07-04-2015, 06:18 AM
It won't work.
The moment the attack hits the machine its too late, you can't sort that with software.
It depends really on the attack type. If it's just a TCP attack to exhaust apache resources then it will work somewhat. Although personally it's way better to just set a rule in the firewall to limit only a few connections from one IP address. When it comes to UDP then you need hardware in between you and the attacker with there being no way around it (other than mitigation tricks like null routing etc).