HTTP headers
Analyses the HTTP response for the most important security headers: HSTS, Content-Security-Policy, X-Frame-Options, X-Content-Type-Options, Referrer-Policy and Permissions-Policy.
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SSL check
TLS certificate, validity, cipher.
DMARC lookup
SPF, DMARC, DKIM and MX records.
DNS lookup
A, AAAA, MX, NS, TXT, CAA, SOA.
Whois / RDAP
Registrar, expiry, status, name servers.
Port scan
20 common TCP ports, critical ones flagged.
Cookie audit
Set-Cookie headers, flags, tracker detection.