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Security

Harden browser CSP and email authentication DNS

Draft a Content-Security-Policy, align CORS headers where needed, then build SPF DKIM and DMARC TXT records before publishing DNS changes.

  1. CSP Policy Tools

    Build a CSP header and inspect an existing policy for unsafe-inline and wildcards.

    Reference guide and full documentation on the tool page →

  2. Web Server Config

    Generate CORS response headers that match the origins allowed by your app.

    Reference guide and full documentation on the tool page →

  3. Email Auth DNS Tools

    Build SPF DKIM and DMARC TXT values and analyze pasted records for weak policies.

    Reference guide and full documentation on the tool page →

  4. Unix Permissions Calculator

    Confirm file mode octal values for keys or configs you deploy alongside DNS changes.

    Reference guide and full documentation on the tool page →