SurfaceMap › h › hku.nl

hku.nl

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

Domain & DNS

error

25 passed 2 warn 0 failed 1 errors

lookups failed for rdap; results are incomplete

Areas

iRegistration !Delegation !Nameservers ✓SOA iDNSSEC ✓Records

Problems

  • !
    NS sets differ
    Delegation · The nameservers at the parent and in the zone should be the same. Only in the zone: luke.hku.nl. leia.hku.nl, luke.hku.nl, ns1.surfnet.nl, quipu.hku.nl, yoda.hku.nl report NS leia.hku.nl luke.hku.nl ns1.surfnet.nl quipu.hku.nl yoda.hku.nl.
    #7
  • !
    Software version disclosed
    Nameservers · These nameservers report their software version via version.bind/version.server, which helps attackers find known vulnerabilities: leia.hku.nl: "9.20.29"; luke.hku.nl: "9.20.29"; quipu.hku.nl: "9.20.29"; yoda.hku.nl: "9.20.29". Hide or replace the version string.
    #17

Recent checks

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Full report

Domain & DNS report for hku.nl ›

Mail

warn

27 passed 3 warn 0 failed

Areas

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

Problems

  • !
    Single MX host, no backup
    MX · Only one MX record found. For better email reliability, consider adding at least one backup MX server.
    #12
  • !
    1024-bit DKIM key
    DKIM · 1024-bit RSA keys are the minimum and are considered weak today: selector1 (1024 bits), selector2 (1024 bits), s2 (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 hku.nl ›