From mboxrd@z Thu Jan  1 00:00:00 1970
From: Pascal Hambourg <pascal.mail@plouf.fr.eu.org>
Subject: Re: Configuring netfilter for pptp connections
Date: Fri, 26 May 2006 15:06:31 +0200
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Hello,

Sietse van Zanen a =E9crit :
> For PPTP/GRE to work you need to add two rules:
> 1 for the PPTP connection (TCP Port 1723) and 1 for the GRE Protocol (I=
P proto 47).
> =20
> If you want your machine to connect to a PPTP server on the Internet,
> allow PPTP OUTBOUND towards that server and GRE INBOUND from that serve=
r.
> If you want a client on the Internet connect to your PPTP server,
> allow both PPTP and GRE INBOUND to your server.

According to this, neither the client or the server are allowed to=20
establish an outbound GRE connection. How can this work ?