Re: Simple DOS attack on FW-1

From: Rogier Wolff (R.E.Wolffat_private)
Date: Wed Aug 04 1999 - 02:56:24 PDT

  • Next message: Steve Birnbaum: "Re: FW-1 DOS attack: PART II"

    Lance Spitzner wrote:
    > > Also, if they implemented a circular buffer where connections that had
    > > been idle the longest were disconnected in favor of new connections their
    > > scalability might increase some.
    >
    > Excellent recommendation, I'll pass it along to Check Point!
    
    That means I can still DOS a site: If I send 500 packets a second, I
    can wrap the connection table in 100 seconds. That means that the
    idle-timer is reduced from an hour to less than two minutes.
    
    The only solution is to only allow the longer timeout once BOTH sides
    have sent a packet.
    
    			Roger.
    
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