Enabling debug mode requires restarting RADIUS.

1. Enable the FreeRADIUS control-socket:

ln -s /etc/raddb/sites-available/control-socket /etc/raddb/sites-enabled/

This module allows the RAdmin administration tool to work.

1. Configure RAdmin write permissions in /etc/raddb/sites-available/control-socket:

mode = rw

Possible values:

• ro = read-only access (default)
• rw = read and write access

1. Verify that the module is added to the main config:

ls -la /etc/raddb/sites-enabled/

1. Restart radiusd:

systemctl restart radiusd

1. Open RAdmin:

radmin

1. Logging is written to the directory defined in /etc/raddb/radiusd.conf, by default it is radius.log
2. Enable debug mode

debug level 4

The logging verbosity can be set from 0 (disable logging) to 4 (debug mode, similar to radiusd -X).
Important! Even with logging level 1, debug mode generates a large number of logs, so it is not recommended to keep logging enabled for a long time to avoid filling system storage.

1. Select a file for writing logs:

debug file [filename]

Commands must be entered sequentially; they cannot be used simultaneously as in: debug level 3 debug file [filename]

1. If an error occurs after restarting radiusd or when attempting to connect to RAdmin — check whether the socket /var/run/radiusd/radiusd.sock exists and what permissions are assigned to it.
   

If there are no access permissions (default is radiusd) — change the gid and uid parameters to "root" in /etc/raddb/sites-available/control-socket.

• uid — the user name allowed to connect to the control socket.
• gid — the group name allowed to connect to the control socket.