ppp authentication

This command enables PPP authentication and defines the supported authentication protocols for PPP over cellular interface.

Syntax

ppp authentication <protocol>

Command	Description
pap	Defines the Password Authentication Protocol as PPP authentication protocol. This is for normal login -when a connection has been made the host sends the username and password.
chap	Defines the Challenge Handshake Authentication Protocol as PPP authentication protocol. With CHAP, the authenticator (i.e. the server) sends a randomly generated "challenge" string to the client, along with its hostname. The client uses the hostname to look up the appropriate secret, combines it with the challenge, and encrypts the string using a one-way hashing function. The result is returned to the server along with the client's hostname.
ms-chap	Defines the Microsoft Challenge Handshake Authentication Protocol as PPP authentication protocol.
ms-chap2	Defines the Microsoft Challenge Handshake Authentication Protocol 2 as PPP authentication protocol.

Default

All four authentication protocols are set as on (no limit is placed on which and how many authentication is used - all four can be activated on the same interface).

You can disable some protocol using “no ppp authentication <protocol>” command

Command Mode

Privileged User

Note

The command is applicable only to PPP-based cellular modems.

For disabling authentication protocol, use the command “no ppp authentication <protocol>”.

Example

This example disables the authentication protocol.

(config-data)# interface cellular 0/0
(conf-cellular)# no ppp authentication chap