mvonederland.nl

Nameservers · These nameservers report their software version via version.bind/version.server, which helps attackers find known vulnerabilities: ns1.qweb.nl: "PowerDNS Authoritative Server 5.1.5 (built Oct 7 2026 06:13:16 by root@localhost)"; ns2.qweb.nl: "PowerDNS Authoritative Server 5.1.5 (built Oct 7 2026 06:13:16 by root@localhost)"; ns3.qweb.co: "PowerDNS Authoritative Server 5.1.5 (built Oct 7 2026 06:13:16 by root@localhost)". Hide or replace the version string.

SOA · retry 1h should be shorter than refresh 1h. Current values: refresh 1h, retry 1h, expire 7d, negative TTL 4h.

Records · These records have a TTL below 5m, causing extra queries and slower lookups: A (1m40s), AAAA (1m40s). Low TTLs are useful just before a planned change.

DMARC · DMARC policy is set to 'quarantine'. Consider upgrading to 'reject' for stronger protection once you've verified legitimate emails are passing authentication.

MX · Only one MX record found. For better email reliability, consider adding at least one backup MX server.

DKIM · 1024-bit RSA keys are the minimum and are considered weak today: mail (1024 bits), k1 (1024 bits), s2 (1024 bits). Rotate to a 2048-bit key.

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.