Your ISP will tell you if you are using PAP or CHAP.
Your ISP typically provides services such as news and mail servers for use with your Internet connection.
To configure these useful services, you need the following information:
Mail server??”If your ISP is providing you with an e-mail account, you must know the
address of the mail server, the type of mail service (such as POP3??”Post Office Protocol;
or IMAP??”Internet Message Access Protocol), and the authentication password for the
mail server so you can get your e-mail.
News server??”If your ISP provides the name of a news server so that you can participate
in newsgroups, the server may require you to log on, so you need a password. The
ISP provides that password, if required.
After you??™ve gathered this information, you??™re ready to set up your connection to the Internet. To
configure Linux to connect to your ISP, read on.
Setting Up Dial-Up PPP
PPP is used to create IP connections over serial lines. Most often, the serial connection is established
over a modem; however, it also works over serial cables (null modem cables) or digital lines (including
ISDN and DSL).
Although one side must dial out and the other side must receive the call to create the PPP connection
over a modem, after the connection is established, information can flow in both directions.
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