~4,300 publicly reachable servers are posing a new DDoS hazard to the Internet

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Criminals are upping the potency of distributed denial-of-service attacks with a technique that abuses a widely used Internet protocol that drastically increases the amount of junk traffic directed at targeted servers.

DDoSes are attacks that flood a website or server with more data than it can handle. The result is a denial of service to people trying to connect to the service. As DDoS-mitigation services develop protections that allow targets to withstand ever-larger torrents of traffic, the criminals respond with new ways to make the most of their limited bandwidth.

Getting amped up

In so-called amplification attacks, DDoSers send requests of relatively

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