NestJS · Middle · Question 71 of 75

With several app instances, why does the default throttler storage give wrong limits?

1Throttler doesn't work behind load balancers at all
✓Correct answer: It keeps counters in each process's memory, so each instance allows the full limit; a shared store like Redis fixes it
3Throttler counts only GET requests

Explanation

Configure a Redis storage for ThrottlerModule, and trust the proxy so the real client IP is used.

Further reading

NestJS: Rate limiting ↗

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