Chapter 18. Network Configuration

To communicate with other computers, computers must have a network connection. This is accomplished by having the operating system recognize an interface card (such as Ethernet, ISDN modem, or token ring) and configuring the interface to connect to the network.

The Network Administration Tool can be used to configure the following types of network interfaces:

• Ethernet

• ISDN

• modem

• xDSL

• token ring

• CIPE

• wireless devices

It can also be used to configure IPsec connections, manage DNS settings, and manage the /etc/hosts file used to store additional hostnames and IP address combinations.

To use the Network Administration Tool, you must have root privileges. To start the application, go to the Main Menu Button (on the Panel) => System Settings => Network, or type the command system-config-network at a shell prompt (for example, in an XTerm or a GNOME terminal). If you type the command, the graphical version is displayed if X is running; otherwise, the text-based version is displayed.

To use the command line version, execute the command system-config-network-cmd --help as root to view all of the options.

If you prefer modifying the configuration files directly, refer to the Red Hat Enterprise Linux Reference Guide for information on their locations and contents.

	Tip
	Use the Red Hat Hardware Compatibility List (http://hardware.redhat.com/hcl/) to determine if Red Hat Enterprise Linux supports your hardware device.