From owner-freebsd-questions@FreeBSD.ORG Mon Jun 6 21:59:37 2005 Return-Path: X-Original-To: freebsd-questions@freebsd.org Delivered-To: freebsd-questions@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id 48AB416A41C for ; Mon, 6 Jun 2005 21:59:37 +0000 (GMT) (envelope-from cswiger@mac.com) Received: from smtpout.mac.com (smtpout.mac.com [17.250.248.45]) by mx1.FreeBSD.org (Postfix) with ESMTP id 1FA2D43D1F for ; Mon, 6 Jun 2005 21:59:36 +0000 (GMT) (envelope-from cswiger@mac.com) Received: from mac.com (smtpin07-en2 [10.13.10.152]) by smtpout.mac.com (Xserve/8.12.11/smtpout11/MantshX 4.0) with ESMTP id j56LxZMk020532; Mon, 6 Jun 2005 14:59:35 -0700 (PDT) Received: from [10.1.1.153] (nfw2.codefab.com [199.103.21.225] (may be forged)) (authenticated bits=0) by mac.com (Xserve/smtpin07/MantshX 4.0) with ESMTP id j56LxY52007808; Mon, 6 Jun 2005 14:59:35 -0700 (PDT) In-Reply-To: <21064.66.201.44.146.1118079993.squirrel@mailhenge.com> References: <21064.66.201.44.146.1118079993.squirrel@mailhenge.com> Mime-Version: 1.0 (Apple Message framework v730) X-Priority: 3 (Normal) Content-Type: text/plain; charset=US-ASCII; delsp=yes; format=flowed Message-Id: Content-Transfer-Encoding: 7bit From: Charles Swiger Date: Mon, 6 Jun 2005 17:59:37 -0400 To: ben@stonehenge-net.com X-Mailer: Apple Mail (2.730) Cc: freebsd-questions@freebsd.org Subject: Re: strange network behaviour X-BeenThere: freebsd-questions@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: User questions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 06 Jun 2005 21:59:37 -0000 On Jun 6, 2005, at 1:46 PM, ben@stonehenge-net.com wrote: > on Friday i set up 4 old celeron boxes as DNS servers for a > client. after > about 5 minutes, their ability to reach the network vanishes... > they can't > ping their router, and inbound network traffic vanishes. rebooting > fixes > the problem... for another ~ 5 min. > > the only things running are chrooted bind, postfix, and webmin. > ipfw is > on, with firewall_type="open". i've also tried it with ipfw disabled. Someone who mentioned ARP may be right, judging by the timeout, but perhaps not if you've turned IPFW off entirely. Five minutes is also about right if you've got dynamic routing or a second DHCP server lurking enabled somewhere and is sending out a bad route. Are you sure the router is OK? -- -Chuck