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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..


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