How to sniff network traffic with Wireshark

“The internet is inherently insecure. Whenever you send data
across it, there is a chance that that data could be sniffed, and
someone could end up with your personal data. Hopefully once you’ve
read this article, you’ll have a better understanding of how to
prevent this from happening.

“When data travels through the internet, it needs to pass
through multiple connections to get to its final destination. Most
people don’t realise that the data can be read by any machine it
passes through on this journey. With the right tools, you can sniff
this data yourself, and any data that passes through your network.
This is because most networks actually send data intended for
anyone on that network to all machines on your network, and your
computer will ignore anything that’s not meant for it. This is
especially true for most wireless networks, even networks that are
‘secured’ with WEP/WPA.

“Ooh, what’s that smell?

“Let’s try sniffing some of the data on your network. First of
all, you need to install a tool called Wireshark. Most
distributions have this available in their package manager, and for
Ubuntu, I ran the command…”

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