From owner-freebsd-bugs@FreeBSD.ORG  Sun Feb  6 17:50:17 2005
Return-Path: <owner-freebsd-bugs@FreeBSD.ORG>
Delivered-To: freebsd-bugs@hub.freebsd.org
Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125])
	by hub.freebsd.org (Postfix) with ESMTP id 5226C16A4CE
	for <freebsd-bugs@hub.freebsd.org>;
	Sun,  6 Feb 2005 17:50:17 +0000 (GMT)
Received: from freefall.freebsd.org (freefall.freebsd.org [216.136.204.21])
	by mx1.FreeBSD.org (Postfix) with ESMTP id 3606443D1F
	for <freebsd-bugs@hub.freebsd.org>;
	Sun,  6 Feb 2005 17:50:17 +0000 (GMT)
	(envelope-from gnats@FreeBSD.org)
Received: from freefall.freebsd.org (gnats@localhost [127.0.0.1])
	by freefall.freebsd.org (8.13.1/8.13.1) with ESMTP id j16HoHlf008949
	for <freebsd-bugs@freefall.freebsd.org>; Sun, 6 Feb 2005 17:50:17 GMT
	(envelope-from gnats@freefall.freebsd.org)
Received: (from gnats@localhost)
	by freefall.freebsd.org (8.13.1/8.13.1/Submit) id j16HoHgA008948;
	Sun, 6 Feb 2005 17:50:17 GMT
	(envelope-from gnats)
Date: Sun, 6 Feb 2005 17:50:17 GMT
Message-Id: <200502061750.j16HoHgA008948@freefall.freebsd.org>
To: freebsd-bugs@FreeBSD.org
From: David Malone <dwmalone@maths.tcd.ie>
Subject: Re: kern/76966: udp/520 reply packets when routed is not running
X-BeenThere: freebsd-bugs@freebsd.org
X-Mailman-Version: 2.1.1
Precedence: list
Reply-To: David Malone <dwmalone@maths.tcd.ie>
List-Id: Bug reports <freebsd-bugs.freebsd.org>
List-Unsubscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-bugs>,
	<mailto:freebsd-bugs-request@freebsd.org?subject=unsubscribe>
List-Archive: <http://lists.freebsd.org/pipermail/freebsd-bugs>
List-Post: <mailto:freebsd-bugs@freebsd.org>
List-Help: <mailto:freebsd-bugs-request@freebsd.org?subject=help>
List-Subscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-bugs>,
	<mailto:freebsd-bugs-request@freebsd.org?subject=subscribe>
X-List-Received-Date: Sun, 06 Feb 2005 17:50:17 -0000

The following reply was made to PR kern/76966; it has been noted by GNATS.

From: David Malone <dwmalone@maths.tcd.ie>
To: Emil Cazamir <emil.cazamir@galati.rdsnet.ro>
Cc: FreeBSD-gnats-submit@FreeBSD.org
Subject: Re: kern/76966: udp/520 reply packets when routed is not running
Date: Sun, 6 Feb 2005 17:41:15 +0000

 On Tue, Feb 01, 2005 at 05:35:28PM +0200, Emil Cazamir wrote:
 > >Description:
 > 	The FreeBSD kernel seems to respond to udp/520 packets even when
 > there is no such daemon running.
 
 There's no code in the FreeBSD kernel for doing this, however I think
 I know what is going on...
 
 > 17:03:32.185977 0:f:3d:47:8b:de ff:ff:ff:ff:ff:ff 0800 60: 192.168.0.10.520
 > > 192.168.0.255.520:  RIPv1-resp [items 0]: (DF)
 > 17:03:32.186153 0:0:0:0:0:2 0:0:0:0:0:1 0800 60: 192.168.1.33.520 >
 > 192.168.0.255.520:  RIPv1-resp [items 0]: (DF)
 
 Your FreeBSD maching gets a packet for 192.168.0.255 - I suspect
 you have the netmask on your FreeBSD machine set incorrectly so it
 does not consider this a broadcast address. Consequently, it probably
 considers this a misdirected packet and so sends an ICMP redirect
 and then forwards the packet, in this case to the default router.
 
 I'm not sure why the source address on the packet has changed -
 that bit seems a bit odd.
 
 	David.