Chapter 5. Connecting to the Internet
Perhaps the most important change in communication since the
telephone, the Internet is a large part of our world today. Red Hat Enterprise Linux
has the tools necessary to allow you to connect to that world.
There are many types of Internet connections, including:
- ISDN Connection
An ISDN (Integrated Services Digital Network) connection
uses high-speed, high-quality digital telecommunication
lines as opposed to an analog modem connection. This special
phone line must be installed by a phone company.
- Modem Connection
A modem connection uses a normal phone line to establish a
connection to the Internet. Digital data is modulated into
analog signals and sent over phone lines.
- Wireless Connection
A wireless connection uses a wireless access point (WAP) or
peer-to-peer network with a wireless network card.
- xDSL Connection
An xDSL (Digital Subscriber Line) connection uses
high-speed transmissions through telephone lines. There are
different types of DSL such as ADSL, IDSL, and SDSL.
Internet Configuration Wizard
uses the term xDSL to mean all types of DSL connections.
- Ethernet Connections
Some xDSL and cable modem connections require users to set
up their connections via Ethernet. The ethernet card in your
Red Hat Enterprise Linux system communicates with the xDSL or cable modem,
which communicates in turn with your ISP.
This chapter discusses setting up a modem (or dial-up) connection
in detail. The procedures for creating connections of the
remaining types is similar, but may require additional steps or
information from your Internet Service Provider (ISP).
Your own ISP may have specific connection requirements for their
service which differ from the instructions in this chapter. Before
connecting, check with your ISP for any specific instructions that
they provide, including the following information:
The phone number that your modem must dial to connect to
your ISP if you are using a modem.
Your login name and password for your account if you are
using an xDSL or modem connection.
A gateway address. Some ISPs may
require you to configure a master address (called the gateway)
that authenticates your computer and allows it to connect to
DNS entries: DNS means
Domain Name System. DNS servers act as a
road map for the Internet. When you use the Internet, the DNS
tells your machine where to send its traffic. DNS tracks
IP (Internet Protocol) addresses; each
computer connected to the Internet must have an IP address, which
is a unique set of numbers like
2xx.2xx.2x.2. You may receive one or
more DNS entries from your Internet provider when you sign up.
5.1. The Internet Configuration Wizard
Figure 5-1. Internet Configuration
Red Hat Enterprise Linux includes the Internet Configuration
Wizard. The Internet Configuration
Wizard is available from the (the main menu on the
sub-menu, or from a shell prompt via the command
internet-druid. This tool guides you step-by-step through the
process of establishing a new Internet connection.
When you first start the Internet Configuration Wizard, you are
required to enter your root password.
Each of the types of connections are listed in the left pane of
the window. Select the type of connection to establish, then
follow the steps of the wizard.
The next section of this chapter goes through the details of
creating a dial-up connection as an example.