Rate limiting caps how many requests a single user, IP, or account can make in a given time window — a simple but effective control against several common attack types.
Where it matters most
- Login pages: slows brute-force and credential-stuffing attempts dramatically
- Password reset / account recovery: prevents abuse used to enumerate valid accounts or exhaust email-sending quotas
- Public APIs: protects backend resources from being overwhelmed, accidentally or maliciously
- Contact/comment forms: reduces spam submission volume
Getting the balance right
Set limits generous enough that legitimate users rarely hit them (a mistyped password twice shouldn’t lock someone out), but tight enough to meaningfully slow automated abuse — and always pair it with clear, non-punitive messaging when a limit is hit.
FAQ
Does rate limiting alone stop determined attackers?
No — sophisticated attacks distribute requests across many IPs specifically to stay under per-IP limits; rate limiting is one layer, not a complete defense on its own.