Wireshark

[Hwagm]

Windows 2000/XP/2003/Vista Installer (.exe)

http://www.wireshark.org/

http://www.wireshark.org/download.html

http://prdownloads.sourceforge.net/wireshark/wireshark-setup-0.99.6a.exe

Wireshark is the world's foremost network protocol analyzer, and is the de facto (and often de jure) standard across many industries and educational institutions.

Wireshark development thrives thanks to the contributions of networking experts across the globe. It is the continuation of a project that started in 1998.