From owner-freebsd-net@FreeBSD.ORG Wed Oct 10 12:06:11 2012 Return-Path: Delivered-To: freebsd-net@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [69.147.83.52]) by hub.freebsd.org (Postfix) with ESMTP id 5ACAA198 for ; Wed, 10 Oct 2012 12:06:11 +0000 (UTC) (envelope-from krzysiek@airnet.opole.pl) Received: from base.airnet.opole.pl (ns2.airmax.pl [176.111.128.3]) by mx1.freebsd.org (Postfix) with ESMTP id 0A2F58FC19 for ; Wed, 10 Oct 2012 12:06:10 +0000 (UTC) Received: from localhost (localhost [127.0.0.1]) by base.airnet.opole.pl (Postfix) with ESMTP id 7173B7FF02B; Wed, 10 Oct 2012 14:06:05 +0200 (CEST) Received: from base.airnet.opole.pl ([127.0.0.1]) by localhost (mail.airnet.opole.pl [127.0.0.1]) (maiad, port 10024) with ESMTP id 41678-07; Wed, 10 Oct 2012 14:06:05 +0200 (CEST) Received: from [10.10.11.223] (unknown [176.111.138.12]) (using TLSv1 with cipher DHE-RSA-CAMELLIA256-SHA (256/256 bits)) (No client certificate requested) (Authenticated sender: krzysiek@airnet.opole.pl) by base.airnet.opole.pl (Postfix) with ESMTPSA id 424A17FF020; Wed, 10 Oct 2012 14:06:05 +0200 (CEST) Message-ID: <507564AB.7090204@airnet.opole.pl> Date: Wed, 10 Oct 2012 14:06:03 +0200 From: Krzysztof Barcikowski User-Agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:15.0) Gecko/20120907 Thunderbird/15.0.1 MIME-Version: 1.0 To: Dominic Blais Subject: Re: Default route "random" gateway modification bug References: <2DE61B0869B7484997BCA012845482C7EBE8E2819F@WIN2008.Domnt.abi.ca> In-Reply-To: <2DE61B0869B7484997BCA012845482C7EBE8E2819F@WIN2008.Domnt.abi.ca> Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Cc: "freebsd-net@freebsd.org" X-BeenThere: freebsd-net@freebsd.org X-Mailman-Version: 2.1.14 Precedence: list List-Id: Networking and TCP/IP with FreeBSD List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 10 Oct 2012 12:06:11 -0000 W dniu 2012-10-10 13:57, Dominic Blais pisze: > Hi (sorry, I clicked send too fast ;) ), > > I had to change the server of my customer who have this bug because we wanted to put 2 redundant servers with carp... I removed the old server and replaced it with 2 brand new ones. The old one was an HP ML115 and the new ones are Lenovo TS120. The new servers are the same model (HP ML115). > > I used the same software: > > - FreeBSD 9.0 > - MPD 5.6 > - IPFW (pipes only + single pass all rule) > - PF ruleset for filter and NAT. > > And only added: > kldload if_carp.ko > > The problem just happened this last night with that configuration so I may say it should be replicable if someone did use the same FreeBSD version with ipfw for pipes and pf for rules/nat. We still don't know what is exactly messing up with the default gateway but we know that it is something with the mix of FreeBSD 9, IPFW for pipes and PF for NAT. You must add some traffic to it to make it happen since it looks like it's using an IP of a host the users communicated with to replace the gateway. I often see, but not only, Microsoft owned IP as my default gateway when it happens. > > Hi I often see DNS server IP's used in my network, but not only. Best regards! Krzysztof Barcikowski