NoCache

Nginx came with a rate limit module called ngx_http_limit_req_module, which is quite handy for throttling harmful requests like DoS attack. And the module uses the leaky bucket algorithm to handle the connections, it could allow certain amount of burst requests in a short period of time to suit the use cases.

I recently wrote a very simple IP address based rate limit module called rt-limit to throttle requests for this blog. Although rate limiting is more commonly done on reverse proxy like Nginx and Apache, being able to manage traffic on your own back-end server is always more flexible.