9.8. If your PPP server uses PAP (Password Authentication Protocol)

Many ISPs and corporate PPP servers use PAP. If your server does not require you to use PAP (if you can log in manually and receive the standard user name/password text based prompts it does not use PAP), you can safely ignore this section.

Instead of logging into such a server using a user name and password when prompted to enter them by the server, a PPP server using PAP does not require a text based login.

The user authentication information instead is exchanged as part of the link control protocol (LCP), which is the first part of establishing a PPP link.

Section Chapter 16 provides information on the files you need to set up to establish a PPP link using PAP.