From owner-freebsd-questions@FreeBSD.ORG Wed Jan 5 20:28:40 2005 Return-Path: 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 75E6316A4CE for ; Wed, 5 Jan 2005 20:28:40 +0000 (GMT) Received: from limicola.its.uu.se (limicola.its.uu.se [130.238.7.33]) by mx1.FreeBSD.org (Postfix) with ESMTP id B41E143D2F for ; Wed, 5 Jan 2005 20:28:39 +0000 (GMT) (envelope-from ante@Update.UU.SE) Received: by limicola.its.uu.se (Postfix, from userid 205) id 070954896; Wed, 5 Jan 2005 21:28:38 +0100 (MEZ) Received: from limicola.its.uu.se(127.0.0.1) by limicola.its.uu.se via virus-scan id s3922; Wed, 5 Jan 05 21:28:35 +0100 Received: from Psilocybe.Update.UU.SE (Psilocybe.Update.UU.SE [130.238.19.25]) by limicola.its.uu.se (Postfix) with ESMTP id 15F884881; Wed, 5 Jan 2005 21:28:35 +0100 (MEZ) Received: by Psilocybe.Update.UU.SE (Postfix, from userid 30086) id 0ECC138015; Wed, 5 Jan 2005 21:28:35 +0100 (CET) Received: from localhost (localhost [127.0.0.1]) by Psilocybe.Update.UU.SE (Postfix) with ESMTP id 0D9FA5C002; Wed, 5 Jan 2005 21:28:35 +0100 (CET) Date: Wed, 5 Jan 2005 21:28:35 +0100 (CET) From: Andreas Davour To: Charles Swiger In-Reply-To: <145FEF80-5F57-11D9-93F7-003065ABFD92@mac.com> Message-ID: References: <145FEF80-5F57-11D9-93F7-003065ABFD92@mac.com> MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII; format=flowed cc: freebsd-questions@freebsd.org Subject: Re: Is bpf a part of IPFW, or am I confused? X-BeenThere: freebsd-questions@freebsd.org X-Mailman-Version: 2.1.1 Precedence: list List-Id: User questions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 05 Jan 2005 20:28:40 -0000 On Wed, 5 Jan 2005, Charles Swiger wrote: > On Jan 5, 2005, at 3:09 PM, Andreas Davour wrote: >> I have searched the handbook and the manpages and not really understood the >> role of bpf. Is it supposed to be enabled when I use IPFW or is it another >> beast altogether, best left undisturbed? > > The BPF, or Berkeley Packet Filter, is really intended for use by userland > applications which want to perform network analysis and packet filtering. > IPFW and the other firewalls for FreeBSD are written as kernel modules and > thus deal with the network stack directly. > > The current DHCP implementation (ISC's dhcpd and dhclient programs) depends > on BPF to work, so I would be cautious about removing it from your kernel > unless you are sure you won't need it. Then I'd better not remove it from my kernel config, since I use dhcp for my network connection. Thanks for the warning! /andreas -- A: Because it fouls the order in which people normally read text. Q: Why is top-posting such a bad thing? A: Top-posting. Q: What is the most annoying thing on usenet and in e-mail?