Beginner How-to for Wireshark

#1

Wireshark is an incredible open source, free tool that allows you to monitor your network traffic. It can be useful for tons of things when it comes to tracking down where your bandwidth is going, why certain machines seem to always be downloading or uploading something, and even why certain network services aren’t working.

http://www.tecmint.com/wireshark-network-traffic-analyzer-for-linux/