From owner-freebsd-questions@freebsd.org Sat Sep 29 14:09:14 2018 Return-Path: Delivered-To: freebsd-questions@mailman.ysv.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1]) by mailman.ysv.freebsd.org (Postfix) with ESMTP id 78F5F109F653 for ; Sat, 29 Sep 2018 14:09:14 +0000 (UTC) (envelope-from david+dated+1538662145.ae144b@skytracker.ca) Received: from mailman.ysv.freebsd.org (mailman.ysv.freebsd.org [IPv6:2001:1900:2254:206a::50:5]) by mx1.freebsd.org (Postfix) with ESMTP id 0CA157BF54 for ; Sat, 29 Sep 2018 14:09:14 +0000 (UTC) (envelope-from david+dated+1538662145.ae144b@skytracker.ca) Received: by mailman.ysv.freebsd.org (Postfix) id C5AAC109F652; Sat, 29 Sep 2018 14:09:13 +0000 (UTC) Delivered-To: questions@mailman.ysv.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1]) by mailman.ysv.freebsd.org (Postfix) with ESMTP id B4495109F651 for ; Sat, 29 Sep 2018 14:09:13 +0000 (UTC) (envelope-from david+dated+1538662145.ae144b@skytracker.ca) Received: from 3s1.com (3s1.com [162.213.106.199]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (Client CN "3s1.com", Issuer "CA Cert Signing Authority" (not verified)) by mx1.freebsd.org (Postfix) with ESMTPS id 473E97BF53 for ; Sat, 29 Sep 2018 14:09:13 +0000 (UTC) (envelope-from david+dated+1538662145.ae144b@skytracker.ca) Received: from 3s1.com (localhost [127.0.0.1]) by 3s1.com (8.14.9/8.14.9) with ESMTP id w8TE966K097479 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=NO) for ; Sat, 29 Sep 2018 10:09:06 -0400 (EDT) (envelope-from david+dated+1538662145.ae144b@skytracker.ca) Received: (from david@localhost) by 3s1.com (8.14.9/8.14.9/Submit) id w8TE954P097478 for questions@freebsd.org; Sat, 29 Sep 2018 10:09:05 -0400 (EDT) (envelope-from david+dated+1538662145.ae144b@skytracker.ca) X-Authentication-Warning: 3s1.com: david set sender to david+dated+1538662145.ae144b@skytracker.ca using -f Received: by 3s1.com (tmda-sendmail, from uid 1000); Sat, 29 Sep 2018 10:09:03 -0400 Date: Sat, 29 Sep 2018 10:09:02 -0400 To: Polytropon Cc: questions@freebsd.org Subject: Re: dictionary attacks check Message-ID: <20180929140901.GA93349@skytracker.ca> References: <20180926135329.GA24139@skytracker.ca> <20180927211339.63a65ae6.freebsd@edvax.de> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20180927211339.63a65ae6.freebsd@edvax.de> User-Agent: Mutt/1.4.2.3i X-Delivery-Agent: TMDA/1.1.12 (Macallan) From: David Banning X-BeenThere: freebsd-questions@freebsd.org X-Mailman-Version: 2.1.27 Precedence: list List-Id: User questions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sat, 29 Sep 2018 14:09:14 -0000 On Thu, Sep 27, 2018 at 09:13:39PM +0200, Polytropon wrote: > On Wed, 26 Sep 2018 09:53:29 -0400, David Banning wrote: > > I wonder what the best way is of checking my system to see > > if it is commiting these dictionary attacks. > > > > My system it somewhat older; > > > > FreeBSD 3s1.com 9.3-RELEASE FreeBSD 9.3-RELEASE #0 > > > > Any pointers would be helpful. > > First of all, check the information you have in the logs; > /var/log/security is a good point to start. Also check > the log files for services you run, maybe /var/log/maillog, > /var/log/xfer.log, /var/log/ftpd.log. Checked all my logs - I don't actually see any strange actvity. I have requested that the blacklisting entity remove my IP from the blacklist. All other blacklists continue to show my server as clean. Every now and then a smaller system flags my email as coming from an infected server. It may be left over from a couple of times my server was infected many years past or it could be erroneous - something to which the notifying server admits happens often enough. > > Also check if the services you run start exhibiting > strange behaviour. In case you notice _that_ - problems > have already started... > > > > -- > Polytropon > Magdeburg, Germany > Happy FreeBSD user since 4.0 > Andra moi ennepe, Mousa, ... >