Authentication server setup 
 
 
- Installation
- 
- Download the binary source code
- Compile, Install and configure
 
- Enable authentication on the router
- 
- TACACS+
aaa new-model
 
 aaa authentication login default group tacac+ enable
 aaa authentication enable default group tacac+ enable
 aaa accounting exec start-stop group tacac+
 
 ip tacacs source-interface
 tacacs-server host 215.20.110.1 port xx
 tacacs-server key trstech#01