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jaarbeurs.nl

Checked 2026-10-21 21:22 UTC · first added 2026-10-21
!Check could not complete

Domain & DNS

error

27 passed 2 warn 0 failed 1 errors

lookups failed for rdap; results are incomplete

Areas

iRegistration ✓Delegation !Nameservers ✓SOA iDNSSEC !Records

Problems

  • !
    Software version disclosed
    Nameservers · These nameservers report their software version via version.bind/version.server, which helps attackers find known vulnerabilities: ns1.greenhost.nl: "Knot DNS 3.6.0"; ns2.greenhost.net: "Knot DNS 3.6.0"; ns3.greenhost.nl: "Knot DNS 3.5.6". Hide or replace the version string.
    #17
  • !
    Very low TTLs
    Records · These records have a TTL below 5m, causing extra queries and slower lookups: A (1m). Low TTLs are useful just before a planned change.
    #32

Recent checks

!

Full report

Domain & DNS report for jaarbeurs.nl ›

Mail

warn

27 passed 3 warn 0 failed

Areas

✓SPF ✓DMARC !DKIM ✓DNSSEC !MX !TLS iBIMI

Problems

  • !
    Hosts without IPv6
    MX · The following MX hosts could not be resolved to IPv6 addresses: d327303.a.ess.de.barracudanetworks.com, d327303.b.ess.de.barracudanetworks.com
    #11
  • !
    1024-bit DKIM key
    DKIM · 1024-bit RSA keys are the minimum and are considered weak today: selector1 (1024 bits). Rotate to a 2048-bit key.
    #23
  • !
    Not configured
    TLS · MTA-STS is not configured, so other mail servers fall back to unencrypted delivery when TLS fails or is stripped by an attacker. Publish a _mta-sts TXT record and a policy at https://mta-sts.<domain>/.well-known/mta-sts.txt.
    #32

Recent checks

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Full report

Mail report for jaarbeurs.nl ›