Emergency Ethereal/TCPDump Help Needed

This is not hosting related, but does have to do with sysadmin stuff. At home I've got a small network of computers and a couple linux machines. I've never used Ethereal or TCPDump, but need to. I fear that my daughter is doing stuff on the internet, but I haven't been able to catch her.

I would like to setup Ethereal (probably tethereal) to run on my linux box to capture whatever she is doing on his computer. IM, Mail, Web, everything. My network is connected to a hub (not a switch), so I know that traffic will be broadcast to the linux machine.

And yes I have the legal right to do this in my house, and if what I fear is true I need to do this so please no arguments about privacy. Any help would be greatly appreciated.

 

 

 

 

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