--> There are three different types of messages used during TACACS + Authentication Process:
1) Start ( From AAA client to AAA Server)
2) Reply ( From AAA Server to AAA Client)
3) Continue ( From AAA Client to AAA Server)
--> Basically whenever we try to connect to a network device using SSH or telnet then the network device ( AAA client) gonna send the authentication request to the AAA server if tacacs protocol is used.
--> Then the AAA server will send a Reply message to AAA client to provide the username.
--> The username is sent to AAA Server using Continue Message from AAA Client.
--> Once the AAA server receives the username from the AAA server then it is going to send one more Reply message asking the password.
--> AAA client will send the password by using CONTINUE Message to AAA Server.
--> AAA Server will send the final Reply message with Pass or Fail Status of Authentication.
--> The final reply message can be one of the following:
1) Accept: Authentication is a success, Proceed for Authorization
2) Reject: Authentication is failed
3) ERROR: There is some failure happened during authentication
4) CONTINUE: User need to provide additional information in order to authenticate.
1) Start ( From AAA client to AAA Server)
2) Reply ( From AAA Server to AAA Client)
3) Continue ( From AAA Client to AAA Server)
--> Basically whenever we try to connect to a network device using SSH or telnet then the network device ( AAA client) gonna send the authentication request to the AAA server if tacacs protocol is used.
--> Then the AAA server will send a Reply message to AAA client to provide the username.
--> The username is sent to AAA Server using Continue Message from AAA Client.
--> Once the AAA server receives the username from the AAA server then it is going to send one more Reply message asking the password.
--> AAA client will send the password by using CONTINUE Message to AAA Server.
--> AAA Server will send the final Reply message with Pass or Fail Status of Authentication.
--> The final reply message can be one of the following:
1) Accept: Authentication is a success, Proceed for Authorization
2) Reject: Authentication is failed
3) ERROR: There is some failure happened during authentication
4) CONTINUE: User need to provide additional information in order to authenticate.
Am I the only person, who has a problem with the authentication? It doesn't work at all. I face different errors all the time.
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