• Ntop is a network monitoring utility. You can monitor local devices as well as devices with Netflow output (like a Cisco router). It's very easy to install too, open a terminal and type:

              sudo apt-get install ntop

• Now that it is installed, you have to do some basic setup. Once again, in the terminal, type:

                       sudo ntop

• You will be asked for a password, and then to confirm the password. This will be the admin password for the ntop web interface. Next, we want to install "Dot", which is a part of the "Graphviz" package:

                   sudo apt-get install graphviz

•  Now, again in the terminal type:

               sudo /etc/init.d/ntop start

• Thats it! ntop is running! Try browsing to http://127.0.0.1:3000 to get started. You will have to add the path to dot to the ntop configuration.

            Admin -> Configure (Enter admin user/pass) -> Preferences

• At the bottom add a new preference:

                   dot.path  /usr/bin/dot

• You should now have a network map for the local interface under IP -> Local -> Network Traffic Map

              Visit http://www.ntop.org/ for more information

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