zelfhulp.be

Checked 22 October 2026, 07:30 UTC · via 8.8.8.8
✗Problems found
18 passed 3 warnings 1 failed 7 info

Registration

info

.be country-code

Found

TLD
.be (country-code)
ICANN policies apply
no

Checks

  • i
    .be 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
    .be is delegated in the root zone and DNSSEC-signed.
  • i
    Registration data not available
    No registration data via RDAP: the registry of .be offers no RDAP service. Many ccTLD registries don't offer RDAP; check the registry's WHOIS instead.
    #3

Delegation

warn

dns1.kulnet.kuleuven.ac.be, dns2.kulnet.kuleuven.ac.be

Found

Parent zone
be
Delegation from
a.nsset.be (194.0.6.1)
NS at the parent
dns1.kulnet.kuleuven.ac.be, dns2.kulnet.kuleuven.ac.be
NS in the zone
dns1.kulnet.kuleuven.be, dns2.kulnet.kuleuven.be
NameserverAddressesNetwork (AS)Glue
dns1.kulnet.kuleuven.ac.be (parent only)134.58.126.5AS2611 BELNET - BELNET, BE-
dns1.kulnet.kuleuven.be (zone only)134.58.126.5 2a02:2c40:0:40::53:5AS2611 BELNET - BELNET, BE AS2611 BELNET - BELNET, BE-
dns2.kulnet.kuleuven.ac.be (parent only)134.58.126.6AS2611 BELNET - BELNET, BE-
dns2.kulnet.kuleuven.be (zone only)134.58.126.6 2a02:2c40:0:40::53:6AS2611 BELNET - BELNET, BE AS2611 BELNET - BELNET, BE-

Checks

  • i
    2 nameservers
    Two nameservers meet the minimum; RFC 2182 recommends three or more for important zones: dns1.kulnet.kuleuven.ac.be, dns2.kulnet.kuleuven.ac.be.
    #6
  • !
    NS sets differ
    The nameservers at the parent and in the zone should be the same. Only at the parent: dns1.kulnet.kuleuven.ac.be, dns2.kulnet.kuleuven.ac.be; only in the zone: dns1.kulnet.kuleuven.be, dns2.kulnet.kuleuven.be. dns1.kulnet.kuleuven.ac.be, dns1.kulnet.kuleuven.be, dns2.kulnet.kuleuven.ac.be, dns2.kulnet.kuleuven.be report NS dns1.kulnet.kuleuven.be dns2.kulnet.kuleuven.be.
    #7
  • ✓ 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 134.58.126.0/24; all IPv6 addresses are in 2a02:2c40::/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 (AS2611 (BELNET - BELNET, BE): 6 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 .be
    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
  • i
    Partly IPv6
    These nameservers have no IPv6 address: dns1.kulnet.kuleuven.ac.be, dns2.kulnet.kuleuven.ac.be.
    #13

Nameservers

fail

5 of 6 addresses answer authoritatively

Found

NameserverAnswerRecursionTCP / EDNSAXFRVersion
dns1.kulnet.kuleuven.ac.be 134.58.126.5NOERROR, 19 ms, authoritativenoyes / yesrefused-
dns1.kulnet.kuleuven.be 134.58.126.5NOERROR, 19 ms, authoritativenoyes / yesrefused-
dns1.kulnet.kuleuven.be 2a02:2c40:0:40::53:5NOERROR, 19 ms, authoritativenoyes / yesrefused-
dns2.kulnet.kuleuven.ac.be 134.58.126.6NOERROR, 18 ms, authoritativenoyes / yesrefused-
dns2.kulnet.kuleuven.be 134.58.126.6no responsenono / no--
dns2.kulnet.kuleuven.be 2a02:2c40:0:40::53:6NOERROR, 19 ms, authoritativenoyes / yesrefused-

Checks

  • ✗
    Nameservers not responding
    These addresses did not answer, so resolvers waste time on timeouts: dns2.kulnet.kuleuven.be (134.58.126.6): read udp 46.225.38.91:37002->134.58.126.6:53: i/o timeout.
    #14
  • ✓ All authoritative #15
    Every responding nameserver answers authoritatively for the zone.
  • ✓ No recursion #16
    The nameservers do not answer recursive queries for other domains.
  • ✓ No version disclosed #17
    The nameservers don't reveal their software version.
  • ✓ 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 2024031604 · primary dns1.kulnet.kuleuven.be

Found

Primary (MNAME)
dns1.kulnet.kuleuven.be
Contact (RNAME)
postmaster.kuleuven.be
Serial
2024031604
Refresh / retry
10800 s / 1800 s
Expire
3600000 s
Negative TTL
86400 s

Serial per nameserver

NameserverSerial
dns1.kulnet.kuleuven.ac.be (134.58.126.5)2024031604
dns1.kulnet.kuleuven.be (134.58.126.5)2024031604
dns1.kulnet.kuleuven.be (2a02:2c40:0:40::53:5)2024031604
dns2.kulnet.kuleuven.ac.be (134.58.126.6)2024031604
dns2.kulnet.kuleuven.be (2a02:2c40:0:40::53:6)2024031604

Checks

  • ✓ Serial 2024031604 everywhere #22
    All nameservers serve the same version of the zone.
  • ✓ Timers within recommendations #23
    SOA refresh 3h, retry 30m, expire 1000h, negative TTL 1d.
  • ✓ Primary is a public nameserver #24
    The primary nameserver dns1.kulnet.kuleuven.be is one of the listed nameservers.
  • ✓ Contact postmaster@kuleuven.be #25
    The SOA RNAME postmaster.kuleuven.be means postmaster@kuleuven.be.
  • ✓ Date-based serial #26
    The serial 2024031604 follows the YYYYMMDDnn convention (2024-03-16).

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

5 records at the apex

Found

Read from
134.58.126.5:53
TypeValueTTL
SOAdns1.kulnet.kuleuven.be. postmaster.kuleuven.be. 2024031604 10800 1800 3600000 8640086400
NSdns1.kulnet.kuleuven.be.86400
NSdns2.kulnet.kuleuven.be.86400
A134.58.65.19986400
AAAA2a02:2c40:0:80::80:9a86400

Checks

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