This section contains planning information for providing authentication on the PPP link. Chapter 5, Setting Up Point-to-Point Protocol Authentication contains tasks for implementing PPP authentication at your site.
PPP offers two types of authentication, PAP, which is described in detail in Password Authentication Protocol (PAP) and CHAP, which is described in Challenge-Handshake Authentication Protocol (CHAP).
Before you set up authentication on a link, you must choose which authentication protocol best meets your site's security policy. Then, you set up the secrets file and PPP configuration files for the dial-in machines, or callers' dial-out machines, or both types of machines. For information about choosing the appropriate authentication protocol for your site, see Why Use PPP Authentication?.
This section includes the following information:
Planning information for both PAP and CHAP authentication
Explanations of the sample authentication scenarios that are shown in Figure 2–3 and Figure 2–4
For tasks about setting up authentication, see Chapter 5, Setting Up Point-to-Point Protocol Authentication.