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What is Rate Limiting & DoS Protection?
Definition
Security controls that restrict the number of requests a client can make to an API within a given time window, preventing abuse and denial of service attacks.
Security Impact
Without rate limiting, attackers can brute-force passwords, scrape entire databases, exhaust server resources, or rack up massive cloud bills (wallet attacks).
How to Remediate
Implement token bucket or sliding window algorithms, use Redis-backed rate limiters, apply per-IP and per-user limits, and add CAPTCHA for authentication endpoints.
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