From owner-freebsd-questions Tue Feb 16 01:26:58 1999 Return-Path: Received: (from majordom@localhost) by hub.freebsd.org (8.8.8/8.8.8) id BAA26109 for freebsd-questions-outgoing; Tue, 16 Feb 1999 01:26:58 -0800 (PST) (envelope-from owner-freebsd-questions@FreeBSD.ORG) Received: from mel.alcatel.fr (mel.alcatel.fr [212.208.74.132]) by hub.freebsd.org (8.8.8/8.8.8) with ESMTP id BAA26104 for ; Tue, 16 Feb 1999 01:26:48 -0800 (PST) (envelope-from Thierry.Herbelot@alcatel.fr) Received: from aifhs2.alcatel.fr (mailhub.alcatel.fr [155.132.180.80]) by mel.alcatel.fr (ALCANET/SMTP) with ESMTP id KAA20530 for ; Tue, 16 Feb 1999 10:25:57 +0100 Received: from lune.telspace.alcatel.fr (lune.telspace.alcatel.fr [155.132.144.65]) by aifhs2.alcatel.fr (ALCANET/SMTP2) with ESMTP id KAA13332 for ; Tue, 16 Feb 1999 10:23:26 +0100 (MET) Received: from telss1.telspace.alcatel.fr (telss1.telspace.alcatel.fr [155.132.51.4]) by lune.telspace.alcatel.fr (8.9.1a/8.9.1) with SMTP id KAA03327 for ; Tue, 16 Feb 1999 10:12:14 +0100 (MET) Received: from telspace.alcatel.fr (nairobi.telspace.alcatel.fr) by telss1.telspace.alcatel.fr (4.1/SMI-4.1) id AA01407; Tue, 16 Feb 99 10:20:50 +0100 Message-Id: <36C9399B.48CCDAC7@telspace.alcatel.fr> Date: Tue, 16 Feb 1999 10:25:47 +0100 From: HERBELOT Thierry Organization: Alcatel Telspace X-Mailer: Mozilla 4.5 [en] (X11; I; SunOS 5.5.1 sun4m) X-Accept-Language: en Mime-Version: 1.0 To: questions Subject: Re: DHCP weirdness ? Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit Sender: owner-freebsd-questions@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.ORG Chris Peltier wrote: > > > From time to time, the IP address which is allocated to my machine > > changes subnets (it goes from the xxx.yyy.18.zzz network to the > > xxx.yyy.21.www). This seems to disturb wildly the Net connection (the > > dhcp client complains about changing subnets, and often, I'm > > obliged to > > reboot to use the network). > > > > Atfer this (rather long) introduction, here is my question : > > is it a good engineering practice to have the DHCP server > > change subnets > > in its response even though the machine does not change > > physical network > > ? > > > > (the rfc-2131 on DHCP specifically allows the subnet change - on p.27, > > but I can't find a good reason to do so) > > The Cable providers do this to prevent customer from running > servers on their network. They don't want to block inbound > syn connections so instead they change IPs. > > -Chris I didn't write what I meant : of course, this change of subnet is designed to prevent customer servers. The real question was : is the isc-dhcp client more robust in the case of such changes ? (last night, my machine survived a change of subnet, that is I didn't have to reboot it this morning even if the IP subnet changed during the night) ( other questions would be : have other ppl on the list had the same problem ? what is the policy of @home / Road-Runner ? ) TfH PS : BTW, the DHCP client for theMac also suffers when changing subnets To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-questions" in the body of the message