In this tutorial, we will implement rate limiting in order to prevent the same IP from making too many requests to our API and that will then help us prevent attacks, like denial of services or brute force attacks.

So, here we will implement a rate limiter as global middleware, so basically, the rate limiter will count the number of

requests coming from one IP and then, when there are too many requests, block these requests.

npm install express-rate-limit
const rateLimit = require('express-rate-limit')
// Middleware

const limiter = rateLimit({
  windowMs: 15 * 60 * 1000, // 15 minutes
  max: 100, // Limit each IP to 100 requests per `window` (here, per 15 minutes)
  standardHeaders: true, // Return rate limit info in the `RateLimit-*` headers
  legacyHeaders: false, // Disable the `X-RateLimit-*` headers
  message: "Too many requests from this IP, please try again after in an hour",
});

// Apply the rate limiting middleware to all requests
app.use("/api", limiter);
Too many requests from this IP, please try again after in an hour

Original Article: https://tutscoder.com/post/implement-rate-limiting-nodejs