Date: Sat, 21 Apr 2001 20:16:55 +0200 From: Edwin Groothuis <edwin@mavetju.org> To: josh gregory <josh_gregory05@hotmail.com> Cc: freebsd-questions@FreeBSD.ORG Subject: Re: question about FreeBSD Message-ID: <20010421201655.G504@cgmd76206.chello.nl> In-Reply-To: <F154sxpTljBOh8s4KWi000042a1@hotmail.com>; from josh_gregory05@hotmail.com on Sat, Apr 21, 2001 at 01:00:46PM -0500 References: <F154sxpTljBOh8s4KWi000042a1@hotmail.com>
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On Sat, Apr 21, 2001 at 01:00:46PM -0500, josh gregory wrote:
> if one logged into a remote box and issued the command --->
>
> yes '/.(++),\ 0123456789 @][<->*^% ABCDE FGHIJKLM NOPQRSTU VWXYZ :{};
> abcdefghijklmn'
>
> what would one possibly be using this command for?
If you look at the function for the yes command (man 1 yes), you'll
see that it returns a lot of y's. Or the string you give on the
commandline. So for this one, that string is returned. When doing
this on my local LAN, I got about 1.7M kilobits per second of
traffic. Imagine doing this from ten machines on my local lan, it
would kill the total traffic towards this computer (it's only a
10Mb ethernet, that's enough for educational purposes here at home
:-). So, I hack your computer (ISDN link maybe), go back to another
hacked computer and start this program. That will completly saturate
your link. If you have a fast link, I just use more of my hacked
computers and you won't be able to do anything anymore over that
link.
So euh... see where he was coming from and what he was doing on your computer.
Edwin, could be totally wrong about this.
--
Edwin Groothuis | Personal website: http://www.MavEtJu.org
edwin@mavetju.org | Interested in MUDs? Visit Fatal Dimensions:
------------------+ http://FatalDimensions.nl.eu.org/
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