Security
Configuring TACACS+
Cisco 350, 350X and 550X Series Managed Switches, Firmware Release 2.4, ver 0.4 319
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In addition to providing authentication and authorization services, the TACACS+ protocol 
helps to ensure TACACS message protection through encrypted TACACS body messages.
TACACS+ is supported only with IPv4.
Some TACACS+ servers support a single connection that enables the device to receive all 
information in a single connection. If the TACACS+ server does not support this, the device 
reverts to multiple connections.
Accounting Using a TACACS+ Server
The user can enable accounting of login sessions using either a RADIUS or TACACS+ server. 
The user-configurable, TCP port used for TACACS+ server accounting is the same TCP port 
that is used for TACACS+ server authentication and authorization.
The following information is sent to the TACACS+ server by the device when a user logs in or 
out:
Defaults
The following defaults are relevant to this feature:
• No default TACACS+ server is defined by default. 
• If you configure a TACACS+ server, the accounting feature is disabled by default.
Table 1:
Argument Description In Start 
Message
In Stop 
Message
task_id A unique accounting session 
identifier. 
Yes Yes
user Username that is entered for login 
authentication.
Yes Yes
rem-addr IP address of the user. Yes Yes
elapsed-time Indicates how long the user was 
logged in.
No Yes
reason Reports why the session was 
terminated.
No Yes