If I use a packet sniffer to watch my network (its how I found that trojan on my other box yesterday) it listens on my ip, meaning I can see whats going on on my laptops connections, but id like to check my other two boxes.

Just putting the packet sniff on my other two boxes would be the easy option but for some reason the sniffer works with the pcmcia card but not the usb ones :s Also because im just lazy...

So as a wonder.. If I could spoof my ip and/or mac as the same as my router, could I watch the connections to my other machines aswell? Or even if I could spoof the same ip/mac as the boxes one at a time?