Messages in this thread | | | Date | Mon, 8 Mar 1999 17:20:21 -0600 (CST) | From | Dustin Marquess <> | Subject | Re: Simple DoS...out of resources? |
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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
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