From owner-freebsd-questions@FreeBSD.ORG Tue May 9 14:54:05 2006 Return-Path: X-Original-To: freebsd-questions@freebsd.org Delivered-To: freebsd-questions@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id 60A9716A407 for ; Tue, 9 May 2006 14:54:05 +0000 (UTC) (envelope-from freebsdutah@yahoo.com) Received: from web32413.mail.mud.yahoo.com (web32413.mail.mud.yahoo.com [68.142.207.206]) by mx1.FreeBSD.org (Postfix) with SMTP id 221AE43D5A for ; Tue, 9 May 2006 14:54:04 +0000 (GMT) (envelope-from freebsdutah@yahoo.com) Received: (qmail 71701 invoked by uid 60001); 9 May 2006 14:54:03 -0000 DomainKey-Signature: a=rsa-sha1; q=dns; c=nofws; s=s1024; d=yahoo.com; h=Message-ID:Received:Date:From:Subject:To:MIME-Version:Content-Type:Content-Transfer-Encoding; b=Q8IWSMTBJGBL4Eny9HZTyOZzghUxrGy6YXE09ApQGLyhcb8FOye2areINbKXF0FK+olqVHkJak3y1U9obrazhWE2475Q35C9vZhokIxp6zrAtm/kDxySBVTQTQ3n66kL23FFTxUAA2ddAcZ1f3q4fOD+0njc36b7bw/VGUNBWug= ; Message-ID: <20060509145403.71699.qmail@web32413.mail.mud.yahoo.com> Received: from [207.109.153.102] by web32413.mail.mud.yahoo.com via HTTP; Tue, 09 May 2006 07:54:03 PDT Date: Tue, 9 May 2006 07:54:03 -0700 (PDT) From: "M. Goodell" To: FreeBSD Questions MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1 Content-Transfer-Encoding: 8bit X-Content-Filtered-By: Mailman/MimeDel 2.1.5 Subject: System Intrustion Detection X-BeenThere: freebsd-questions@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: User questions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 09 May 2006 14:54:05 -0000 More and more each day I am seeing my root emails contain hundreds of entries like this: May 8 02:23:35 warpstone sshd[26092]: Failed password for root from 222.185.245.208 port 50519 ssh2 May 8 16:37:41 warpstone ftpd[34713]: FTP LOGIN FAILED FROM 211.44.250.152, Administrator Basically, people are attemtpting to hack into my server often with a few thousands of attempts each day. What measures can I take to stop these attempts? Is there a way I can detect these attacks and automatically cut them off? Are any of the security ports effective against this? Thank you! M Goodell --------------------------------- Yahoo! Messenger with Voice. PC-to-Phone calls for ridiculously low rates.