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Cisco IOS in a Nutshell, 2nd Edition by James Boney

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Name

ppp authentication — interface

Synopsis

ppp authentication {chap | pap} [if-needed] [list] [callin]
no ppp authentication

Configures

Enables CHAP or PAP authentication

Default

No authentication

Description

This command enables CHAP or PAP authentication on interfaces. In addition to the type of authentication, this command may have the following parameters:

if-needed

Optional. Prevents reauthorization if the user has already been authorized at some other point during the session.

list

Optional. Provides a list of AAA authorization methods. To set up an authorization list, use the command aaa authentication ppp.

callin

Optional. Tells the interface to authorize incoming (dial-in) connections only.

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