how rules work

[Robert Fowler <robshomemail () yahoo com>]

hi

I am very very new to Snort just downloaded and compiled it.  What I need to know is how rules work. I downloaded the 
rules from Sourceforce and installed. I have also setup Base and Mysql to log the traffic.  I have a SPAN port sending 
information to my SNort box from a paticular VLAN I need to monitor.

Basically can I disable all rules and add them one by one ? and what file determines what rules to use ?  
Will SNORT act as an IPS and kill my network or just it just monitor traffic ?

Also on a seperate note do I need the network interface to operate in pernicios mode and does this need a specific 
switch when starting snort.

Thanks for the help
Robert


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