I have configure freeradius following this tutorial.
But when I run a command
"freeradius -X"
I got the following error radiusd:
Opening IP addresses and Ports #### listen { type = "auth" ipaddr =127.0.0.1 port = 18120 Failed binding to auth address 127.0.0.1 port 18120 bound to server inner-tunnel: Address already in use /etc/freeradius/3.0/sites- enabled/inner-tunnel[33]: Error binding to port for 127.0.0.1 port 18120