Wireshark is intended to quickly capture then analyze network packets and display detailed information about them. In the past, such tools were either very expensive, proprietary, or both. However, all that has changed. Wireshark is perhaps one of the best open source packet analyzers available today allowing you to troubleshoot network problems, examine security difficulties, debug protocol implementations, and learn network protocol internals.Wireshark is available for UNIX and Windows; it allows you to capture live packet data from a network interface and then display them with very detailed protocol information. You can also import/export packet data in conjunction with many other capture programs.