Or maybe I need to use a wired connection (rather than wireless connection) when connecting my packet inspection computer to the router. I'm guessing it may have something to do with the fact that my router is using WPA2 encryption, instead of being unencrypted (like an "open" wireless network). An yes, I'm using the latest NPCap driver installed by the Wireshark installer. And this is despite the fact that I put a tick in the check box for promiscuous mode, for my wi-fi adapter in the Wireshark adapters settings, and made sure to select that adapter as my capture adapter. On modern networks that use devices called switches, Wireshark (or any other standard packet-capturing tool) can only sniff traffic between your local computer and the remote system it is talking to. I can't see any communications between the router and another computer (at the ethernet packet level) or between any 2 other computers on my network (at the IP address level). Second, Wireshark can’t grab traffic from all of the other systems on the network under normal circumstances. Generally, most networks today operate on the TCP/IP stack, which makes it possible for devices connected to the internet to communicate with one another across. The details of the highlighted packet are displayed in the two lower panes in the Wireshark interface. The packets are presented in time order, and color coded according to the protocol of the packet. In the new Capture Interfaces window that opens, select the interface you want to capture packets (with the check box on the left-hand side) and clickOptions. Clicking the red square icon will stop the data capture so you can analyze the packets captured in the trace. At the IP address level, I can only see packets with my computer's IP address as either the destination or source address. When you first start Wireshark, click on the button in the far upper-left that says List the available capture interfaces when you scroll over it. At the ethernet packet level, I can only see packets between my router and my computer. Use the following display filter to show all packets that contain the specific IP in either or both the source and destination columns: ip.addr.
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