The tasks in this section explain how to implement authentication on a PPP link by using the Challenge-Handshake Authentication Protocol (CHAP). The tasks use the example that is shown in Example of a CHAP Authentication Scenario (Calling a Private Network) to illustrate a working CHAP scenario for dialing up a private network. Use the instructions as the basis for implementing CHAP authentication at your site.
Before you perform the following procedures, you must have done the following:
Set up and tested the dial-up link between the dial-in server and dial-out systems that belong to trusted callers
Obtained superuser permission for the local system, either dial-in server or dial-out system
Setting up CHAP authentication involves actions on the dial-in server and the dial-out system.