From owner-freebsd-net Wed Apr 19 14:18: 8 2000 Delivered-To: freebsd-net@freebsd.org Received: from if.scientech.com (eaglerock.if.scientech.com [198.60.85.3]) by hub.freebsd.org (Postfix) with ESMTP id 8182037B68A; Wed, 19 Apr 2000 14:18:05 -0700 (PDT) (envelope-from cmott@scientech.com) Received: from if.scientech.com (IDENT:cmott@if.scientech.com [10.128.1.6] (may be forged)) by if.scientech.com (8.9.3/8.9.3) with ESMTP id PAA18701; Wed, 19 Apr 2000 15:18:02 -0600 Date: Wed, 19 Apr 2000 15:18:02 -0600 (MDT) From: Charles Mott To: Archie Cobbs Cc: Ruslan Ermilov , julian@elischer.org, brian@Awfulhak.org, ari@suutari.iki.fi, perhaps@yes.no, net@FreeBSD.ORG, Erik Salander Subject: Re: Improved PPTP support for libalias(3) In-Reply-To: <200004191819.LAA27198@bubba.whistle.com> Message-ID: MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: owner-freebsd-net@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.org > I'm not that familiar with the libalias code (erik@whistle.com is > more familiar), but am familiar with PPTP. Are you swizzling the > TCP stream (port 1723) at all? If not, then it's probably not going > to work .. or at least, not when two clients use the same Call ID. > > PPTP is like active mode FTP in that the Call ID (FTP -> port #) is > embedded in the TCP stream and must be swizzled. Unlike FTP however, > the TCP stream won't shrink or expand. It seems like the PPTP server address and call ID would provide enough information to correctly rewrite packets (i.e. a given server will not have duplicate call ID's). However, you are also indicating that the the control stream must be modified. To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-net" in the body of the message