From owner-freebsd-net@FreeBSD.ORG Thu Jun 4 07:31:13 2015 Return-Path: Delivered-To: freebsd-net@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [8.8.178.115]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by hub.freebsd.org (Postfix) with ESMTPS id 1D6654D3 for ; Thu, 4 Jun 2015 07:31:13 +0000 (UTC) (envelope-from guru@unixarea.de) Received: from ms-10.1blu.de (ms-10.1blu.de [178.254.4.101]) (using TLSv1 with cipher AES256-SHA (256/256 bits)) (Client did not present a certificate) by mx1.freebsd.org (Postfix) with ESMTPS id CF8001C25 for ; Thu, 4 Jun 2015 07:31:12 +0000 (UTC) (envelope-from guru@unixarea.de) Received: from [93.104.14.203] (helo=localhost.unixarea.de) by ms-10.1blu.de with esmtpsa (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.76) (envelope-from ) id 1Z0PcJ-0006Tz-P5 for freebsd-net@freebsd.org; Thu, 04 Jun 2015 09:31:08 +0200 Received: from localhost.my.domain (c720-r276659 [127.0.0.1]) by localhost.unixarea.de (8.14.9/8.14.9) with ESMTP id t547V5Sx002052 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=NO) for ; Thu, 4 Jun 2015 09:31:06 +0200 (CEST) (envelope-from guru@unixarea.de) Received: (from guru@localhost) by localhost.my.domain (8.14.9/8.14.9/Submit) id t547V50N002051 for freebsd-net@freebsd.org; Thu, 4 Jun 2015 09:31:05 +0200 (CEST) (envelope-from guru@unixarea.de) X-Authentication-Warning: localhost.my.domain: guru set sender to guru@unixarea.de using -f Date: Thu, 4 Jun 2015 09:31:00 +0200 From: Matthias Apitz To: freebsd-net@freebsd.org Subject: unknown UDP caused by dhclient Message-ID: <20150604073100.GA2012@c720-r276659> Reply-To: Matthias Apitz Mail-Followup-To: Matthias Apitz , freebsd-net@freebsd.org MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline Content-Transfer-Encoding: 8bit X-Operating-System: FreeBSD 11.0-CURRENT r269739 (i386) User-Agent: Mutt/1.5.23 (2014-03-12) X-Con-Id: 51246 X-Con-U: 0-guru X-Originating-IP: 93.104.14.203 X-BeenThere: freebsd-net@freebsd.org X-Mailman-Version: 2.1.20 Precedence: list List-Id: Networking and TCP/IP with FreeBSD List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 04 Jun 2015 07:31:13 -0000 Hello, I'm seeing in my firewall log unknow UDP traffic which is caused by the running dhclient: Jun 3 21:57:02 c720-r276659 dhclient[2601]: send_packet: Network is unreachable Jun 3 21:57:02 c720-r276659 ipmon[2368]: 21:57:02.751350 ue0 @0:82 b 10.42.0.83,68 -> 10.42.0.1,67 PR udp len 20 328 OUT Jun 3 21:58:38 c720-r276659 dhclient[2601]: send_packet: Network is unreachable Jun 3 21:58:38 c720-r276659 ipmon[2368]: 21:58:38.753118 ue0 @0:82 b 10.42.0.83,68 -> 10.42.0.1,67 PR udp len 20 328 OUT What is my dhclient asking from the router 10.42.0.1? Should I open the ipfilter for this? The system is r276659. Thanks matthias -- Matthias Apitz, guru@unixarea.de, http://www.unixarea.de/ +49-170-4527211 +49-176-38902045 "Wenn der Mensch von den Umständen gebildet wird, so muß man die Umstände menschlich bilden." "Si el hombre es formado por las circunstancias entonces es necesario formar humanamente las circunstancias", Karl Marx in Die heilige Familie / La sagrada familia (MEW 2, 138)