From owner-freebsd-questions@FreeBSD.ORG Fri Jul 15 14:17:58 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 87CC716A41C for ; Fri, 15 Jul 2005 14:17:58 +0000 (GMT) (envelope-from ean@hedron.org) Received: from prosporo.hedron.org (hedron.org [66.11.182.60]) by mx1.FreeBSD.org (Postfix) with ESMTP id 225BD43D49 for ; Fri, 15 Jul 2005 14:17:58 +0000 (GMT) (envelope-from ean@hedron.org) Received: from localhost.hedron.org (localhost.hedron.org [127.0.0.1]) by prosporo.hedron.org (Postfix) with ESMTP id D1A15C1AC; Fri, 15 Jul 2005 10:18:10 -0400 (EDT) From: Ean Kingston To: freebsd-questions@freebsd.org Date: Fri, 15 Jul 2005 10:18:09 -0400 User-Agent: KMail/1.8 References: In-Reply-To: X-Face: W{mkf[fd1042ubL1FZ(CABIMzn~rdu<:SW\^LF_RB' Cc: stephanweaver@hotmail.com Subject: Re: DHCP Server Offline. 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: Fri, 15 Jul 2005 14:17:58 -0000 On July 15, 2005 10:11 am, Stephan Weaver wrote: > Hello folks, > > I have a Stand Alone FreeBSD Firewall / Nat / Dhcp Server. > Everything seems to work fine, up until this morning. > Users seem to complain they could not get on the network anymore. > > Further investigation revealed the dhcp server could not be contacted. > Further more, only some of the users were online. > I am guessing that these clients who were online had an ip address from the > dhcp server at a previous time and the lease didnt expire as yet. > And users who were not online, the lease expired and attempted to contact > the dhcp server and failed. > > I Would appreciate any help or suggestions. Set the lease expire time to at least 5 days (7 to 10 is better) and the renewal time to between 4 and 12 hours. Then setup a dhcp monitoring process that will alert you if it fails to get an address or renewal. Make sure you have more addresses available than you ever expect to give out. I go with 50% more. I've known some admins that want at least double. > Like what to do in the future incase this happens again. Setup 2 dhcp servers on the network. If one fails, the other will hopefully continue to serve addresses. Monitor this one as well. > I Would like to find out what had happened. Start reading logs. > The last thing that i had done to the server was setup, configure and > install 'ntop'; > dont know if this would cause a problem. > > Thank you in advance. > Stephan Weaver > > P.S. Please reply to my Directly at @ > stephanweaver@hotmail.com -- Ean Kingston E-Mail: ean AT hedron DOT org URL: http://www.hedron.org/ I am currently looking for work. If you need competent system/network administration please feel free to contact me directly.