Beginner LevelWeb Security & Cyber Defense
Why is Rate Limiting essential for login, password reset, and sensitive API endpoints?
❓ Interview Prompt: Explain Rate Limiting, Credential Stuffing, Brute-Force Password Cracking, API abuse, and Redis sliding window limiters.
Rate Limiting caps the maximum number of requests a client IP or user account can make within a specified time window:
Threats Neutralized:
1
Credential Stuffing: Automated bots testing millions of leaked username/password pairs.
2
Brute-Force Cracking: Guessing passwords or MFA 6-digit PIN codes.
3
Resource Exhaustion: Preventing API scraping or server Denial of Service.
•
Implementation: Enforce rate limits on sensitive endpoints ('POST /login', '/reset-password') using Redis sliding window limiters.
Code Implementation Example
typescript
import rateLimit from 'express-rate-limit';
// Strict Rate Limiter for Login Endpoint
export const loginRateLimiter = rateLimit({
windowMs: 15 * 60 * 1000, // 15 minutes
max: 5, // Limit each IP to 5 login attempts per window
message: { error: 'Too many login attempts. Please try again in 15 minutes.' }
});
app.post('/api/v1/login', loginRateLimiter, handleLogin);💡Applying strict rate limiting to login endpoints using Express rate limit middleware.
🎯 Interview Key Takeaway
Apply strict rate limiting to authentication endpoints to neutralize brute-force password cracking and credential stuffing attacks.
#Rate Limiting#Brute Force#Express#Beginner
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