Wireshark is the world's most popular network protocol analyzer. It is used for troubleshooting, analysis, development and education.

The following bugs have been fixed: Wireshark is unresponsive when capturing from named pipes on Windows. (Bug 1759)

The following features are new (or have been significantly updated) since version 1.2: The packet list internals have been rewritten and are now more efficient. Columns are easier to use. You can add a protocol field as a column by right-clicking on its packet detail item, and you can adjust some column preferences by right-clicking the column header. Preliminary Python scripting support has been added. Many memory leaks have been fixed. Wireshark no longer supports Windows 2000. Please use Wireshark 1.2 or 1.0 on those systems. Packets can now be ignored (excluded from dissection), similar to the way they can be marked. Manual IP address resolution is now supported. Columns with seconds can now be displayed as hours, minutes and seconds. You can now set the capture buffer size on UNIX and Linux if you have libpcap 1.0.0 or greater. TShark no longer needs elevated privileges on UNIX or Linux to list interfaces. Only dumpcap requires privileges now. Wireshark and TShark can enable 802.11 monitor mode directly if you have libpcap 1.0.0 or greater. Play the RTP stream directly from the RTP Analysis.

Wireshark source code and installation packages are available from http://www.wireshark.org/download.html.

Most Linux and Unix vendors supply their own Wireshark packages. You can usually install or upgrade Wireshark using the package management system specific to that platform. A list of third-party packages can be found on the download page on the Wireshark web site.

Wireshark and TShark look in several different locations for preference files, plugins, SNMP MIBS, and RADIUS dictionaries. These locations vary from platform to platform. You can use About->Folders to find the default locations on your system.

Wireshark may appear offscreen on multi-monitor Windows systems. (Bug 553) Wireshark might make your system disassociate from a wireless network on OS X 10.4. (Bug 1315) Dumpcap might not quit if Wireshark or TShark crashes. (Bug 1419) The BER dissector might infinitely loop. (Bug 1516) Capture filters aren't applied when capturing from named pipes. (Bug 1814) Filtering tshark captures with display filters (-R) no longer works. (Bug 2234) The 64-bit Windows installer does not ship with the same libraries as the 32-bit installer. (Bug 3610) Application crash when changing real-time option. (Bug 4035) Hex pane display issue after startup. (Bug 4056) Crash when sorting column while capturing. (Bug 4273) Packet list rows are oversized. (Bug 4357) Summary pane selected frame highlighting not maintained. (Bug 4445)

Community support is available on the wireshark-users mailing list. Subscription information and archives for all of Wireshark's mailing lists can be found on the web site. Commercial support is available from CACE Technologies. Training is available from Wireshark University.

A complete FAQ is available on the Wireshark web site.