False positives

[Jesús Gálvez <jesuxgalvez () yahoo es>]

Hi. I have snort running as NIDS in a LAN. I use ACID to see the alerts. I find a lot of falses positives, coverall 
this:


(portscan) TCP Portsweep          

and show local source IP and destiny IP that aren´t scanning, some even doesn´t exist. I don´t know what rule can be 
trigger the alarm. Anybody can help me?

Thanks.

                
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