TP-Link TL-SG5426 User Guide - Page 314

4 Authentication Commands Command Usage • RADIUS uses UDP while TACACS+ uses TCP. UDP only offers best effort delivery, while TCP offers a connection-oriented transport. Also, note that RADIUS encrypts only the password in the access-request packet from the client to the server, while TACACS+ encrypts the entire body of the packet. • RADIUS and TACACS+ logon authentication assigns a specific privilege level for each user name and password pair. The user name, password, and privilege level must be configured on the authentication server. • You can specify three authentication methods in a single command to indicate the authentication sequence. For example, if you enter "authentication enable radius tacacs local," the user name and password on the RADIUS server is verified first. If the RADIUS server is not available, then authentication is attempted on the TACACS+ server. If the TACACS+ server is not available, the local user name and password is checked. Example Console(config)#authentication enable radius Console(config)# Related Commands enable password - sets the password for changing command modes (4-26) RADIUS Client Remote Authentication Dial-in User Service (RADIUS) is a logon authentication protocol that uses software running on a central server to control access to RADIUS-aware devices on the network. An authentication server contains a database of multiple user name/password pairs with associated privilege levels for each user or group that require management access to a switch. Command radius-server host radius-server port radius-server key radius-server retransmit radius-server timeout show radius-server Table 4-29 RADIUS Client Commands Function Mode Page Specifies the RADIUS server GC 4-74 Sets the RADIUS server network port GC 4-74 Sets the RADIUS encryption key GC 4-75 Sets the number of retries GC 4-75 Sets the interval between sending authentication requests GC 4-76 Shows the current RADIUS settings PE 4-76 4-73