[Snort-users] Alerting in near-real-time

Paul Halliday paul.halliday at ...11827...
Thu May 10 10:48:49 EDT 2007


On 5/10/07, David.Ryan at ...14057... <David.Ryan at ...14057...> wrote:
> Thanks to all on the list for their help to date.
> I am still trying to get my head around something which I still can't
> understand in the overall snort model and I'm hoping someone can set me
> straight on what I'm missing (or what I'm assuming incorrectly).  I may have
> asked this to the list before, but I can't find it.  Apologies if I'm asking
> the same question again.
> What I have got so far . . .  snort sniffs packets, matches those packets
> against rules and can log the results via a variety of output plugins to
> various repositories.  It can log directly to a variety of databases, but
> from an optimisation point of view it is better to use unified output, pass
> that to something like barnyard and have *it* log to the database.  Net
> result is that events are logged in the database.  This appears to be the
> end of snorts involvement in the process from what I can see.
> With the data now in the database something else needs to process it further
> if any value is to come out of the data.  There are various apps such as
> BASE, snortnotify, snortsnarf, etc .. . . which will either summarise the
> data and mail it out or else present it via a webpage for analysis.  The
> problem I'm thinking of is that this is fine for trending or where there is
> someone looking at the data to review recent traffic, but I don't see how
> this can provide any sort of near-real-time alerting.
> Say for example I am happy to look through reports every morning at 0900 to
> see what happened yesterday, but I *really* *really* want to get an SNMP or
> SMTP alert when rule # 3423 is triggered or the string "bad stuff" is
> spotted.  What do people use for this type of scenario ?  I understand that
> it would probably involve running a query against the database every X
> minutes and acting on the results of the query, but I can't understand how
> there aren't a set of apps out there (or at least ones I can find) that do
> this type of thing as I would have thought it was a common requirement.
> David
> =================================
>  David Ryan
>  IT Security Engineer, Global IT Security
>  Quintiles, Global IT - Infrastructure, QDUB
>  david.ryan at ...14057...
>  v:  +353-1-819-5186, GMT+0
>  m: +353-87-124-9108
>  =================================**********************
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