From owner-freebsd-questions@freebsd.org Mon Oct 2 00:11:51 2017 Return-Path: Delivered-To: freebsd-questions@mailman.ysv.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:1900:2254:206a::19:1]) by mailman.ysv.freebsd.org (Postfix) with ESMTP id 75A9AE31BAE for ; Mon, 2 Oct 2017 00:11:51 +0000 (UTC) (envelope-from freebsd@edvax.de) Received: from mailrelay15.qsc.de (mailrelay15.qsc.de [212.99.187.254]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (Client CN "*.antispameurope.com", Issuer "TeleSec ServerPass DE-2" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id E11C473C55 for ; Mon, 2 Oct 2017 00:11:50 +0000 (UTC) (envelope-from freebsd@edvax.de) Received: from mx01.qsc.de ([213.148.129.14]) by mailrelay15.qsc.de; Mon, 02 Oct 2017 02:11:42 +0200 Received: from r56.edvax.de (port-92-195-63-92.dynamic.qsc.de [92.195.63.92]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (No client certificate requested) by mx01.qsc.de (Postfix) with ESMTPS id 8CA193CBF9; Mon, 2 Oct 2017 02:11:41 +0200 (CEST) Received: from r56.edvax.de (localhost [127.0.0.1]) by r56.edvax.de (8.14.5/8.14.5) with SMTP id v920BeEI002430; Mon, 2 Oct 2017 02:11:40 +0200 (CEST) (envelope-from freebsd@edvax.de) Date: Mon, 2 Oct 2017 02:11:40 +0200 From: Polytropon To: The Doctor Cc: freebsd-questions@freebsd.org Subject: Re: Weird turnoff Message-Id: <20171002021140.931f17de.freebsd@edvax.de> In-Reply-To: <20171001232531.GA18260@doctor.nl2k.ab.ca> References: <20171001232531.GA18260@doctor.nl2k.ab.ca> Reply-To: Polytropon Organization: EDVAX X-Mailer: Sylpheed 3.1.1 (GTK+ 2.24.5; i386-portbld-freebsd8.2) Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit X-cloud-security-sender: freebsd@edvax.de X-cloud-security-recipient: freebsd-questions@freebsd.org X-cloud-security-Virusscan: CLEAN X-cloud-security-disclaimer: This E-Mail was scanned by E-Mailservice on mailrelay15.qsc.de with 1E9FF683619 X-cloud-security-connect: mx01.qsc.de[213.148.129.14], TLS=1, IP=213.148.129.14 X-cloud-security: scantime:.1334 X-BeenThere: freebsd-questions@freebsd.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: User questions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 02 Oct 2017 00:11:51 -0000 On Sun, 1 Oct 2017 17:25:31 -0600, The Doctor wrote: > Could be an attack. > > All right. > > As of this morning (3 p.m. UTC) my seconday FreeBSD 11.1 server > has been going intreface down then up and then unable to route. > > Rebooted this system 2 times today. > > > What should I bee looking for? Primarily the system's log files in /var/log: messages, auth.log, security. Also check the output of the periodic scripts (mailed to root or another user), do they contain hints to something that looks suspicious (SUID changes, system file modifications, etc.)? -- Polytropon Magdeburg, Germany Happy FreeBSD user since 4.0 Andra moi ennepe, Mousa, ...