- [Instructor] Let's go over what is Airtun, or Airtun-ng.
With Airtun-ng, you can create virtual interfaces.
Basically, you do this to either allow all encrypted traffic
to be monitored, right,
basically for the purpose
of a Wireless Intrusion Detection System,
or what we call WIDS,
or you can use that virtual interface
to inject arbitrary traffic to the wireless network.
Now, if you want to do the WIDS,
or the Wireless Intrusion Detection System functionality,
you need to have the encryption key
and the BSSID for the network that you want to monitor.
Now Airtun-ng decrypts all the traffic
for the specific network
and then you can also pass it down
to a traditional IDS system like SNORT.
So in this case, and for this example,
I'm invoking the Airtun-ng tool.
We're using the -a option
and specifying the BSSID of the wireless network
that we want to monitor.
And in this case, I'm also entering the web key
with the -w option
and then specifying my wireless interface.
You can see that the tap interface at0 has been created.
So let's do an ifconfig to see it,
and there you go.
You can actually see that the virtual interface
has been created
and that it is actually already receiving some packets.