[Oisf-users] Buffered alert ?

Anoop Saldanha anoopsaldanha at gmail.com
Fri Apr 6 08:08:05 UTC 2012

On Fri, Apr 6, 2012 at 1:33 PM, Victor Julien <victor at inliniac.net> wrote:
> On 04/06/2012 09:59 AM, Michel SABORDE wrote:
>> Hello everyone,
>> I'm facing a strange problem.
>> Sometimes alerts are "buffered" and only wrote in fast.log when i stop
>> suricata.
>> It is painful because to be sure whether or not an alert was triggered,
>> i have to restart suricata at each test.
>> Did anyone encounter the same problem ?
> It's likely because the alert is only triggered when the flow times out.
> This can happen when Suricata missed the TCP FIN or RST packets. You can
> try to lower the flow timeout settings in your yaml. You should see the
> alerts coming in sooner then.
> --
> ---------------------------------------------
> Victor Julien
> http://www.inliniac.net/
> PGP: http://www.inliniac.net/victorjulien.asc
> ---------------------------------------------
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Coming to think of it, for really long streams, our flow manager can
send a pseudo packet every 'x' seconds to trigger raw reassembly and
inspection.  This should keep the alerts coming.

Anoop Saldanha

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