|To:||"David S. Miller" <davem@xxxxxxxxxxxxx>|
|Subject:||Re: [PATCH] [RFC] Support for wccp version 1 and 2 in ip_gre.c|
|From:||Lincoln Dale <ltd@xxxxxxxxx>|
|Date:||Tue, 14 Sep 2004 18:48:20 +1000|
|Cc:||Paul P Komkoff Jr <i@xxxxxxxxxx>, i@xxxxxxxxxx, netdev@xxxxxxxxxxx, linux-kernel@xxxxxxxxxxxxxxx|
|References:||<20040913051706.GB26337@stingr.sgu.ru> <20040911194108.GS28258@stingr.sgu.ru> <firstname.lastname@example.org> <20040913051706.GB26337@stingr.sgu.ru>|
At 09:19 AM 14/09/2004, David S. Miller wrote:
> As you can see, I am applying it unconditionally when fits. For most > cases, this will be OK. > There can be situations when this is not wanted (for example, when > debugging something), so in general, tuning knob will be useful, but > I just don't know where to add it, maybe tunnel->parms.i_flags ...
the logic is correct, but it may make sense to call the appropriate netfilter hook again with the "unwrapped" GRE packet, as otherwise packets-inside-GRE represent a possible security hole where one can inject packets externally and bypass firewall rules.
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