lkml.org 
[lkml]   [1999]   [Mar]   [8]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: Simple DoS...out of resources?
On Mon, 8 Mar 1999, Myrdraal wrote:

> On Mon, Mar 08, 1999 at 01:39:24PM -0500, rewt wrote:
> Hi,
> > It is very easy to crash a system simply by viewing a large file with
> > editor such as pico. It will eat up all the resources and do some
> > unpredictible things. In my case I viewed a 100mb file as it was reading
> > it, it filled up all the swap space which is 48mb. It killed most of the
> > processes including sendmail, sshd, X, syslog. Does anyone have any idea
> > how can i protect myself against that kind of DoS? My configuration:
> > P100, 48mb ram, 48mb swap running on kernel 2.2.2.
> You need to set user resource limits. This isn't a kernel problem. See
> the "ulimit" command if you use bash. Other shells probably use a different
> command.

As a side note, the new versions of the linux shadow suite
support the /etc/limits command to force limits on users, and I
believe the RedHat PAM package has a similiar option..

-Dustin


-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.rutgers.edu
Please read the FAQ at http://www.tux.org/lkml/

\
 
 \ /
  Last update: 2005-03-22 13:50    [from the cache]
©2003-2011 Jasper Spaans