From owner-freebsd-current@FreeBSD.ORG Thu May 6 17:18:50 2004 Return-Path: Delivered-To: freebsd-current@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id 84F5716A4CE for ; Thu, 6 May 2004 17:18:50 -0700 (PDT) Received: from mailtoaster1.pipeline.ch (mailtoaster1.pipeline.ch [62.48.0.70]) by mx1.FreeBSD.org (Postfix) with ESMTP id A609B43D54 for ; Thu, 6 May 2004 17:18:49 -0700 (PDT) (envelope-from andre@freebsd.org) Received: (qmail 92198 invoked from network); 7 May 2004 00:18:47 -0000 Received: from unknown (HELO freebsd.org) ([62.48.0.54]) (envelope-sender ) by mailtoaster1.pipeline.ch (qmail-ldap-1.03) with SMTP for ; 7 May 2004 00:18:47 -0000 Message-ID: <409AD5E6.34E3D191@freebsd.org> Date: Fri, 07 May 2004 02:18:46 +0200 From: Andre Oppermann X-Mailer: Mozilla 4.8 [en] (Windows NT 5.0; U) X-Accept-Language: en MIME-Version: 1.0 To: Julian Elischer References: Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit cc: Sam Leffler cc: freebsd-current@freebsd.org cc: freebsd-net@freebsd.org Subject: Re: Default behaviour of IP Options processing X-BeenThere: freebsd-current@freebsd.org X-Mailman-Version: 2.1.1 Precedence: list List-Id: Discussions about the use of FreeBSD-current List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 07 May 2004 00:18:50 -0000 Julian Elischer wrote: > > On Thu, 6 May 2004, Sam Leffler wrote: > > > > > For fine-grained selection packet filtering is the better solution. This is a > > simple, much lighterweight, mechanism that doesn't require touching every > > packet. > > I would only do the tests if the packet HAD an ip option.. > > either way I'm not going to scream about it.. > just my thoughts on the matter.. On a side note: Setting this sysctl to ignore does not prevent the host from generating or receiving packets with IP options on sockets. Only from adding to them when they come by. Rejecting such packets does not prevent you from sending them but certainly does from receiving them. -- Andre