"Early in the attack, unknown perpetrators targeted SCO's web servers with a SYN flood of approximately 34,000 packets per second," CAIDA said. "Together www.sco.com and ftp.sco.com experienced a SYN flood of over 50,000 packets-per-second early Thursday morning."
SCO's statement attributing its outage to a DDoS attack had been widely questioned following a critique of the SCO press release at the Groklaw web site. CAIDA has previously used its technology to document Internet traffic events including the Code Red and Slammer worms.
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