Wireshark

Wireshark is the world’s foremost and widely-used network protocol analyzer. It lets you see what’s happening on your network at a microscopic level and is the de facto (and often de jure) standard across many commercial and non-profit enterprises, government agencies, and educational institutions. Wireshark development thrives thanks to the volunteer contributions of networking experts around the globe and is the continuation of a project started by Gerald Combs in 1998.

Wireshark v2.2.17 2018-09-16 build

Wireshark v2.2.13 2018-02-25 build

Wireshark v2.2.9 2017-09-24 build

Wireshark v2.2.8 2017-07-24 build