[Snort-devel] Re: Status alert
Dirk_Geschke at ...802...
Tue Feb 24 05:55:06 EST 2004
> Not really. In my example you check the entire chain from the sensor to
> the receiving end, not just that the process is running.
> * Snort receives SIGUSR2 and generate a status alert
> * The alert is sent using the prelude output plugin
> * A prelude manager in country A receive the alert and retransmits it
> * A prelude manager in country B receive the alert and retransmits it
> * The prelude manager in my country receive the alert
> * The prelude alert is mangled into a customized idmef alert
> * The idmef alert is logged to our NMS
> Every time such a status alert is received, it's an indication that
> everything is all right.
> Compare this feature with the "--MARK--" message sent by syslogd. It
> is nice to have when backtracking a system failure.
> A nice side effect is that if you fill the alert payload with
> snort statistics such as the number of dropped packets, you
> automaticly have a centralized historical archive of the snort's
> performance without having to use the Monitor Performance preprocessor.
> The Monitor Performance preprocessor can only log to the console or to a
> file on the sensor. This is a nice feature, but in my case the sensors are
> located in different countries and I don't want to build a new system that
> collects files from the sensors to a central place. I already have a nice
> working redundant solution (prelude).
> Why not simply reuse the existing solution for sending statistics and
> performance data?
why do you want to use a signal? Simply create a special rule and
trigger an alert via the network. Then you have tested the whole
It should be easy to inject a special configured network packet
which can't be send in via the "normal" traffic. All you need is
to verify that this packet raises an alert and maybe find it in
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