API endpoints, especially public endpoints like RFQ forms or subscription APIs, are vulnerable to botnets attempting denial-of-service (DDoS) floods. Securing your backend requires a defense-in-depth model combining network layers and software limiters.
1. Express Rate Limiting
Never leave your public routes unprotected. Use the express-rate-limit middleware in Node.js to cap the number of requests a single IP address can make within a specified timeframe (e.g., maximum 10 requests per minute on contact routes).
// Implementing rate limiter middleware in Express
const rateLimit = require('express-rate-limit');
const rfqLimiter = rateLimit({
windowMs: 60 * 1000, // 1 minute
max: 10,
message: { message: 'Too many requests. Please try again later.' }
});
app.use('/api/rfq', rfqLimiter);
2. Injecting Secure Response Headers
Helmet middleware helps secure headers, disabling X-Powered-By and configures CSP.
3. AWS CloudFront WAF Integration
Deploy cloud applications secure against SQL-injection or Cross-Site Scripting (XSS) attacks.