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 From:  "Chris Buechler" <cbuechler at gmail dot com>
 To:  m0n0wall at lists dot m0n0 dot ch
 Subject:  Re: [m0n0wall] CPU at 100% with IPSec Tunnel
 Date:  Fri, 24 Oct 2008 17:42:13 -0400
On Fri, Oct 24, 2008 at 4:59 AM, Vincent Hämmerli - EXES sàrl
<vhaemmerli at exes dot ch> wrote:
> Hello,
> I'm using m0n0wall version 1.3b15 on platform PC Engines ALIX and I have one
> IPSec Tunnel
> After some hours, the CPU will goes to 100%. If I stop the IPSec Tunnel the
> CPU utilisation goes back to 1  5%
> And after some time it will use 100% again.
> In the process list we can see the racoon process (used for IPSec tunnel) is
> using a lot of CPU.
> Has someone had the same problem ?

Only if pushing more VPN throughput than the CPU can handle. With an
ALIX, that should be in excess of 10 Mb (depending on encryption
protocol), which would be difficult to achieve in most environments,
but is what I would look at first.