Why Fixed-Window Rate Limiters Fail (And How to Fix Them with Math)

If you’ve ever built an Express API, you’ve probably reached for standard rate-limiting middleware to protect your login or payment endpoints from DDoS and brute-force attacks. Under the hood, most simple limiters use a Fixed-Window Counter. It’s easy to write: count incoming requests, and once the minute rolls over, reset the counter to zero.... Weiterlesen