SurfaceMap › n › novacollege.nl

novacollege.nl

Checked 2026-10-22 14:51 UTC · first added 2026-10-21
!Check could not complete

Domain & DNS

error

22 passed 3 warn 0 failed 1 errors

lookups failed for rdap; results are incomplete

Areas

iRegistration !Delegation iNameservers ✓SOA !DNSSEC iRecords

Problems

  • !
    Glue differs from the zone
    Delegation · The addresses at the parent (glue) differ from the addresses in the zone: ns1.qsp.nl (glue 193.254.215.240, zone 193.254.215.240, 2a04:c580:0:f0::1); ns2.qsp.nl (glue 193.254.215.241, zone 193.254.215.241, 2a04:c580:0:f1::1). Update the glue at your registrar.
    #8
  • !
    Nameservers in one network
    Delegation · all IPv4 addresses are in 193.254.215.0/24; all IPv6 addresses are in 2a04:c580::/48. A single network failure takes all nameservers down; RFC 2182 recommends topologically separate networks (anycast setups are an exception).
    #10
  • !
    NSEC3 with extra iterations or salt
    DNSSEC · NSEC3 uses 33 iterations and a 8-byte salt. RFC 9276 recommends 0 iterations and no salt: extra iterations cost resolvers CPU and add no real protection, and some validators treat high counts as insecure.
    #31

Recent checks

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Full report

Domain & DNS report for novacollege.nl ›

Mail

warn

26 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
  • !
    1024-bit DKIM key
    DKIM · 1024-bit RSA keys are the minimum and are considered weak today: selector1 (1024 bits), s2 (1024 bits). Rotate to a 2048-bit key.
    #23
  • !
    Broad IP ranges
    SPF · These ranges authorize tens of thousands of addresses or more: ip4:40.92.0.0/15, ip4:52.100.0.0/15. Check that you really own and send from all of them.
    #27
  • !
    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 novacollege.nl ›