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Configuring Your Internet Connection
You need to configure your modem so that Red Hat Linux can use it to connect to your ISP. The Red Hat Dialup Configuration utility does a good job of detecting, and then configuring, your modem. It also sets up a dial-up account to connect your computer to your ISP and thus to the Internet.Get started by following these steps:Click the GNOME Menu button and choose System ToolsInternet Configuration Wizard.
Remember The GNOME Menu button is the icon that looks like a red fedora in the lower-left corner of your screen.If you’re not logged in as root, you’re prompted to enter the root password in the Input dialog box. Enter the root password.
The Select Device Type window opens. You use this window to configure any type of communications device, such as a modem or network interface. Click the Modem connection option from the menu and then click the Forward button.
The Searching for Modems dialog box appears while the Dialup Configu-ration Tool scans your computer for modems; the window disappears quickly if it detects your modem. If no modem is found, a Warning window pops up informing you that no modem was found. Click the OK button.
If no modem is detected, the Select Modem window appears, as shown in Figure 5-1. (The information displayed may differ on your computer.) Otherwise, if the modem is detected, skip to Step 5.
If the Internet Configuration Wizard doesn’t find a modem, it guesses that a modem is attached to your first serial port: /dev/ttyS0.You can modify the modem settings, if you want, in the Select Modem window. (See the following sections “Locating Your Modem with Linux” and “Locating Your Modem with Windows” for instructions on how to get information about your modem.)
Click Forward again.
The Select Provider window appears.
Enter your phone number, the name of your Internet Service Provider (ISP), and your login name and password in the appropriate boxes in the Select Provider window.
You should also enter your ISP’s prefix and area or country code, if necessary, in the appropriate text boxes.
Click Forward when you’re finished filling in the info.
The IP Settings dialog box opens, as shown in Figure 5-2, and allows you to further configure your dial-up connection.The default options are Automatically Obtain IP Address Settings and Automatically Obtain DNS Information from Provider.Using the default options permits your ISP to automatically assign an IP address and DNS server address to your computer every time you connect. You should nearly always be able to use these settings.
Click the Forward button.
The Create Dialup Connection window appears, showing a summary of the information you just entered.
Click Apply.
The Network Configuration window opens. You see your new modem and any other network device, such as an Ethernet interface, in the window.
Choose the FileSave menu option to save your modem configuration.
Click the Activate button to connect to your ISP.
The Network Configuration tool dials up your ISP, authenticates with your ISP, and provides your computer with an Internet connection. Your IP address, default route, and DNS provider are automatically set by the ISP (using the PPP protocol). Those numbers take precedence over any existing parameters, such as an Ethernet interface, as long as the dial-up connection is active. When you deactivate the connection, your existing (if any) IP address and default route are reset. Your previous DNS provider is reset only if you’re using DHCP on your private network; otherwise, the dial-up DNS provider remains in effect. See the section in Chapter 7 about configuring DNS and an Ethernet or wireless interface.
You now have configured your modem to connect to the Internet. The following two sections help you if you have problems using the Internet Connection Wizard to configure your modem.
Figure 5-1: The Select Modem dialog box.
Figure 5-2: Configuring your dial-up IP settings.
