154 2a02:c207:2131:3376::1AS51167 CONTABO - Contabo GmbH, DE AS51167 CONTABO - Contabo GmbH, DE161.97.72.154

Checks

  • i
    2 nameservers
    Two nameservers meet the minimum; RFC 2182 recommends three or more for important zones: ns1.rtvnof.nl, ns2.rtvnof.nl.
    #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.rtvnof.nl (glue 178.19.119.252, zone 178.19.119.252, 2001:67c:b0:0:178:19:119:252); ns2.rtvnof.nl (glue 161.97.72.154, zone 161.97.72.154, 2a02:c207:2131:3376::1). Update the glue at your registrar.
    #8
  • ✓ 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 2 IPv4 /24s and 2 IPv6 /48s.
  • ✓ 2 autonomous systems #11
    The nameservers are spread over: AS50673 (Serverius-as - Serverius Holding B.V., NL): 2 addresses; AS51167 (CONTABO - Contabo GmbH, DE): 2 addresses.
  • 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

fail

4 of 4 addresses answer authoritatively

Found

NameserverAnswerRecursionTCP / EDNSAXFRVersion
ns1.rtvnof.nl 178.19.119.252NOERROR, 12 ms, authoritativenoyes / yesALLOWED (162 records)9.18.30-0ubuntu0.20.04.2-Ubuntu
ns1.rtvnof.nl 2001:67c:b0:0:178:19:119:252NOERROR, 12 ms, authoritativenoyes / yesALLOWED (162 records)9.18.30-0ubuntu0.20.04.2-Ubuntu
ns2.rtvnof.nl 161.97.72.154NOERROR, 9 ms, authoritativenoyes / yesrefused9.16.48-Ubuntu
ns2.rtvnof.nl 2a02:c207:2131:3376::1NOERROR, 9 ms, authoritativenoyes / yesrefused9.16.48-Ubuntu

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.rtvnof.nl: "9.18.30-0ubuntu0.20.04.2-Ubuntu"; ns2.rtvnof.nl: "9.16.48-Ubuntu". Hide or replace the version string.
    #17
  • ✗
    Zone transfer allowed
    These nameservers send the complete zone to anyone who asks (AXFR), exposing all host names: ns1.rtvnof.nl (178.19.119.252): 162 records; ns1.rtvnof.nl (2001:67c:b0:0:178:19:119:252): 162 records. Restrict zone transfers to your secondary servers.
    #18
  • ✓ 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 2026041306 · primary ns1.rtvnof.nl

Found

Primary (MNAME)
ns1.rtvnof.nl
Contact (RNAME)
hostmaster.rtvnof.nl
Serial
2026041306
Refresh / retry
3600 s / 3600 s
Expire
1209600 s
Negative TTL
1800 s

Serial per nameserver

NameserverSerial
ns1.rtvnof.nl (178.19.119.252)2026041306
ns1.rtvnof.nl (2001:67c:b0:0:178:19:119:252)2026041306
ns2.rtvnof.nl (161.97.72.154)2026041306
ns2.rtvnof.nl (2a02:c207:2131:3376::1)2026041306

Checks

  • ✓ Serial 2026041306 everywhere #22
    All nameservers serve the same version of the zone.
  • !
    Unusual SOA timers
    retry 1h should be shorter than refresh 1h. Current values: refresh 1h, retry 1h, expire 14d, negative TTL 30m.
    #23
  • ✓ Primary is a public nameserver #24
    The primary nameserver ns1.rtvnof.nl is one of the listed nameservers.
  • ✓ Contact hostmaster@rtvnof.nl #25
    The SOA RNAME hostmaster.rtvnof.nl means hostmaster@rtvnof.nl.
  • ✓ Date-based serial #26
    The serial 2026041306 follows the YYYYMMDDnn convention (2026-04-13).

DNSSEC

warn

Signed, but no DS at parent

Found

Validated by resolver
no
Denial of existence
NSEC
Signatures valid until
5 November 2026

DNSKEY in the zone

Key tagRoleAlgorithm
6310KSK (257)RSASHA256 (8)
40980ZSK (256)RSASHA256 (8)

Checks

  • !
    Signed but not delegated securely
    The zone is signed but the parent has no DS record, so the signatures are not used. Publish the DS record at your registrar.
    #27
  • ✓ Modern algorithms #29
    Key algorithms: RSASHA256 (8).
  • ✓ Signatures valid until 2026-11-05 #30
    The earliest DNSKEY/SOA signature expires at 2026-11-05 01:20 UTC.
  • i
    NSEC
    The zone uses NSEC, so its full contents can be listed by walking the NSEC chain. That is fine unless the names are sensitive.
    #31

Records

info

15 records at the apex

Found

Read from
178.19.119.252:53
TypeValueTTL
SOAns1.rtvnof.nl. hostmaster.rtvnof.nl. 2026041306 3600 3600 1209600 18003600
NSns1.rtvnof.nl.300
NSns2.rtvnof.nl.300
A178.19.119.200300
AAAA2001:67c:b0:0:178:19:119:200300
MX10 ALT4.ASPMX.L.GOOGLE.COM.300
MX10 ALT3.ASPMX.L.GOOGLE.COM.300
MX5 ALT2.ASPMX.L.GOOGLE.COM.300
MX5 ALT1.ASPMX.L.GOOGLE.COM.300
MX1 ASPMX.L.GOOGLE.COM.300
TXT"229b06f638496c1755156e1a7fa93ae2bf121757"300
TXT"v=spf1 a mx ip4:178.19.119.200 ip6:2001:67c:b0:0:178:19:119:200 include:_spf.google.com ~all"300
TXT"2019-11-11-transfer-to-j.j.draijer@ic-hosting.nl"300
TXT"google-site-verification=HLipe3-xP1Byaxzle9hW0hU5yqvPVNQ-BUGtyTbSyuI"300
TXT"google-site-verification=OFe5vvGhc9lO0PwO8Ih-sjLzoRU6EvTbAirtPV5UJh4"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