Tell us about yourself!
A few thoughts about your configuration. If you have your network set up modem -> router/wifi -> switch -> everything else. If your S.O. box is on your switch on a mirrored port then you wont see any of the traffic that is on your wifi. That is why I had to run the two routers one to nat my network and one for wifi so the S.O. box would see the traffic. The hardest thing with doing S.O. on a laptop is that you only have one NIC which means you have not management interface.