From owner-freebsd-net  Sun Jan 14 15:49:19 2001
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From: Archie Cobbs <archie@dellroad.org>
Message-Id: <200101142349.PAA03773@curve.dellroad.org>
Subject: Re: mpd problem / multiple pptp clients behind one nat
In-Reply-To: <20010113010329.5614.qmail@cube.gelatinous.com> "from danh@gelatinous.com
 at Jan 13, 2001 01:03:29 am"
To: danh@gelatinous.com
Date: Sun, 14 Jan 2001 15:49:01 -0800 (PST)
Cc: net@FreeBSD.ORG
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danh@gelatinous.com writes:
> Let's say my network is set up this way:
> 
> client1---------------\
> client2                \
> client3                freebsd gw + natd --- internet -- freebsd machine
>                                                          running 
>                                                          mpd-netgraph
> client4               /   
> client5 etc...-------/

You forgot that the rest of the world uses 8 character tabs instead
of four.. ASCII art repaired above compliments of "expand -4" :-)

> I want more than one of the client machines to connect to a vpn,
> with mpd-netgraph running on the vpn server.
> 
> This works fine for just one client, but if more than one client
> tries to connect, it fails or the client already connected
> loses connection. 

This is a known issue.. from "man libalias":

BUGS
     PPTP aliasing does not work when more than one internal client connects
     to the same external server at the same time, because PPTP requires a
     single TCP control connection to be established between any two IP ad-
     dresses.

Fixing it would require a non-trivial amount of work in libalias.

-Archie

___________________________________________________________________________
Archie Cobbs   *   Whistle Communications, Inc.  *   http://www.whistle.com


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