i am getting httpd attacks on my linux box any help please.. after every some hours i just see that the load is going to high and when i check top so there are much httpd running also the port 80 shows much connections
This type of attack can be caused by numerous sources. The method you use to block the attack will depend on how it is being executed. If it is a single IP blocking the attack, you can block the IP via iptables or with a .htaccess file. If it is a distributed attack, there are other tools you can load into apache to help.
In some cases, even with these added tools, you may not be able to mitigate the attack without using some network level tools.