From owner-freebsd-net@FreeBSD.ORG Fri Apr 18 15:41:42 2003 Return-Path: Delivered-To: freebsd-net@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id EBA8437B401 for ; Fri, 18 Apr 2003 15:41:42 -0700 (PDT) Received: from lariat.org (lariat.org [63.229.157.2]) by mx1.FreeBSD.org (Postfix) with ESMTP id 0F17A43FAF for ; Fri, 18 Apr 2003 15:41:42 -0700 (PDT) (envelope-from brett@lariat.org) Received: from mustang.lariat.org (IDENT:ppp1000.lariat.org@lariat.org [63.229.157.2]) by lariat.org (8.9.3/8.9.3) with ESMTP id QAA08153; Fri, 18 Apr 2003 16:41:24 -0600 (MDT) X-message-flag: Warning! Use of Microsoft Outlook renders your system susceptible to Internet worms. Message-Id: <4.3.2.7.2.20030418163428.02bf6480@localhost> X-Sender: brett@localhost X-Mailer: QUALCOMM Windows Eudora Version 4.3.2 Date: Fri, 18 Apr 2003 16:41:19 -0600 To: Chris Luke From: Brett Glass In-Reply-To: <20030418222209.GA39709@flix.net> References: <4.3.2.7.2.20030418111623.02819bd0@localhost> <0AF1BBDF1218F14E9B4CCE414744E70F07DE93@exchange.wanglobal.net> <4.3.2.7.2.20030418111623.02819bd0@localhost> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" cc: freebsd-net@freebsd.org Subject: Re: Userland PPP/PPTP tunneling problem X-BeenThere: freebsd-net@freebsd.org X-Mailman-Version: 2.1.1 Precedence: list List-Id: Networking and TCP/IP with FreeBSD List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 18 Apr 2003 22:41:43 -0000 At 04:22 PM 4/18/2003, Chris Luke wrote: >Tunnels are point-to-point connections. Each end of the link >has an address, even if inherited from another interface, >and these addresses are either known in advance, or exchanged or >negotiated by a higher-level protocol, such as the negotiation >stuff in PPP. Thus the address of the far end is known, and is >entered as a route into the forwarding table. Even assuming that you don't need ARP (and SOMEONE has to do ARP if you're going to get to other addresses on the LAN you're tunneling into), there are many applications that do need to send out a broadcast. HP JetDirect and LapLink are two which I know these folks to be using. The broadcast address should be the correct one for the LAN into which you're tunneling, or these products won't work. --Brett