netdev - Re: VPN traffic leaks in IPv6/IPv4 dual-stack networks/hosts

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Message-ID: <alpine.LNX.2.01.1211282203310.11510@nerf07.vanv.qr>
Date:	Wed, 28 Nov 2012 22:37:05 +0100 (CET)
From:	Jan Engelhardt <jengelh@...i.de>
To:	Fernando Gont <fernando@...t.com.ar>
cc:	netdev <netdev@...r.kernel.org>
Subject: Re: VPN traffic leaks in IPv6/IPv4 dual-stack networks/hosts

On Wednesday 2012-11-28 21:14, Fernando Gont wrote:

>On 11/28/2012 05:06 PM, Jan Engelhardt wrote:
>>> If the VPN is supposed to secure all traffic, and the VPN just fails to
>>> support v6, then for me, it's questionable to have your traffic leak out
>>> the VPN just because of that lack of IPv6 support.
>> 
>> Well, what I am saying is that a server may not
>> be conveying "all", but only "0.0.0.0/0"[0/0].
>
>In such scenarios, doing nothing about IPv6 would be an oversight/error,

Without additional input from the user, e.g. by means of a config 
setting, the software itself cannot distinguish between an 
oversight/error and a deliberate configuration.
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