How to realize PAP Authentication in PPP
Today, I will talk to you about how to achieve PAP authentication in PPP. Many people may not know much about it. In order to make you understand better, the editor has summarized the following for you. I hope you can get something according to this article.
[name of experiment]
PPP PAP certification
[purpose of the experiment]
Master the process and configuration of PPP PAP authentication
[background description]
You are the network administrator of the company. in order to meet the growing business needs, the company has applied for special line access, your customers.
The user router should verify the identity when negotiating the link with ISP, configure the router to ensure that the link is established, and consider its security.
Sex.
[demand Analysis]
Ensure security verification when the link is negotiated. When the link is negotiated, the user name and password are transmitted in clear text.
[preliminary knowledge]
Basic router configuration knowledge, PPP PAP knowledge
[experimental equipment]
2 routers (with serial port)
V.35 cable (DTE/DCE) 1 pair
[experimental principle]
PPP protocol is located in the data link layer of OSI seven-layer model. PPP protocol is divided into two sublayers according to its function: LCP,
NCP . LCP is mainly responsible for link negotiation, establishment, callback, authentication, data compression, multi-link bundling and other functions.
NCP is mainly responsible for negotiating with the upper layer protocols and providing services for the network layer protocols.
The authentication function of PPP refers to the authentication of passwords in the process of establishing a PPP link.
Verify that the link is not removed.
PPP protocol supports two authentication methods: PAP and CHAP. PAP (Password Authentication Protocol
Password authentication protocol (password authentication protocol) means that the authentication parties complete the authentication process through two handshakes, which is used to attempt to log in to the peer pair.
The method of authenticating a user on a point protocol server. The verified party initiates the verification request, including the verified
User name and password. Reply after verification by the verifying party, pass the verification or fail the verification. User name and secret during authentication
The code is transmitted over the link in clear text.
Step 1: basic router configuration
Step 2: configure PAP authentication
Step 3: verify PAP authentication
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