Netgear M4300-8X8F (XSM4316S) - Stackable Managed Switch with 16x10G including 8x10GBASE-T and 8xSFP+ Layer 3 Administrator's Guide

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Security Management 
355
 Managed Switches
6. 
Verify that command and privileged EXEC authorization are set up for Telnet.
7. 
Using Linux on the TACACS server, configure an encryption key in the file tac_plus.conf.
(Netgear Switch)#show authorization methods
Command Authorization Method Lists
-------------------------------------
dfltCmdAuthList               :      none
commandlist                   :      tacacs
Line       Command Method List
---------  ---------------------
Console    dfltCmdAuthList
Telnet     commandlist
SSH        dfltCmdAuthList
Exec Authorization Method Lists
-------------------------------------
dfltExecAuthList               :      none
Line       Exec Method List
---------  ---------------------
Console    dfltExecAuthList
Telnet     dfltExecAuthList
SSH        dfltExecAuthList
key = "12345678"
accounting syslog;
accounting file = /var/log/tac_plus/tac_plus.acct