Snort mailing list archives

Re: ACID gives erroneous information


From: "Josh Berry" <josh.berry () netschematics com>
Date: Sun, 29 Feb 2004 12:41:00 -0600 (CST)

ACID is just a cache for alerts.  When you delete alerts out of ACID I
don't believe that it deletes them out of the Snort tables.   Therefore if
you deleted some alerts out of ACID they will still be in the Snort event
table and therefore you will see a difference in the amount.

I am not sure about this but I think that is what is happening.

Hi,

I'm using ACID to see the Snort output, but when checking with the raw
data, I
see some mysterious results:
In my event table, I see 80 events (it's just a recently reseted test
environment :-) ), but acid_alert only contains 38 records!
All other data (number of destination IP's and so on that ACID gives are
wrong
to (logic, as ACID hasn't used all the records it should use...)
What goes wrong? Or is there a way to interpret the events that I'm
unaware
of? (i.e. are not all different records, different alerts?) This still
leaves
me with the question why there are more IP destinations found when I join
event on iphdr (on sid and cid), as distinct ip addresses clearly belong
to
different event recordings...

Greetings,
Erwin Van de Velde
Student of University of Antwerp
Belgium



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Thanks,
Josh Berry, CISSP
CTO, VP of Product Development
LinkNet-Solutions
469-831-8543
josh.berry () linknet-solutions com



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