Networking

Change the Computer Name

  1. System->Administration->Networking

  2. Select the General tab. Enter the name of the computer in the Hostname field.

  3. Click OK, close all open applications and reboot.

Networking Utilities

Firestarter Firewall

A firewall protects a computer system from unauthorized access. It is not normally necessary to install a firewall on an Ubuntu system, because access to the system is closed by default. However, if you run any services which you allow other computers to access (for example, the Apache web server), it is advisable to install a firewall. Firestarter is a program which allows you to control a firewall through a graphical interface.

  1. Install the Firestarter package from the Universe repository (see Chapter 2, Adding, Removing and Updating Applications).

  2. After it is installed, run Applications->System Tools->Firestarter to configure your firewall. The firewall will now start in the background when your computer starts.

Graphical Network Monitor

Etherape displays network activity among different hosts using circles of varying size.

  1. Install the etherape package from the Universe repository (see Chapter 2, Adding, Removing and Updating Applications).

  2. Choose: Applications->Internet->Etherape

Network Traffic Analyzer

Ethereal is a network traffic analyzer/sniffer that captures packets off the network in real time and displays the contents of them.

  1. Install the ethereal package from the Universe repository (see Chapter 2, Adding, Removing and Updating Applications).

  2. Choose: Applications->Internet->Ethereal

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