Sensor Location

[Phil Daws <uxbod () splatnix net>]

Hello, 

am wishing to learn about the use of Snort and have begun to set up a test environment. What I am unsure of is the best 
place to locate the sensor. The set up I have is: 

Internet -> Physical Host (running KVM with Bridge0) -> KVM Guest acting as Firewall with three interfaces -> eth0 
(Public IP) 
-> eth1 (DMZ 192.168.1.0/24) 
-> eth2 (Internal LAN 192.168.2.0/24) 

Would I be best installing Snort on the physical host and have it monitoring the bridged interface or on the virtual 
firewall and have it monitoring eth0 ? 

Any help would be gratefully appreciated. 

Thank you. 

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