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Spam fighter, spammer spat becomes massive DDoS attack

John P. Mello | March 28, 2013
Spamhaus blacklisting of Dutch company results in cyberattack of historical proportions

Once that happened, the attack began to affect service across the Internet.

Addressing the open resolver problem would put major crimp in the ability of Black Hats to mount these kinds of attacks. A website that aims to do that was launched this week. Called the Open DNS Resolver Product, it is maintaining a list of open resolvers -- it has listed 27 million resolvers -- and asking anyone with a listed resolver to limit access to it.

"Hopefully the list will put a bit of pressure on anybody running an open resolver to close it down," Henry Spern, a threat researcher with Cisco told CSO. "No network administrator wants their resources being used to attack someone else."


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