From owner-freebsd-security@FreeBSD.ORG  Mon Dec 19 21:28:21 2005
Return-Path: <owner-freebsd-security@FreeBSD.ORG>
X-Original-To: freebsd-security@freebsd.org
Delivered-To: freebsd-security@freebsd.org
Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125])
	by hub.freebsd.org (Postfix) with ESMTP id 0D6C416A41F
	for <freebsd-security@freebsd.org>;
	Mon, 19 Dec 2005 21:28:21 +0000 (GMT) (envelope-from MH@kernel32.de)
Received: from crivens.unixoid.de (crivens.unixoid.de [81.169.171.191])
	by mx1.FreeBSD.org (Postfix) with ESMTP id 5F70E43D5D
	for <freebsd-security@freebsd.org>;
	Mon, 19 Dec 2005 21:28:20 +0000 (GMT) (envelope-from MH@kernel32.de)
Received: from localhost (localhost [127.0.0.1])
	by crivens.unixoid.de (Postfix) with ESMTP id 4506F413A;
	Mon, 19 Dec 2005 22:28:18 +0100 (CET)
Received: from crivens.unixoid.de ([127.0.0.1])
	by localhost (crivens.unixoid.de [127.0.0.1]) (amavisd-new, port 10024)
	with ESMTP id 65535-07; Mon, 19 Dec 2005 22:28:14 +0100 (CET)
Received: from [85.178.84.52] (e178084052.adsl.alicedsl.de [85.178.84.52])
	by crivens.unixoid.de (Postfix) with ESMTP id AF26F4132;
	Mon, 19 Dec 2005 22:28:14 +0100 (CET)
Message-ID: <43A725ED.5090502@kernel32.de>
Date: Mon, 19 Dec 2005 22:28:13 +0100
From: Marian Hettwer <MH@kernel32.de>
User-Agent: Mozilla Thunderbird 1.0.2 (Macintosh/20050317)
X-Accept-Language: en-us, en
MIME-Version: 1.0
To: Hadi Maleki <freebsdlist@nimahost.net>
References: <E1EoRW4-000AqG-O2@host84.nimahost.net>
In-Reply-To: <E1EoRW4-000AqG-O2@host84.nimahost.net>
Content-Type: text/plain; charset=ISO-8859-15; format=flowed
Content-Transfer-Encoding: 7bit
X-Virus-Scanned: amavisd-new at unixoid.de
Cc: freebsd-security@freebsd.org
Subject: Re: Brute Force Detection + Advanced Firewall Policy
X-BeenThere: freebsd-security@freebsd.org
X-Mailman-Version: 2.1.5
Precedence: list
List-Id: "Security issues \[members-only posting\]"
	<freebsd-security.freebsd.org>
List-Unsubscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-security>, 
	<mailto:freebsd-security-request@freebsd.org?subject=unsubscribe>
List-Archive: <http://lists.freebsd.org/pipermail/freebsd-security>
List-Post: <mailto:freebsd-security@freebsd.org>
List-Help: <mailto:freebsd-security-request@freebsd.org?subject=help>
List-Subscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-security>, 
	<mailto:freebsd-security-request@freebsd.org?subject=subscribe>
X-List-Received-Date: Mon, 19 Dec 2005 21:28:21 -0000

Hi there,

Hadi Maleki wrote:
> Any BFD/AFP softwares available for FreeBSD 4.10?
>
If you would update to a recent FreeBSD Release, you could probably use 
some nice pf(4) things...

> Im getting flooded with ssh and ftp attempts.
>
I recently stumbled over quite a nice pf.conf (see man pfctl for 
details), which blacklists for instance ssh connections if the occur to 
often in a certain amount of time.
For Example:
# sshspammer table
table <sshspammer> persist
block log quick from <sshspammer>

# sshspammer
# more than 6 ssh attempts in 15 seconds will be blocked ;)
pass in quick on $ext_if proto tcp to ($ext_if) port ssh $tcp_flags 
(max-src-conn 10, max-src-conn-rate 6/15, overload <sshspammer> flush
global)

HTH,
Marian