Networking

Change the Computer Name

  1. Open System->Administration->Networking .

  2. Click General, and enter the name of the computer in the Hostname field.

Restart the computer for the change to take effect.

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 that let other computers access yours (for example, the Apache web server), it is advisable to install a firewall. Firestarter is a program that lets you control a firewall through a graphical interface.

  1. Install the Firestarter package from the “Universe” repository (see Chapter 3, 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 3, 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 their contents.

  1. Install the ethereal package from the “Universe” repository (see Chapter 3, Adding, Removing and Updating Applications).

  2. Choose: Applications->Internet->Ethereal

Browse Network Computers

To view computers on the network, open Places->Network Servers.

You may need to enter a username, password, and domain. You should obtain these from your network administrator.