Capture network traffic of another device from PC
If both the PC and other devices are connected to a dumb hub, it should be fairly easy.
With tcpdump,
sudo tcpdump -nn -i eth1 -s 65535
With wireshark, BEFORE starting the capture, set filter on the option dialog as:
host 10.177......
http://www.wireshark.org/docs/wsug_html_chunked/AppToolstcpdump.html