nixCraft

Hi all,
I have a redhat server. At night i found that i have been attacked(dos and ddo. So I want to block it. Right now I have blocked icmp type 0. Is this will solve my problem? PLease help??

There are different types of DOS/DDoS attacks. Do you know attack type and size?

DoS can be usually handled but DDoS based attacks are dangerous.

Firewall can prevent few attack but remember that a firewall is not a DDoS migration solution.

Firewall works at layer 3 / 4 and allows or denies traffic as per rule set. If attack is from particular subnet you can simply block the entire subnet

Let me know if you need any further information

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Vivek | My personal blog
Linux Evangelist
Play hard stay cool

Thank you for information..Could you please post the link about it so that i can read more about it. Thanks