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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.

    Open Tool With Sample
  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.Open Next Tool With Output
  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.Open Next Tool With Output
  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.Open Next Tool With Output