How to setting up ADSL under Ubuntu

• ADSLPPPoE

 

目录

1. Introduction
2. Configuring PPPoE with the command line
3. Manual connection control
4. Problems
   1. PPPoE package installation
   2. Boot issues
   3. Error logs

 

Thisguide is for setting up an ADSL Internet connection using an ethernetPPPoE modem under Ubuntu 6.06 LTS (Dapper Drake) but newer versions ofUbuntu will be similar. Warning: This guide is quite old now! Newer versions of Ubuntu use Network Manager (nice GUI) to manage DSL connections.

 

Introduction

 

Although itmay be very common to use a router to connect to the Internet, often itis needed to directly connect to an ADSL (frequently referred to as'DSL') modem using PPPoE.

Thisis useful when you have a modem that don't have internal PPPoE dial upfacility or When your modem is configured for "Bridge" connection. Inboth these cases, You need to do the PPPoE dial-up from your machine.this documentation shows how that can be achived

Of course, you will need to have subscribed to an Internet Service Provider(ISP), and that your Internet connection be installed and functional. A"DSL" light on your modem usually shows that the line is synchronized.

Youwill need your username and password provided by your ISP for your DSLaccount . You must also have an Ethernet card connected to your PPPoEmodem with the correct type of cable.

 

Configuring PPPoE with the command line

 

To set upthe modem, we will use a terminal. To open a terminal, use the menu bar: Applications > Accessories > Terminal.

Youneed the PPPoE package to be installed in order for the followingcommand to work. This package is installed by default, but can bemissing if the configuration has been changed. If the following commanddoes not work, you will need to install this package (see the PPPoEpackage installation section).

In the terminal type:

 

sudo pppoeconf

 

A text-based menu program will guide you through the next steps, which are:

1. Confirm that your Ethernet card is detected.
2. Enter your username(provided by your ISP).
3. Enter your password(provided by your ISP).
4. If you already have a PPPoE Connection configured, you will be asked if it may be modified.
5. Popular options: you are asked if you want the 'noauth' and 'defaultroute' options and to remove 'nodetach' - choose "Yes".
6. Use peer DNS - choose "Yes".
7. Limited MSS problem - choose "Yes".
8. When you are asked if you want to connect at start up, you will probably want to say yes.
9. Finally you are asked if you want to establish the connection immediately.

Once you have finished these steps, your connection should be working.

 

Manual connection control

 

To start your ADSL connection on demand, in a terminal type:

 

pon dsl-provider

 

To stop your ADSL connection, in a terminal type:

 

poff dsl-provider

 

in most cases, you can just type "poff" to stop the ADSL connection and unload the module.

 

Problems

 

If yourconnection does not seem to work, try turning your previouslyconfigured ADSL connection on manually (see previous section). To seelog, in terminal type:

 

plog

 

 

PPPoE package installation

 

To check if the PPPoE package is installed, in a terminal type:

 

dpkg -s pppoeconf

 

If it is installed you should see the output on the package where two lines show this:

 

Package: pppoeconf
Status: install ok installed

 

If the package is not installed, insert your Ubuntu CD and in a terminal type:

 

sudo apt-get install pppoeconf

 

Ifthe package cannot be found, you may have to add your Ubuntu CD to thelist of software repositories. To add your CD, make sure it is insertedin your CD drive and in a terminal type:

 

sudo apt-cdrom add

 

If all else fails, you can download the pppoeconf package from http://packages.ubuntu.com/.Of course you will need a working Internet connection, and then totransfer the package via a CDR or USB stick for example. Double clickon the package in GNOME to install it.

 

Boot issues

 

If you find that you have to run pppoeconf each time you boot, you can try two things:

• Edit /etc/network/interfaces as described here, so that that 'pppoe maintained' lines are before 'auto dsl-provider':

 

# added by pppoeconf
auto eth0
iface eth0 inet manual
pre-up /sbin/ifconfig eth0 up # line maintained by pppoeconf

auto dsl-provider
iface dsl-provider inet ppp
provider dsl-provider

 

• Failing that, edit /etc/rc.local, and before the last line ("exit 0"), add:

 

ifconfig eth0 up
pon dsl-provider

 

 

Error logs

 

If you arehaving problems with your connection, you may find valuable informationin the system message logs. You may acces system logs either in aterminal, or with a graphical interface.

• Touse the grapical log viewer, in the menu bar, go to : System >Administration > System Log. You will find the system messages in/var/log/messages.

• To use the terminal, type:

 

sudo dmesg

 

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CategoryNetworking