This question already has an answer here:
- I am under DDoS. What can I do? 5 answers
I'm under a DDOS attack right now, and the attacker has his zombies sending POST requests to one of my pages. At first, nginx replies in only a few seconds, but after a while it starts building up; nginx is taking 10 minutes to finish the responses to these requests! But why? I can't understand why. I can't even figure out why I can't stop it.
I've got these set:
client_header_timeout 5; client_body_timeout 5; keepalive_timeout 5 30; send_timeout 5;
So should it not be timing out after 5 seconds? Why does it continue to 600 seconds or more? Is there a way I can figure out what type of attack this is? Slow header? Slow POST? How can I detect what this attack is and how can I stop it?
It should also be noted that the connections are passing through a load balancer and a Squid Cache reverse proxy, so the only way I can read the clients' true IP is through specific HTTP headers