From owner-freebsd-questions@freebsd.org Mon Oct 3 13:17:04 2016 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 0EEA4AC6455 for ; Mon, 3 Oct 2016 13:17:04 +0000 (UTC) (envelope-from freebsd@edvax.de) Received: from mx02.qsc.de (mx02.qsc.de [213.148.130.14]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (Client did not present a certificate) by mx1.freebsd.org (Postfix) with ESMTPS id CC10F5F4 for ; Mon, 3 Oct 2016 13:17:03 +0000 (UTC) (envelope-from freebsd@edvax.de) Received: from r56.edvax.de (port-92-195-151-121.dynamic.qsc.de [92.195.151.121]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (No client certificate requested) by mx02.qsc.de (Postfix) with ESMTPS id 18B60278A7; Mon, 3 Oct 2016 15:16:53 +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 u93DGrsg002179; Mon, 3 Oct 2016 15:16:53 +0200 (CEST) (envelope-from freebsd@edvax.de) Date: Mon, 3 Oct 2016 15:16:53 +0200 From: Polytropon To: Mark Tinka Cc: freebsd-questions@freebsd.org Subject: Re: UDP Traceroute on FreeBSD Message-Id: <20161003151653.bc9887c8.freebsd@edvax.de> In-Reply-To: <76dab24c-6c16-4935-779a-a9ef65df8d18@seacom.mu> References: <76dab24c-6c16-4935-779a-a9ef65df8d18@seacom.mu> 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-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, 03 Oct 2016 13:17:04 -0000 On Mon, 3 Oct 2016 14:52:38 +0200, Mark Tinka wrote: > Can anyone tell me whether FreeBSD is able to respond to traceroute > packets transported over UDP? That could be possible. You can verify it by instructing the traceroute program to issue UDP packets, but it will listen for an ICMP answer, if I remember that mechanism correctly. Then inspect the packets with Wireshark. See "man traceroute" for details. Consider asking the question on the freebsd-hackers@ or freebsd-net@ mailing lists. The answer to your question is located somewhere in the system's network stack. ;-) -- Polytropon Magdeburg, Germany Happy FreeBSD user since 4.0 Andra moi ennepe, Mousa, ...