PPP CHAP Authentication

Experiment Name: PPP PAP (CHAP) authentication

Experimental Purpose: Mastering the process and configuration of PPP PAP (CHAP) authentication

You are the company's network administrator, the company in order to meet the growing business needs, to apply for a dedicated line access, your client router and ISP to verify the identity of the link, configure the router to ensure link establishment, and consider its security.
Requirement Analysis: guarantees security validation during link negotiation. The user name and password are transmitted in clear text when the link is negotiated.
experimental topology:

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"experimental Principles" The
PPP protocol is located at the data link layer of the OSI seven-tier model, and the PPP protocol is divided into two sub-tiers by function: LCP, NCP. LCP is mainly responsible for the link of the quotient, establishment, callback, authentication, data compression, multi-link bundle and other functions. The NCP is primarily responsible for negotiating with upper-level protocols, providing services for network layer protocols the authentication function of PPP refers to the authentication of the password in the process of establishing the PPP link, verifying that the link is not removed by establishing the connection. The PPP protocol supports two authentication methods, PAP and CHAP. PAP (Password authentication Protocol, Password Authentication protocol) refers to verifying that both parties complete the verification process through two handshakes, which is a method for authenticating users attempting to log on to a point-to-site protocol server. Authentication requests are initiated by the authenticated party, which contains the authenticated user name and password. A reply is made after validation by the verifier, either through validation or validation failure. During validation, the user name and secret

The code is transmitted on the link in clear text mode.

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Verify:

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PPP CHAP Authentication