You can capture on all interfaces, but make sure you check Promiscuous, as shown in the preceding screenshot, as one of the column headers. This will allow you to see all the traffic that is coming into the network interface card. You can also check Enable promiscuous mode on all interfaces, as shown in the lower left-hand corner of the preceding screenshot. After choosing an interface to listen on, and placing it in promiscuous mode, the interface gathers up network traffic.