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Article Reference

Article ID: 3829
Last update: 02-01-05
Issue:
How do I configure my modem to connect to the Internet using a PPP dialup account?
Resolution:
To set up your system for modem-based Internet access, follow these steps:
  1. After installing your modem, run the following command as root to have the wvdialconf program scan the modem and learn it's correct initialization string, max speed and other configuration information:

    # wvdialconf /etc/wvdial.conf

  2. Edit the newly created /etc/wvdial.conf file and add a section named [Dialer myispname]. Replace "myispname" with the name of your ISP, add the ISP's modem number, your username and your account password to this section. These three variables were automatically created in the Defaults section, but were left commented out. They should be copied down into their own section in case you need to add additional accounts in the future. To avoid problems, do not use non-alphanumeric characters for "myispname". Note that the information you see under your computer's [Dialer Defaults] section may be different from what's written below. These are just example settings. Do not change your [Dialer Defaults] section to match what you see here.

    Example /etc/wvdial.conf file: 

    [Dialer Defaults]
Modem = /dev/ttyS0
Baud = 115200
Init1 = ATZ
Init2 = ATQ0 V1 E1 S0=0 &C1 &D2 S11=55 +FCLASS=0

[Dialer myispname]
Phone = 555-1212
Username = myusername
Password = mypassword


  3. Create the file /etc/sysconfig/network-scripts/ifcfg-ppp0, using this information as a template:

    Example ifcfg-ppp0 file: 

    DEVICE=ppp0		#Device name
USERCTL=yes		#Allow any user to activate/deactive the interface?
PEERDNS=yes		#Get DNS servers from ISP?
TYPE=Modem		#What type of device?
BOOTPROTO=dialup	#What boot protocol?
ONBOOT=no		#Start the interface on boot?
NAME=myispname		#Name of the connection
LINESPEED=115200	#Max speed of the interface
MODEMPORT=/dev/ttyS0	#Modem port (set to the value from wvdial.conf)
IDLETIMEOUT=600		#Idle time before hangup
DEMAND=no		#Dial on demand?
DEFROUTE=yes		#Is this interface the default route?
PERSIST=no		#Redial if connection lost?
WVDIALSECT=myispname	#Section in wvdial.conf to read for settings
MODEMNAME=Modem0	#Name of modem


    Replace all instances of "555-1212" "myispname" "myusername" and "mypassword" with the appropriate values for your ISP. Do not use non-alphanumeric characters for "myispname".

    Now, to connect to your isp, open a terminal and type this command:

    $ ifup ppp0

    The modem will pick up and call the ISP. When you have finished with your session, type this command to hang up:

    $ ifdown ppp0
If you want to set your system up with multiple modems, multiple dialup numbers, usernames and passwords, consult the man pages for wvdialconf, wvdial.conf and wvdial for additional information.


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