MRV Communications LX-4000 Series Información técnica descargar pdf (Pagina 526)

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APPENDIX C TACACS+ Authentication and

Authorization

TACACS+ authentication occurs through a series of

communications between the LX unit and the TACACS+ server.

Once TACACS+ has authenticated a user, the LX unit provides

that user with access to the appropriate network services. The

TACACS+ server maintains a database that contains user

authentication and network service access information.

TACACS+ uses the Transport Control Protocol (TCP) on port 49

to ensure reliable transfer. The entire body of the packet is

encrypted using a series of 16 byte MD5 hashes. The protocol is

split up into 3 distinct categories: Authentication, Authorization,

and Accounting.

Authentication is the process of determining who the user is.

Usually a user is required to enter in a user name and password

to be granted access. Authorization is the process of

determining what the user is able to do. The profile in the

TACACS+ server should have a service of exec and a priv-lvl of

15 in order to access Superuser privileges, otherwise the user

will only be able to be in user mode. Accounting records what

the user has done and generally occurs after authentication and

authorization.

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MRV Communications LX-4000 Series Información técnica Pagina 526

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