Capturing packets with Wireshark consists of selecting the correct network interface to capture packets from, applying any capture filters that may be appropriate, and applying the correct options to accomplish the capture in the desired manner. We'll cover these three topics in the following sections.
As discussed in Chapter 1, Getting Acquainted with Wireshark, if you have multiple network interfaces on your machine, you need to determine and select the correct interface to capture packets. In Wireshark's Capture menu, click on Interface or click on the first icon on the icon bar.
The Wireshark Capture Interfaces window provides a list and description of the network interfaces on your machine, the IP addresses assigned, and the total packets and packets per second counters for each interface. If an interface has an IPv6 address assigned and this is being displayed, you can click on the address to toggle and...