nginx limit_req and limit_conn not working to prevent DoS attack

[Phani Sreenivasa Prasad]

I assume it would help dropping connections . since we are setting rate
limit per ip and any client IP which is suspicious by sending requests in
bulk(lets say 10000 connections/requests), it makes sense to not to accept
connections/requests from that IP.

Thoughts ??

Posted at Nginx Forum: https://forum.nginx.org/read.php?2,275796,275798#msg-275798