DDoS Attacks Abuse TFTP for Reflection and Amplification
Several months ago, security researchers at Edinburgh Napier University published a paper on a distributed denial of service (DDoS) reflection and amplification method leveraging the TFTP (Trivial File Transfer Protocol) protocol, and security researchers at Akamai now warn of real-life attacks leveraging this technique.
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Story added 3. June 2016, content source with full text you can find at link above.