Mitigate HTTP connect floods with HAproxy + Apache

view story

http://serverfault.com – Our infrastructure consists of load balancers running HAProxy and Apache, which forward traffic to our app servers running just Apache. The past few days, we've been seeing connection floods which the load balancers happily pass along, but the connections quickly overwhelm our application servers. They become unresponsive, and our only mitigation tactic is to launch more application servers to sustain the flood. At first we couldn't identify why these servers would go down because there were no real spikes traffic on the load balancers, but after some investigation we see that the number of Ap (HowTos)