Aqui irei ensinar a configurar o serviço ADSL usando como base o Slackware 10 com instalação full, portanto o pacote rpppoe já está instalado.

Logando-se como root, dê o seguinte comando:

# adsl-setup

Aparecerá a seguinte mensagem:

Welcome to the Roaring Penguin ADSL client setup. First, I will run some checks on your system to make sure the PPPoE client is installed properly...

Looks good! Now, please enter some information:

USER NAME

>>> Enter your PPPoE user name (default seulogin@terra.com.br): Aqui você terá que colocar seu login <enter>

INTERFACE

>>> Enter the Ethernet interface connected to the ADSL modem
For Solaris, this is likely to be something like /dev/hme0.
For Linux, it will be ethn, where 'n' is a number.
(default eth0): aqui você informará onde está sua placa de rede: eth0, eth1, etc..<enter>

Do you want the link to come up on demand, or stay up continuously? If you want it to come up on demand, enter the idle time in seconds after which the link should be dropped. If you want the link to stay up permanently, enter 'no' (two letters, lower-case.) NOTE: Demand-activated links do not interact well with dynamic IP addresses. You may have some problems with demand-activated links.
>>> Enter the demand value (default no): Aqui é para conexão sobre demanda digite 'no' <enter>

DNS

Please enter the IP address of your ISP's primary DNS server. If your ISP claims that 'the server will provide DNS addresses', enter 'server' (all lower-case) here. If you just press enter, I will assume you know what you are doing and not modify your DNS setup.
>>> Enter the DNS information here: Aqui você informará o DNS primário, como é do provedor TERRA, digite 200.176.2.10 (se for outro provedor tem que conseguir seu número de DNS) <enter>

Please enter the IP address of your ISP's secondary DNS server. If you just press enter, I will assume there is only one DNS server.
>>> Enter the secondary DNS server address here: Aqui terá que colocar o DNS secundário, que no meu caso é 200.176.2.12 <enter>

PASSWORD

>>> Please enter your PPPoE password: Senha de seu provedor <enter>
>>> Please re-enter your PPPoE password: Confirme a senha <enter>

FIREWALLING

Please choose the firewall rules to use. Note that these rules are very basic. You are strongly encouraged to use a more sophisticated firewall setup; however, these will provide basic security. If you are running any servers on your machine, you must choose 'NONE' and set up firewalling yourself. Otherwise, the firewall rules will deny access to all standard servers like Web, e-mail, ftp, etc. If you are using SSH, the rules will block outgoing SSH connections which allocate a privileged source port.

The firewall choices are:
0 - NONE: This script will not set any firewall rules. You are responsible for ensuring the security of your machine. You are STRONGLY recommended to use some kind of firewall rules.
1 - STANDALONE: Appropriate for a basic stand-alone web-surfing workstation
2 - MASQUERADE: Appropriate for a machine acting as an Internet gateway for a LAN
>>> Choose a type of firewall (0-2): Aqui você escolherá o tipo de firewall que deseja usar. É apropriado o Standalone. Digite 1 <enter>

** Summary of what you entered **

Ethernet Interface: eth0
User name: seulogin@terra.com.br
Activate-on-demand: No
Primary DNS: 200.176.2.10
Secondary DNS: 200.176.2.12
Firewalling: STANDALONE

>>> Accept these settings and adjust configuration files (y/n)? Acima apareceu algumas informações sobre sua configuração, digite y se estiver tudo correto para salvar. <enter>

Adjusting /etc/ppp/pppoe.conf
Adjusting /etc/resolv.conf
(But first backing it up to /etc/resolv.conf-bak)
Adjusting /etc/ppp/pap-secrets and /etc/ppp/chap-secrets
(But first backing it up to /etc/ppp/pap-secrets-bak)
(But first backing it up to /etc/ppp/chap-secrets-bak)

Congratulations, it should be all set up!

Type 'adsl-start' to bring up your ADSL link and 'adsl-stop' to bring it down. Type 'adsl-status' to see the link status.

Aparece onde foram feita as configurações....

• adsl-start : para você se conectar;
• adsl-stop : encerrar conexão;
• adsl-status : status de sua conexão, como número de IP, transferência, etc.

Bem, pode ocorrer de após você dar o comando adsl-start aparecer:

.CONNECTED!

mas quando você tenta navegar não consegue. Basta você dar os seguintes comandos:

# route del default
# route add default ppp0

Valeu!!!

Espero ter ajudado!!!!

Fernando de Moraes (iescodeiro)