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From: wjwlsn <ibillwilson@gmail.com>
Newsgroups: comp.misc
Subject: Huge DDoS Attack Hits CloudFlare
Date: Tue, 11 Feb 2014 09:55:20 -04-59 (UTC)
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The attack used Network Time Protocol (NTP) Reflection/Amplification to generate a 400 Gbps surge.

More at http://www.itnews.com.au/News/372033,worlds-largest-ddos-strikes-us-europe.aspx

Info about the attack vector and mitigation at http://www.us-cert.gov/ncas/alerts/TA14-013A