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Practical Linux by Bill Ball, John Ray, Michael Turner, M. Drew Streib

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Enabling Dial-In Service

Enabling dial-in service on a Linux system requires two programs:

  • The PPP daemon (PPPD), which is used to detect incoming connections and to shut down active PPP links when a connection terminates.

  • The getty program, which handles modem communications intelligently. This chapter gives an overview of the format of the file, /etc/gettydefs, used to handle login process for a dial-in user.

These programs are available on every Red Hat Linux installation.

The process in which a user establishes a PPP link is as follows:

  1. The phone number of the modem connected to the Linux system (the PPP server) is dialed from a remote host (the PPP client).

    The user logs in to the server with a valid username and password.

  2. At the shell prompt, ...

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