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Misconfigured Open DNS Resolvers Key To Massive DDoS Attacks

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.

3 of 179 comments (clear)

  1. Re:First post by Tynin · · 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...

  2. It really isn't me... apk by Anonymous Coward · · Score: -1, Offtopic

    You're stupid enough to think it's me? A corrupt slashdot luser has infiltrated the moderation system to downmod all my posts while impersonating me.

    Nearly 170++ times that I know of @ this point for all of March 2013 so far, & others here have told you to stop - take the hint, lunatic (leave slashdot)...

    Sorry folks - but whoever the nutjob is that's attempting to impersonate me, & upset the rest of you as well, has SERIOUS mental issues, no questions asked! I must've gotten the better of him + seriously "gotten his goat" in doing so in a technical debate & his "geek angst" @ losing to me has him doing the:

    ---

    A.) $10,000 challenges, ala (where the imposter actually TRACKED + LISTED the # of times he's done this no less, & where I get the 170 or so times I noted above) -> http://it.slashdot.org/comments.pl?sid=3585795&cid=43285307

    &/or

    B.) Reposting OLD + possibly altered models - (this I haven't checked on as to altering the veracity of the info. being changed) of posts of mine from the past here

    ---

    (Albeit massively repeatedly thru all threads on /. this March 2013 nearly in its entirety thusfar).

    * Personally, I'm surprised the moderation staff here hasn't just "blocked out" his network range yet honestly!

    (They know it's NOT the same as my own as well, especially after THIS post of mine, which they CAN see the IP range I am coming out of to compare with the ac spamming troll doing the above...).

    APK

    P.S.=> Again/Stressing it: NO guys - it is NOT me doing it, as I wouldn't waste that much time on such trivial b.s. like a kid might...

    Plus, I only post where hosts file usage is on topic or appropriate for a solution & certainly NOT IN EVERY POST ON SLASHDOT (like the nutcase trying to "impersonate me" is doing for nearly all of March now, & 170++ times that I know of @ least)... apk

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