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1. Install packages pppoe and iproute (they may already be installed).
sudo aptitude install iproute pppoe pppoeconf
2. Understand in what mode the modem you have: a bridge or a router?
If the bridge:
Start configuration ADSL
sudo pppoeconf
in the settings wizard, select the network card, login, password etc. Set it all, or the logic or the data provider sent messages. As a gateway to specify the address of your modem in the network. Usually it is 192.168.1.1 (though Linux can be different), look and check it possible to configure your modem. Or more simply, set the address that you have amassed entering the modem settings. Subnet Mask 255.255.255.0. Address their network on a computer to indicate within 192.168.1.2 - 192.168.1.254.
DNS can install and the modem settings and in company (only in comp.) DNS address from your provider to find out. Usually it is or on the website or in the contract.
Everything after this action you can go to the Internet.
3. If in the router - then configure DNS, login and password to drive to your modem.
And in a computer network sets the address, subnet mask and gateway is set as the address of the modem. Put on the DNS machine. rozryva connection to use the command: sudo poff-DSL provider to connect sudo pon dsl-provider if this handles. ADSL configuration file located in / etc / ppp / pppoe.conf.