Net-cat is a utility that is able to write and read data across TCP and UDP network
connections. If you are responsible for network or system security it essential that you
understand the capabilities of Net-cat. Net-cat can be used as port scanner, a backdoor,
a port re-director, a port listener and lots of other cool things too. It's not always the
best tool for the job, but if I was stranded on an island, I'd take Net-cat with me ☺
During this tutorial I'll demonstrate a complete hack, using Net-cat only, just to point
out how versatile it is.

The simplest example of its usage is to create a server-client chat system. Although this is a very primitive way to chat, it shows how net-cat works.

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