![how to configure RADIUS authentication on a Cisco router for telnet access | Learn Linux CCNA CEH IPv6 Cyber-Security Online how to configure RADIUS authentication on a Cisco router for telnet access | Learn Linux CCNA CEH IPv6 Cyber-Security Online](https://linuxtiwary.files.wordpress.com/2015/06/radius-authentication.png)
how to configure RADIUS authentication on a Cisco router for telnet access | Learn Linux CCNA CEH IPv6 Cyber-Security Online
![how to configure RADIUS authentication on a Cisco router for telnet access | Learn Linux CCNA CEH IPv6 Cyber-Security Online how to configure RADIUS authentication on a Cisco router for telnet access | Learn Linux CCNA CEH IPv6 Cyber-Security Online](https://linuxtiwary.files.wordpress.com/2015/06/radius-server-machine.png)
how to configure RADIUS authentication on a Cisco router for telnet access | Learn Linux CCNA CEH IPv6 Cyber-Security Online
![Cisco Router/Switch AAA Login Authentication configuration using TACACS+ and RADIUS Protocols through IOS Commands Cisco Router/Switch AAA Login Authentication configuration using TACACS+ and RADIUS Protocols through IOS Commands](https://www.omnisecu.com/images/ccna-security/aaa-lab-topology.jpg?ezimgfmt=rs:342x218/rscb3/ng:webp/ngcb3)