Connecting BSNL broadband in Linux

The BSNL Broadband uses PPPOE (Point to Point Protocol Over Ethernet). Therefore, if you can set this up in your Linux system, you can easily use your broadband connection.
And it is indeed very safe to access the internet from Linux as it is not so easily infested by viruses as is a Windows system.

Basic requirement: Connect your modem with ethernet cable and not with USB (because for broadband, USB stands for Unsuitable for Broadband) :-
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$ sudo pppoeconf
password:

to start the connection:
sudo pon dsl-provider

to stop the connection:
sudo poff
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This process should work for any connection using the PPPOE.