# Radius Server

RADIUS proxy servers are used for centralized administration. Remote Authentication Dial in User Service (RADIUS) is a networking protocol that provides centralized Authentication, Authorization, and Accounting (AAA) management for users that connect and use a network service for greater convenience. RADIUS is a server protocol that runs in the application layer, using UDP as transport. The Network switch with port-based authentication and all have a RADIUS client component that communicates with the RADIUS server. Clients connected to a port on the switch must be authenticated by the Authentication server before accessing services offered by the switch on the LAN. Use a RADIUS server to authenticate users trying to access a network by relaying Extensible Authentication Protocol over LAN (EAPOL) packets between the client and server. The RADIUS server maintains a user database, which contains authentication information. The switch passes information to the configured RADIUS server, which can authenticate a username and password before authorizing use of the network.

![](https://lh3.googleusercontent.com/ACdtWQVvO_n5fEal70k4vhLX-Nwnw_rhfTXTFE5KDpuzL-izCgWh0vcF6__gTwVmDNBtOiQ7_eV3FolRkLA1-sVSH9kwl3mZBATIbSHgd9HeaBxpQxqkHoD8SpvsdPuF3jpZcj4)

| Items           | Description                                                                                                                                 |
| --------------- | ------------------------------------------------------------------------------------------------------------------------------------------- |
| Index           | Displays the index for which RADIUS server is displayed.                                                                                    |
| Server IP       | Enter the RADIUS server IP address.                                                                                                         |
| Authorized Port | Enter the authorized port number. The default port is 1812.                                                                                 |
| Accounting Port | Enter the name you wish to use to identify this switch.                                                                                     |
| Key String      | Enter the key string used for encrypting all RADIUS communication between the device and the RADIUS server.                                 |
| Timeout Reply   | Enter the amount of time the device waits for an answer from the RADIUS server before switching to the next server. The default value is 3. |
| Retry           | Enter the number of transmitted requests sent to the RADIUS server before a failure occurs. The default is 3.                               |
| Server Priority | Enter the priority for the RADIUS server.                                                                                                   |
| Dead Timeout    | Enter the amount of time that the RADIUS server is bypassed for service requests. The default value is 0.                                   |

Click the **Apply** button ![](https://lh4.googleusercontent.com/XMTT8fQ_7-ZeiTvPvRukhv4L0AWct-vSxOhJ3FoFWDUz8lDDOjnB8z3TS4i_dfpCcqDBxi9QK4HLZqqmzieIB9UCQ1h53_LAGhePHU3Qf2lhtLDRweUMCw4lAm_zW7gnMjcOFfg) to accept the changes or the **Cancel** button ![](https://lh4.googleusercontent.com/jJmheoNlaq72LJAXVDSIwNSMs0tSJ8vbDx8UOLAI0IBsDdBZIIDh3GYCbel72dhgAeKuBGcf3SZ3GtC3LCTu9yuKIXTWrYmvZ9c6qgWAr1IfYNoN98KfsdWYobvrFEqGe7xpwYo) to discard them.<br>