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Possible Duplicate:
DDoS attack, how to stop?

I'm getting 10MB attacks, IP spoofing, which is used fake IPs, causing high CPU usage of the machine, and falls all. What should I do to prevent it? Dedicated server configuration: Dual Core 2.8 2GB RAM Uplink 1Gbps Centos. Hug!

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marked as duplicate by Iain Mar 31 '12 at 20:48

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Figure out what it is about the attack that's allow that traffic rate to cause high CPU usage and fix it. – David Schwartz Apr 1 '12 at 1:16

Contact your ISP and ask them to drop it before it reaches you.

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I've talked with them, they only prevent attacks over 1Gbps – Cristian Augusto Mar 31 '12 at 20:49
    
Find an ISP who aren't shit. – Tom O'Connor Mar 31 '12 at 21:03
    
I use securedservers.com – Cristian Augusto Mar 31 '12 at 21:06
    
But how do I protect myself against it within the server? – Cristian Augusto Mar 31 '12 at 21:09
    
You can't. It's already saturated your link. IPTables to drop/reject the traffic might help, but you'll still be receiving the traffic, so even IPTables will have to use CPU to process the traffic. – Tom O'Connor Mar 31 '12 at 21:15

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