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blackholing

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Discarding packets in a network based on some criterion. For example, an ISP might blackhole packets coming from a known spammer or from a file sharing application such as BitTorrent. An ISP that has its own packet-switched phone service may blackhole VoIP packets from another vendor.
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Many companies rely on reactive measures such as blackholing, router filters and firewalls, but all these methods are either inefficient, not sophisticated enough to protect against cyber criminals or can only be configured to specific external sources.
Cyber extortion is now a very real threat--is your business at risk? by Nazario, Jose / Database and Network Journal
Flexible anomaly mitigation support, including ACL, Blackholing, Cisco Guard, etc.
Narus Announces NarusInsight Secure Suite 6 by Business Wire
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