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Interfaces on Snort

Expert Michael Gregg answers a reader question about Snort and the interfaces it uses.

What is the use of interfaces in Snort execution? How does one select the required interface in Snort execution?
An interface refers to what network interface cards (NIC) you are using to monitor the network. Then interface is typically selected by entering syntax such as eth0 or eth1. As an example, "snort -d -i eth0"
This was first published in October 2010

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