![]() ![]() Since Windows (except for 10 WSL) doesn't have man pages, the Windows installer instead provides an HTML file in the installdir ( \Program Files\Wireshark\tshark.html) which is also accessible from the GUI program (Wireshark) under Help / ManualPages (!). Since this is a commandline program you need to read its manual page for detailed instructions. tshark's other modes - to capture and immediately decode and display or to read a capture file with -r and decode and display - are basically similar to tcpdump, but the display is quite a bit different. This option is similar to tcpdump with -w (but not identical). You can later read this file (or each/any of these files) into full-Wireshark to display and analyze. With option -w and related options like -b and -a, tshark similarly has the ability to capture, with optional capture filtering and/or 'display' (!) filtering, directly to a file or series of files, and doing no display at all hence needing almost no RAM. The Wireshark package, including the Windows installer(s), also includes a command-line version tshark. In old versions they were always shown in the capture-options window (in fact they used most of the bottom half of the window, making them hard to miss) now you must go to the second and third tabs of the capture-options window. (Obviously you need disk space for the file(s).) Wireshark is the most often-used packet sniffer in the world. Packet is the name given to a discrete unit of data in a typical Ethernet network. In that case, Wireshark has long had an option to write immediately to a file or a series of files (based on time interval or amount of data), and if you also turn off 'update list in real time' (a separate option) it doesn't take nearly as much RAM. Wireshark is a network protocol analyzer, or an application that captures packets from a network connection, such as from your computer to your home office or the internet. It appears in this case you only really need to capture, and display can be at a later time. I think this change occurred at 2.0, but I don't swear to that. In old versions you had to double-click on the interface in the capture-options window now (or at least recently) it appears in the welcome window and the capture-options window, under the interface list. The location where you specify a capture filter has changed over time. ![]() The capture filter syntax is simpler and less powerful than Wireshark's display filter syntax, but from (and/or to) an IP address is within its capabilities. Packets excluded by the capture filter are not stored at all and don't use memory. Wireshark has supported separate capture-level (libpcap or winpcap) and display filters since at least 2008. ![]()
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