• Install FreeRADIUS and MySQL module.

sudo apt-get -y install libdatetime-perl libdbd-mysql-perl libdigest-hmac-perl libdatetime-format-rfc3339-perl eapoltest
sudo apt-get -y install freeradius freeradius-mysql
# Answer yes to the question to install these packages with their dependencies
# Please note that the installation of this package generates some things that can take a lot of time on slower computers.

• Activating and starting FreeRADIUS

sudo systemctl enable freeradius
sudo systemctl start freeradius
sudo systemctl status freeradius

• Proceed as follows to configure FreeRADIUS to work with RADIUSdesk

# Stop the service if it is already running
sudo systemctl stop freeradius
# Backup the original FreeRADIUSdirectory
sudo mv /etc/freeradius /etc/freeradius.orig
# Extract the RADIUSdesk modified FreeRADIUS directory
sudo tar xzf /var/www/html/cake4/rd_cake/setup/radius/freeradius-radiusdesk.tar.gz --directory /etc
sudo chown -R freerad. /etc/freeradius/3.0/
sudo  mkdir /var/run/freeradius
sudo chown freerad. /var/run/freeradius

• Configure the site-wide shared secret. This is the value used by ALL dynamic clients.

sudo vi /etc/freeradius/3.0/sites-enabled/dynamic-clients

• Locate this part of the file and change FreeRADIUS-Client-Secret to the value you want to use.

#  Echo the IP address of the client.
FreeRADIUS-Client-IP-Address = "%{Packet-Src-IP-Address}"
 
# require_message_authenticator
FreeRADIUS-Client-Require-MA = no
 
# secret
FreeRADIUS-Client-Secret = "testing123"
 
# shortname
FreeRADIUS-Client-Shortname = "%{Packet-Src-IP-Address}"

• After you have completed these steps, restart FreeRADIUS.

sudo systemctl restart freeradius
sudo systemctl status freeradius

• There is a small bug that prevents FreeRADIUS from starting after a restart.
• It was reported here: https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=954911
• There also seems to be a fix, but it has not yet arrived in the Ubuntu repositories.
• So here is the solution from the discussion in the link
• Create a file called /usr/lib/tmpfiles.d/freeradius.conf

sudo vi /usr/lib/tmpfiles.d/freeradius.conf

• Add the following line

d /run/freeradius 750 freerad freerad -

• If you are curious about what we did, you can find a report on tmpfiles.d here
  • https://www.commandlinux.com/man-page/man5/tmpfiles.d.5.html

• You will need to make a few small adjustments to your environment
• Tweak Your Install