OT log analyzer

[Cristiano <cristiano_df () UOL COM BR>]

Hi all,

 
I read a interesting article from Steve Romig in Usenix. In this article he explains how we can use cisco netflow for 
Intrusion Detection. I was thinking if is there in anyplace a commercial sofware that makes something similar ?

Have anyone know-how with Cisco log analyzers for Intrusion Detection ?  


Steve romig's article 
 
http://www.usenix.org/publications/login/1999-9/osu.html

thank you in Advance

Cristiano