Security Best Practices

Hardening Node.js: Security Defense-in-Depth

Node.js applications operate exposed on the internet, enduring relentless automated reconnaissance. Security must be an architectural prerequisite.

The OWASP Perimeter

• SQL/NoSQL Injection: Never concatenate user input into database commands. Utilize parameterized queries natively provided by drivers or strict ORMs to neuter malicious strings.
• Cross-Site Scripting (XSS): Ensure any data rendered by the server is sanitized, and enforce strict Content Security Policies (CSP) via HTTP headers.
• DDoS & Brute Force Mitigation: Implement strict Rate Limiting via Redis. Use exponential delays on failed login endpoints.

HTTP Header Hardening

Implement libraries like helmet.js to aggressively strip identifying headers (X-Powered-By) and enforce secure behaviors such as Strict-Transport-Security (HSTS) and X-Content-Type-Options: nosniff.