Re: Portscan on an Unaddressed sniffer port

[Jeff Kell <jeff-kell () utc edu>]

Timothy A. Holmes wrote:

> I need to do some sort of scan on an unaddressed sniffing interface on a
> SNORT box to test the installation to see if it is all working right.  I
> have a port scanner on my UBUNTU laptop that I could use if I knew how
> to address the port.
>
> The management interface on the box (it's a FC4 box) is 192.168.0.28 and
> that's eth1
>
> The unaddressed port is eth0 on the same box

Not sure if I understand your exact setup, but let me guess...

If you have a network tap, just connect the unaddressed port to the tap, put the tap itself between the management interface 
and it's upstream switch/router/etc.  Do your scan of any real machine from the management interface.  The unaddressed 
port will see it.

If you have a dumb hub (not a switch), plug both the unaddressed and management interfaces into the port, and connect 
the hub to whatever is upstream.  Then scan as ablve.

If you have a switch, setup a monitor/mirror/span port and hook the unaddressed interface to it, scan as above.

That what you had in mind?  You can't properly send traffic to the port at all -- you have to have to force traffic down 
it's throat at a much more primitive level.

Jeff


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