What does the SiteGuardian security scanner check?

The scanner checks SSL/TLS certificates, 6 security headers (HSTS, CSP, X-Frame-Options, X-Content-Type-Options, Referrer-Policy, Permissions-Policy), DNSSEC, email authentication (SPF, DKIM, DMARC), SMTP encryption, MTA-STS, DANE/TLSA, CAA records, and DNS exposure. Results are scored 0-100 with an A-F grade.

Is the security scanner free?

Yes, completely free. No account, no signup, no credit card needed. Enter any domain and get instant results.

How is the security score calculated?

The score is out of 100 points: Security Headers (25 pts), SSL/TLS (20 pts), Email Authentication (15 pts), DNS Security (15 pts), HTTPS Enforcement (10 pts), security.txt (5 pts), MTA-STS + TLS-RPT (5 pts), and Server Hardening (5 pts). Grade A = 90-100, B = 75-89, C = 60-74, D = 40-59, F = 0-39.

Which compliance frameworks does the scan map to?

Scan findings are mapped to GDPR, NIS2, CRA (Cyber Resilience Act), ISO 27001, SOC 2, PCI DSS, and other EU regulatory frameworks. Each finding shows which regulations it affects.

Where is the scan data processed?

All scans run from EU-hosted infrastructure in Germany. No data is transferred outside the EU. Scan results are cached temporarily and not stored permanently unless you create an account.

Gratis — geen account nodig

Hoe veilig is uw website?

Geben Sie eine Domain ein. Erhalten Sie Ihre Sicherheitsnote, Punktzahl und eine detaillierte Analyse — in Sekunden.

Wir prüfen SSL-Zertifikate, Sicherheitsheader, DNSSEC, E-Mail-Authentifizierung, SMTP-Verschlüsselung und mehr.

Wat we controleren

Jede Website wird wöchentlich in diesen Sicherheitsdimensionen gescannt. Die Bewertung erfolgt auf einer 100-Punkte-Skala.

Security Headers

25 ptn

HSTS, CSP, X-Frame-Options, X-Content-Type, Referrer-Policy, Permissions-Policy

SSL/TLS-certificaat

20 ptn

Key strength, signature algorithm, chain depth, TLS version, HTTPS redirect

E-mailauthenticatie

15 ptn

SPF, DKIM key strength, DMARC policy enforcement, MTA-STS, TLS-RPT, SMTP encryption

DNS-beveiliging

15 ptn

DNSSEC validation, CAA records, DANE/TLSA, DoH consistency

security.txt

5 ptn

Vulnerability disclosure contact per RFC 9116

Serverprivacy

5 ptn

No version disclosure, no X-Powered-By, restricted CORS headers

Enter a domain

Type any URL — we handle the rest. No login, no signup, no credit card.

We scan everything

SSL, headers, DNS, email auth, SMTP encryption — checked in seconds from our EU servers.

See your grade

A-to-F grade, 0-100 score, and detailed recommendations for every finding.

Eén scan toont het probleem. Continue monitoring voorkomt het.

Starten Sie kostenlos. Ein Monitor, SSL- & Domain-Warnungen, Telegram-Bot — keine Kreditkarte erforderlich.

Gratis monitoring starten

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