From owner-freebsd-hackers@FreeBSD.ORG  Fri Apr 16 08:39:56 2010
Return-Path: <owner-freebsd-hackers@FreeBSD.ORG>
Delivered-To: freebsd-hackers@freebsd.org
Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34])
	by hub.freebsd.org (Postfix) with ESMTP id 121C8106566C;
	Fri, 16 Apr 2010 08:39:56 +0000 (UTC)
	(envelope-from davidxu@freebsd.org)
Received: from freefall.freebsd.org (freefall.freebsd.org
	[IPv6:2001:4f8:fff6::28])
	by mx1.freebsd.org (Postfix) with ESMTP id 03E4D8FC1D;
	Fri, 16 Apr 2010 08:39:56 +0000 (UTC)
Received: from apple.my.domain (localhost [127.0.0.1])
	by freefall.freebsd.org (8.14.4/8.14.4) with ESMTP id o3G8drF5098745;
	Fri, 16 Apr 2010 08:39:55 GMT (envelope-from davidxu@freebsd.org)
Message-ID: <4BC82259.90203@freebsd.org>
Date: Fri, 16 Apr 2010 16:39:53 +0800
From: David Xu <davidxu@freebsd.org>
User-Agent: Thunderbird 2.0.0.9 (X11/20080612)
MIME-Version: 1.0
To: Jeremy Lea <reg@freebsd.org>
References: <20091002201039.GA53034@flint.openpave.org>
In-Reply-To: <20091002201039.GA53034@flint.openpave.org>
Content-Type: text/plain; charset=ISO-8859-1; format=flowed
Content-Transfer-Encoding: 7bit
Cc: freebsd-hackers@freebsd.org
Subject: Re: Distributed SSH attack
X-BeenThere: freebsd-hackers@freebsd.org
X-Mailman-Version: 2.1.5
Precedence: list
List-Id: Technical Discussions relating to FreeBSD
	<freebsd-hackers.freebsd.org>
List-Unsubscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-hackers>, 
	<mailto:freebsd-hackers-request@freebsd.org?subject=unsubscribe>
List-Archive: <http://lists.freebsd.org/pipermail/freebsd-hackers>
List-Post: <mailto:freebsd-hackers@freebsd.org>
List-Help: <mailto:freebsd-hackers-request@freebsd.org?subject=help>
List-Subscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-hackers>,
	<mailto:freebsd-hackers-request@freebsd.org?subject=subscribe>
X-List-Received-Date: Fri, 16 Apr 2010 08:39:56 -0000

Jeremy Lea wrote:
> Hi,
> 
> This is off topic to this list, but I dont want to subscribe to -chat
> just to post there...  Someone is currently running a distributed SSH
> attack against one of my boxes - one attempted login for root every
> minute or so for the last 48 hours.  They wont get anywhere, since the
> box in question has no root password, and doesn't allow root logins via
> SSH anyway...
> 
> But I was wondering if there were any security researchers out there
> that might be interested in the +-800 IPs I've collected from the
> botnet?  The resolvable hostnames mostly appear to be in Eastern Europe
> and South America - I haven't spotted any that might be 'findable' to
> get the botnet software.
> 
> I could switch out the machine for a honeypot in a VM or a jail, by
> moving the host to a new IP, and if you can think of a way of allowing
> the next login to succeed with any password, then you could try to see
> what they delivered...  But I don't have a lot of time to help.
> 
> Regards,
>   -Jeremy
> 

Try to change SSH port to something other than default port 22,
I always did this for my machines, e.g, change them to 13579 :-)

Regards,
David Xu