Distributed denial-of-service attacks targeting large Internet service providers surged in the third quarter of last year as attackers began using a stealthy new tactic to sneak DDoS traffic past detection mechanisms. An analysis of DDoS data during Q3 2018 by Nexusguard showed attackers trying to overwhelm targeted sites, and even entire ISP — aka communications provider (CSP) — networks, by spreading attack traffic across a large number of IP prefixes.

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