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on.com

Checked 2026-10-22 10:05 UTC · first added 2026-10-21
✗Problems found Score 78 of 100

Domain & DNS

warn

26 passed 2 warn 0 failed

Areas

iRegistration iDelegation !Nameservers ✓SOA !DNSSEC iRecords

Problems

  • !
    Software version disclosed
    Nameservers · These nameservers report their software version via version.bind/version.server, which helps attackers find known vulnerabilities: chin.ns.cloudflare.com: "2026.10.2"; jay.ns.cloudflare.com: "2026.10.2". Hide or replace the version string.
    #17
  • !
    Signed but not delegated securely
    DNSSEC · 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

Recent checks

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Domain & DNS report for on.com ›

Mail

fail

28 passed 2 warn 1 failed

Areas

✓SPF ✗DMARC !DKIM !DNSSEC ✓MX iTLS iBIMI

Problems

  • ✗
    Policy: none (monitoring only)
    DMARC · DMARC policy is set to 'none', which only monitors but doesn't protect against spoofing. Consider upgrading to 'quarantine' or ideally 'reject'.
    #4
  • !
    Signed, but no DS at parent
    DNSSEC · The zone is signed (DNSKEY present) but the parent has no DS record, so the chain of trust is incomplete. Publish the DS record at your registrar.
    #8
  • !
    1024-bit DKIM key
    DKIM · 1024-bit RSA keys are the minimum and are considered weak today: mail (1024 bits). Rotate to a 2048-bit key.
    #23

Recent checks

✗

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