You can download the Wireshark tool from the official page: http://www.wireshark.org/download.html.

On Windows systems, we can install the following wizard in the Windows installer. On a Linux distribution based on the Debian operating system, such as Ubuntu, this is as easy as executing the apt-get command:

sudo apt-get install wireshark

One of the advantages of Wireshark is the filtering we can make regarding the captured data. We can filter protocols, source, or destination IP, for a range of IP addresses, ports, or uni-cast traffic, among a long list of options. We can manually enter the filters in a box or select these filters from a default list.