From: Patrick McHardy <kaber@trash.net>
To: Ming-Ching Tiew <mingching.tiew@redtone.com>
Cc: netfilter-devel@vger.kernel.org, tproxy@lists.balabit.hu
Subject: Re: Tproxy4, fwmark and netfilter route_me_harder
Date: Sun, 20 Jan 2008 16:31:11 +0100 [thread overview]
Message-ID: <4793693F.4080604@trash.net> (raw)
In-Reply-To: <007001c858b0$9f570db0$8119fea9@MingChing>
Ming-Ching Tiew wrote:
> I sort of just forward this to netfilter-devel.
>
> For those who in netfilter-devel but not in tproxy mail list, a little
> background here :-
>
> I discovered after applying the tproxy4 patch which allows one to spoof
> originating traffic with a foreign IP address ( for the purpose of doing
> transparent proxy ) that after doing it, traffics with foreign IP will
> not leave the system if there is a FWMARK in the mangle table OUTPUT
> chain. Any MARK will screw up the routing.
>
> And the patch above seems to be able to get the packets out of the machine
> again.
>
> So the motivation here perhaps someone here could throw some light as to
> how this situation is best handled.
IIRC the current TPROXY patches use a flag in the dst_entry
to indicate that the source address is non-local. So
ip_route_me_harder should probably check that flag and
use routing for foreign addresses for that case.
prev parent reply other threads:[~2008-01-20 15:32 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <2eda2a0a0801101228h230e9d56pd850df9e86a03546@mail.gmail.com>
[not found] ` <47878108.50108@redtone.com>
[not found] ` <2eda2a0a0801101928l650804aclbdfd101779f45295@mail.gmail.com>
[not found] ` <007901c85403$6f690dd0$8119fea9@MingChing>
[not found] ` <47873A67.2010406@balabit.hu>
[not found] ` <47878F45.4040201@redtone.com>
[not found] ` <47879DC5.3050605@balabit.hu>
[not found] ` <47883860.8040303@redtone.com>
[not found] ` <20080115114237.GA7265@sch.bme.hu>
[not found] ` <478F724F.8010900@redtone.com>
2008-01-17 2:28 ` Tproxy4, fwmark and netfilter route_me_harder Ming-Ching Tiew
2008-01-20 15:31 ` Patrick McHardy [this message]
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