The bottom pane is the packet bytes pane, and details the individual bytes that comprise a packet, shown in hex and ASCII format, similar to tcpdump’s –X option. The middle pane is the packet details pane, and shows detailed information about the data fields contained within the packet that is selected in the packet list pane. The default columns include a packet number, a timestamp (defaulting to the time since the beginning of the capture), source and destination address, protocol, packet length, and an info column that contains protocol-specific information. The uppermost is the packet list pane, which shows each packet summarized into a single line, with individual fields separated as columns.

Looking at the image above, you will notice that Wireshark is divided into three panes. WinDump can be used to watch, diagnose and save to disk network traffic according to various complex rules.Figure 13.30. is also the home of WinDump, the Windows version of the popular tcpdump tool. Some of these networking tools, like Wireshark, Nmap, Snort, and ntop are known and used throughout the networking community. Thanks to its set of features, WinPcap has been the packet capture and filtering engine for many open source and commercial network tools, including protocol analyzers, network monitors, network intrusion detection systems, sniffers, traffic generators and network testers. This library also contains the Windows version of the well-known libpcap Unix API. WinPcap consists of a driver that extends the operating system to provide low-level network access and a library that is used to easily access low-level network layers. For many years, WinPcap has been recognized as the industry-standard tool for link-layer network access in Windows environments, allowing applications to capture and transmit network packets bypassing the protocol stack, and including kernel-level packet filtering, a network statistics engine and support for remote packet capture.

Wireshark not capturing packets