Config PPPoE in Ububtu for ADSL,etc

follow:

1. Run :
   sudo pppoeconf
2. A text-based menu program will guide you through the next steps:
   1. Confirm that your Ethernet card is detected.
   2. Enter your username.
   3. Enter your password.
   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. You are asked if you want to connect at start up.
   9. Finally you are asked if you want to establish the connection immediately.
3. Once you have finished these steps, your connection should be working.

To start your ADSL connection on demand, in a terminal type:
sudo pon dsl-provider
To stop your ADSL connection, in a terminal type:
sudo poff dsl-provider