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Date: Tue, 17 Jul 2012 01:36:34 -0700 (PDT) From: David Miller <davem@...emloft.net> To: eric.dumazet@...il.com Cc: netdev@...r.kernel.org, kkiran@...adcom.com Subject: Re: [PATCH net-next v2] tcp: implement RFC 5961 3.2 From: Eric Dumazet <eric.dumazet@...il.com> Date: Tue, 17 Jul 2012 10:13:05 +0200 > From: Eric Dumazet <edumazet@...gle.com> > > Implement the RFC 5691 mitigation against Blind > Reset attack using RST bit. > > Idea is to validate incoming RST sequence, > to match RCV.NXT value, instead of previouly accepted > window : (RCV.NXT <= SEG.SEQ < RCV.NXT+RCV.WND) > > If sequence is in window but not an exact match, send > a "challenge ACK", so that the other part can resend an > RST with the appropriate sequence. > > Add a new sysctl, tcp_challenge_ack_limit, to limit > number of challenge ACK sent per second. > > Add a new SNMP counter to count number of challenge acks sent. > (netstat -s | grep TCPChallengeACK) > > Signed-off-by: Eric Dumazet <edumazet@...gle.com> Looks good, applied, thanks Eric. -- To unsubscribe from this list: send the line "unsubscribe netdev" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
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