System Logging Protocol (Syslog) is a way network devices can use a standard message format to communicate with a logging server.
It was designed specifically to make it easy for administrators to monitor network devices, also review and manage those logs.
Starting from TOTPRadius v0.2.9, it is possible to send logs to a Remote syslog server. This can be configured in Settings → Remote syslog server 



 The syslog message contains information about user enrollment , authentication attempt, and admin’s activity . The server should be specified in IP_OR_FQDN:PORT format. Messages will be sent via UDP only. Set this value to "none" to disable the feature.

Message examples:

July 14, 2022, 02:33:56 token2 TOTPRadius; Radius authentication request from testuser01 ; Client IP: 192.168.0.104
July 14, 2022, 02:33:56 token2 TOTPRadius; Authentication attempt for testuser01 ; Return value: Reject
July 14, 2022, 02:49:43 token2 TOTPRadius; Authentication attempt for testuser02 ; Return value: Accept
July 14, 2022, 02:53:17 token2 TOTPRadius; Admin action: IP:192.168.0.104; admin/; table :users; action: insert 
July 14, 2022, 02:53:17 token2 TOTPRadius; Admin has added a user from the admin panel. Username: testuser03 

Local syslog log file

Even if a remote syslog server is not specified, a copy of syslog messages is kept on the appliance locally. This log can be accessed from Settings → User actions log