Date: Fri, 16 Mar 2001 12:48:08 -0800 From: Kris Kennaway <kris@obsecurity.org> To: Ron 'The InSaNe One' Rosson <insane@lunatic.oneinsane.net> Cc: freeBSD-security@freeBSD.org Subject: Re: Multiple vendors FTP denial of service (fwd) Message-ID: <20010316124808.B98989@mollari.cthul.hu> In-Reply-To: <20010316071511.A46313@lunatic.oneinsane.net>; from insane@lunatic.oneinsane.net on Fri, Mar 16, 2001 at 07:15:12AM -0800 References: <98righ$100l$1@FreeBSD.csie.NCTU.edu.tw> <004b01c0ada9$99f7b540$db9497cf@singingtree.com> <20010315215913.A70990@mollari.cthul.hu> <20010316071511.A46313@lunatic.oneinsane.net>
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[-- Attachment #1 --] On Fri, Mar 16, 2001 at 07:15:12AM -0800, Ron 'The InSaNe One' Rosson wrote: > Kris Kennaway (kris@obsecurity.org) wrote: > > On Thu, Mar 15, 2001 at 03:42:29PM -0800, Michael A. Dickerson wrote: > > > > 4.1 from Aug 10th is hurt by it. > > > > > > > > ---Mike > > > > > > > > > > So is 4.3-beta (otherwise known as 4-stable) from March 8. ftpd uses 100% > > > cpu and memory use grows until the kernel runs out of swap space and starts > > > killing processes. This was an ftp connection with a regular username and > > > password, in an average home directory. > > > > I'm pretty sure (but haven't tested) that resource limits will prevent > > this problem. Your ftpd shouldn't be using large amount of memory > > under normal operating procedures, so you can set those to reasonable > > values and not suffer any ill effects. > > > > Kris > > But, by default are the resource limits set properly to avoid this out > of the box? Or does one have to make the mod themselves. You have to tune resource limits as appropriate for your local operating environment. Kris [-- Attachment #2 --] -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.0.4 (FreeBSD) Comment: For info see http://www.gnupg.org iD8DBQE6snwHWry0BWjoQKURAo1XAJ41taxJNIk40WyL0E75yWDW06DPTACfZovh gbB3L8KuAEgdoNeNgqI74hA= =rrM9 -----END PGP SIGNATURE-----home | help
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