I find this article post very very useful to check if your server is under ddos attack or not.
http://pc-freak.net/blog/how-to-check-if-your-linux-webserver-is-under-a-dos-attack/
http://www.webhostingtalk.com/showthread.php?t=930934
I find this article post very very useful to check if your server is under ddos attack or not.
http://pc-freak.net/blog/how-to-check-if-your-linux-webserver-is-under-a-dos-attack/