From: Mike Fedyk <mfedyk@matchmail.com>
To: Alan Cox <alan@lxorguk.ukuu.org.uk>
Cc: Breno <brenosp@brasilsec.com.br>,
Valdis.Kletnieks@vt.edu, Stan Bubrouski <stan@ccs.neu.edu>,
Linux Kernel Mailing List <linux-kernel@vger.kernel.org>
Subject: Re: Size of Tasks during ddos
Date: Thu, 11 Sep 2003 14:30:06 -0700 [thread overview]
Message-ID: <20030911213006.GD26618@matchmail.com> (raw)
In-Reply-To: <1063315578.3886.9.camel@dhcp23.swansea.linux.org.uk>
On Thu, Sep 11, 2003 at 10:26:19PM +0100, Alan Cox wrote:
> On Iau, 2003-09-11 at 22:23, Mike Fedyk wrote:
> > On Thu, Sep 11, 2003 at 07:41:10PM +0100, Alan Cox wrote:
> > > On Iau, 2003-09-11 at 18:27, Breno wrote:
> > > > This is a Syn Flood DDoS
> > >
> > > echo "1" >/proc/sys/net/ipv4/tcp_syncookies
> > >
> > > End of problem.
> >
> > And why isn't this on by default when it's compiled in?
>
> Syncookies protect you from DoS stuff but they have other side
> effects on efficiency when they are in use.
Care to point me to a thread in the archives? I'd like to read more about
this.
next prev parent reply other threads:[~2003-09-11 21:30 UTC|newest]
Thread overview: 19+ messages / expand[flat|nested] mbox.gz Atom feed top
2003-10-11 22:34 Size of Tasks during ddos Breno
2003-09-11 0:27 ` [OT] " Joshua Kwan
2003-09-11 2:10 ` Stan Bubrouski
2003-09-11 12:33 ` Breno Silva
2003-09-11 14:19 ` Valdis.Kletnieks
2003-09-11 17:27 ` Breno
2003-09-11 18:41 ` Alan Cox
2003-09-11 21:23 ` Mike Fedyk
2003-09-11 21:26 ` Alan Cox
2003-09-11 21:30 ` Mike Fedyk [this message]
2003-09-11 21:40 ` Alan Cox
2003-09-11 22:15 ` Arjan van de Ven
[not found] ` <002801c3789e$7a665ac0$9f0210ac@forumci.com.br>
[not found] ` <1063312815.3886.0.camel@dhcp23.swansea.linux.org.uk>
2003-10-11 22:09 ` Breno
2003-09-11 22:14 ` Alan Cox
2003-09-12 15:36 ` insecure
2003-09-12 17:56 ` Mail header times was: " Mike Fedyk
2003-09-11 17:28 ` Mike Fedyk
2003-09-23 21:08 ` [OT] " bill davidsen
[not found] <um6w.4VI.5@gated-at.bofh.it>
[not found] ` <unFh.7rt.7@gated-at.bofh.it>
[not found] ` <upe3.1uM.3@gated-at.bofh.it>
[not found] ` <uyU4.7Sz.9@gated-at.bofh.it>
[not found] ` <uACA.2fO.3@gated-at.bofh.it>
[not found] ` <uDTR.7A2.35@gated-at.bofh.it>
[not found] ` <uEGe.uJ.21@gated-at.bofh.it>
[not found] ` <uHb2.76X.15@gated-at.bofh.it>
[not found] ` <uHb6.76X.29@gated-at.bofh.it>
[not found] ` <uHkC.7kf.7@gated-at.bofh.it>
[not found] ` <uHuj.7yv.9@gated-at.bofh.it>
2003-09-11 23:08 ` Andi Kleen
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