DDoS protection module suggestion

[malte]

Hi Payam. Thanks for the offer, and you raise a valid point - it can be
done in a script as you say, but that means a lot more work for the
server, compared to handling it in a native nginx module, written in C.
Typically native C code is multiples faster than php, python, etc. This
is key if you are trying to stave off a DDoS attack coming in with tens
of thousands of attack requests every second.

Posted at Nginx Forum: http://forum.nginx.org/read.php?2,147105,147388#msg-147388