Dos attack

From: Jim G. (
Date: 08/24/04

Date: Mon, 23 Aug 2004 22:24:22 GMT

How do I stop a Dos Syn Attack. My isp has already stopped Upd connections
from hitting my servers, but I still have 225,000 connections to my 5
servers from a Syn attack. My load balancer is doing well keeping up and I
read something about tcp_syncookies will that help if I enable it? I am
behind a firewall, but its still causing my site to slow.