Configuring Device Security
Defining Authentication
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- Use Default — Uses the default value for the parameter. If Use Default 
check box is selected, the global value of 0.0.0.0. is used and interpreted 
as a request to use the IP address of the outgoing IP interface.
• Key String — Defines the authentication and encryption key for TACACS+ 
server. The key must match the encryption key used on the TACACS+ server. 
The possible values are:
- User Defined — Allows the user to define the Key String value.
- Use Default — Uses the default value for the parameter. If Use Default 
check box is selected, the global value is used which is an empty string.
• Authentication Port — Defines the port number through which the TACACS+ 
session occurs. The default is port 49. 
• Timeout for Reply — Defines the amount of time that passes before the 
connection between the device and the TACACS+ server times out. The field 
range is 1-30 seconds. 
- User Defined — Allows the user to define the Timeout for Reply value.
- Use Default — Uses the default value for the parameter. If Use Default 
check box is selected, the default is 5 seconds.
• Single Connection — Enables a single open connection between the device 
and the TACACS+ server when selected.
STEP 3 Define the relevant fields.
STEP 4 Click Apply. The TACACS+ server is added, and the device is updated.
Modifying TACACS+ Settings
STEP 1 Click Security > Authentication > TACACS+. The 
TACA C S+  Pa ge
 opens:
STEP 2 Click the Edit Button. The 
Edit TACACS+ Server Page
 opens: