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@quintiles.com
v: +353-1-819-5186, GMT+0
m: +353-87-124-9108
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