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‘Bazooka’ attacks slowing Internet—securityexperts

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WASHINGTON — The Internet may have been slowed by one of the largest cyber attacks ever seen, which targeted a European group that patrols the Web for spam, security experts said Wednesday.

The attacks targeted Spamhaus, a Geneva-based volunteer group that publishes spam blacklists which are used by networks to filter out unwanted email, and led to cyberspace congestion which may have affected the overall Internet, according to Matthew Prince of the US security firm CloudFlare.

The attacks began last week, according to Spamhaus, after it placed on its blacklist the Dutch-based Web hosting site Cyberbunker, which claimed it was unfairly labeled as a haven for cybercrime and spam.

The origin of the attacks has not been identified. But a BBC report said Spamhaus alleged that Cyberbunker, in cooperation with “criminal gangs” from Eastern Europe and Russia, was behind the attack.

The New York Times quoted Sven Olaf Kamphuis, who claimed to be a spokesman for the attackers, as saying that Cyberbunker was retaliating against Spamhaus for “abusing their influence.”

CloudFlare, which was called for assistance by Spamhaus, said the attackers changed tactics after the first layer of protection was implemented last week.

“Rather than attacking our customers directly, they started going after the network providers CloudFlare uses for bandwidth,” Prince said.

“Once the attackers realized they couldn’t knock CloudFlare itself offline… they went after our direct peers.”

Prince said the so-called denial of service attack, which essentially bombards sites with traffic in an effort to disrupt, was “one of the largest ever reported.”

Over the last few days, he added, “we’ve seen congestion across several major Tier 1 (networks), primarily in Europe where most of the attacks were concentrated, that would have affected hundreds of millions of people even as they surfed sites unrelated to Spamhaus or CloudFlare.”

“If the Internet felt a bit more sluggish for you over the last few days in Europe, this may be part of the reason why,” he said in a blog post.

Prince noted that these attacks used tactics different than the “botnets” — these came from so-called “open resolvers” which “are typically running on big servers with fat pipes.”

“They are like bazookas and the events of the last week have shown the damage they can cause,” he said. “What’s troubling is that, compared with what is possible, this attack may prove to be relatively modest.”

A spokesman for the network security firm Akamai meanwhile told AFP that based on the published data, “the attack was likely the largest publicly acknowledged attack on record.”

“The cyber attack is certainly very large,” added Johannes Ullrich of US-based SANS Technology Institute, saying it was “a factor of 10 larger than similar attacks in the recent past.”

“But so far, I can’t verify that this affects Internet performance overall,” he told AFP.

Spamhaus, which also has offices in London, essentially patrols the Internet to root out spammers and provides updated lists of likely spammers to network operators around the world.

CloudFlare estimates that Spamhaus “is directly or indirectly responsible for filtering as much as 80 percent of daily spam messages.”

The attacks began after Spamhaus blacklisted Cyberbunker, a Web hosting firm that “offers anonymous hosting of anything except child porn and anything related to terrorism.”

Cyberbunker denounced the move on its blog.

“According to Spamhaus, CyberBunker is designated as a ‘rogue’ host and has long been a haven for cybercrime and spam,” the Cyberbunker statement said.

“Of course Spamhaus has not been able to prove any of these allegations.”

Prince said of the latest incident: “While we don’t know who was behind this attack, Spamhaus has made plenty of enemies over the years… We’re proud of how our network held up under such a massive attack and are working with our peers and partners to ensure that the Internet overall can stand up to the threats it faces.”


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  • Fulpol

    we have the same experience here in Timbuktu.. indeed, very slow internet connection..

    • wakakyapi

      ..and there was not even an attack. that’s life in timbuktu

      • AnastacioMamaril

        where on solar system is timbuktu anyway?

      • http://twitter.com/d3marketers SAMMY

        Malapit lang yan sa NY Cubao dre;)



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