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Interesting APF & BFD failure...

Discussion in 'General Discussion' started by rs-freddo, Dec 23, 2005.

  1. rs-freddo

    rs-freddo Well-Known Member

    May 13, 2003
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    Root Administrator
    My server was getting brute forced, no problem they were going slow and easy - didn't raise load any. BUT I kept getting emails from BFD saying they were already banned??????????? Hours later!!!!!!!!!!!!!!


    Anyway the banned address was which doesn't actually resolve. However on checking the messages log I found the IP to be
    so I
    apf -d
    and that seems to have solved the problem.

    Anyway it's interesting that someone has come up with a way to fool APF & BFD into NOT banning them, so they can do brute forces till the cows come home...
    Maybe it's time I upgraded my APF...

    Anyway I thought this might be of interest to other server owners.
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  2. chirpy

    chirpy Well-Known Member

    Jun 15, 2002
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    Go on, have a guess
    There are certainly flaws in the way APF and BFD do things. I've become somewhat disillusioned by APF and BFD since using it for quite some time and fighting through some of the major bugs seen in recent releases. Thinking of trying out some of the other recommended firewall/brute-force combinations out there.
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