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svb.nl

Checked 2026-10-21 21:25 UTC · first added 2026-10-21
!Check could not complete

Domain & DNS

error

27 passed 3 warn 0 failed 1 errors

lookups failed for rdap; results are incomplete

Areas

iRegistration !Delegation !Nameservers !SOA ✓DNSSEC ✓Records

Problems

  • !
    NS sets differ
    Delegation · The nameservers at the parent and in the zone should be the same. Only in the zone: a26-66.akam.net, a5-67.akam.net. a1-243.akam.net, a10-64.akam.net, a12-67.akam.net, a13-65.akam.net, a26-66.akam.net, a5-67.akam.net, ns1.f5clouddns.com, ns2.f5clouddns.com report NS a1-243.akam.net a10-64.akam.net a12-67.akam.net a13-65.akam.net a26-66.akam.net a5-67.akam.net ns1.f5clouddns.com ns2.f5clouddns.com.
    #7
  • !
    Software version disclosed
    Nameservers · These nameservers report their software version via version.bind/version.server, which helps attackers find known vulnerabilities: a1-243.akam.net: "41824.8"; a1-243.akam.net: "41824.9"; a10-64.akam.net: "48878.26"; a10-64.akam.net: "48878.29"; a12-67.akam.net: "48878.30"; a12-67.akam.net: "48878.32"; a13-65.akam.net: "41824.4"; a13-65.akam.net: "41824.7"; a26-66.akam.net: "48878.26"; a26-66.akam.net: "48878.30"; a5-67.akam.net: "41824.9"; a5-67.akam.net: "41824.8". Hide or replace the version string.
    #17
  • !
    Serials differ
    SOA · The nameservers serve different versions of the zone: 2012293513 on ns1.f5clouddns.com (107.162.234.197), ns1.f5clouddns.com (2604:e180:1071::3:1), ns2.f5clouddns.com (107.162.176.221), ns2.f5clouddns.com (2604:e180:1071::ffff:6ba2:b0dd); 2012293515 on a1-243.akam.net (193.108.91.243), a1-243.akam.net (2600:1401:2::f3), a10-64.akam.net (96.7.50.64), a10-64.akam.net (2600:1480:d000::40), a12-67.akam.net (184.26.160.67), a12-67.akam.net (2600:1480:f000::43), a13-65.akam.net (2.22.230.65), a13-65.akam.net (2600:1480:800::41), a26-66.akam.net (23.74.25.66), a26-66.akam.net (2600:1480:b800::42), a5-67.akam.net (95.100.168.67), a5-67.akam.net (2600:1480:b000::43). This is normal for a few minutes after a change; if it lasts, zone transfers to the secondaries are failing.
    #22

Recent checks

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Mail

warn

28 passed 4 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
  • !
    Signatures expire in 73h0m0s
    DNSSEC · DNSKEY signatures expire at 2026-10-24T22:47:44Z (in 73h0m0s). Check that re-signing works.
    #21
  • !
    1024-bit DKIM key
    DKIM · 1024-bit RSA keys are the minimum and are considered weak today: k1 (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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