Misconfigured Open DNS Resolvers Key To Massive DDoS Attacks

Posted by Unknown on Thursday March 28, 2013 @08:29AM from the check-your-sources dept.

msm1267 writes with an excerpt From Threat Post: "While the big traffic numbers and the spat between Spamhaus and illicit webhost Cyberbunker are grabbing big headlines, the underlying and percolating issue at play here has to do with the open DNS resolvers being used to DDoS the spam-fighters from Switzerland. Open resolvers do not authenticate a packet-sender's IP address before a DNS reply is sent back. Therefore, an attacker that is able to spoof a victim's IP address can have a DNS request bombard the victim with a 100-to-1 ratio of traffic coming back to them versus what was requested. DNS amplification attacks such as these have been used lately by hacktivists, extortionists and blacklisted webhosts to great success." Running an open DNS resolver isn't itself always a problem, but it looks like people are enabling neither source address verification nor rate limiting.

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Re:First post by Tynin · 2013-03-28 09:14 · Score: 1, Offtopic

In before the fight between those two guys and their walls of text...
I've begun to think it is actually just one guy just trolling (poorly) for all they are worth. Either that or it has turned into a meme that encourages the the likes of 4chan /b/tards to, in their own way, declare I am Spartacus(APK), just for the lolz...