RADIUSdesk

Installing FreeRADIUS version 3.x on Ubuntu 20.04

Introduction

  • Ubuntu 20.04 now comes with a FreeRADIUS 3.x release.
  • Install FreeRADIUS and MySQL module.
sudo apt-get install libdatetime-perl
sudo apt-get install freeradius freeradius-mysql
# Answer yes to install these with their dependencies
# Please note that when this package is installed there are some things generated that can take up lots of time on slower machines.
  • Enable and Start FreeRADIUS
sudo systemctl enable freeradius
sudo systemctl start freeradius
sudo systemctl status freeradius

Configuring FreeRADIUS version 3.x

  • Do the following to configure FreeRADIUS 3.x 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/cake3/rd_cake/setup/radius/freeradius-3-radiusdesk.tar.gz --one-top-level=/etc/freeradius/
sudo mv /etc/freeradius/freeradius /etc/freeradius/3.0
sudo chown -R freerad. /etc/freeradius/3.0/
sudo  mkdir /var/run/freeradius
chown freerad. /var/run/freeradius
  • Configure the site-wide shared secret. This will be the value used by ALL Dynamic Clients.
sudo vi /etc/freeradius/3.0/sites-enabled/dynamic-clients
  • Look for this part in the file and change FreeRADIUS-Client-Secret to the value you choose 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}"
  • Comment out the following two lines in the Systemd unit file
sudo vi /lib/systemd/system/freeradius.service
  • See this sample to see which two lines to comment out. Failing to do this will result in a broken system with FreeRADIUS not starting up during boot
[Unit]
Description=FreeRADIUS multi-protocol policy server
After=syslog.target network.target
Documentation=man:radiusd(8) man:radiusd.conf(5) http://wiki.freeradius.org/ http://networkradius.com/doc/
 
[Service]
Type=forking
PIDFile=/run/freeradius/freeradius.pid
#EnvironmentFile=-/etc/default/freeradius
#ExecStartPre=/usr/sbin/freeradius $FREERADIUS_OPTIONS -Cxm -lstdout
ExecStart=/usr/sbin/freeradius $FREERADIUS_OPTIONS
Restart=on-failure
RestartSec=5
 
[Install]
WantedBy=multi-user.target
  • After you completed these commands you can test if FreeRADIUS starts up fine.
sudo systemctl daemon-reload 
sudo systemctl restart freeradius
sudo systemctl status freeradius

Fixing a small bug

  • There is a small bug which prevents FreeRADIUS to start up after a reboot.
  • There also seems to be a fix but it has not reached the Ubuntu repositories as of this writing.
  • So here is the fix taken 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 -

Add Nginx to run scripts

  • To create the ability for the web server to exercise some control over FreeRADIUS, we will have a custom script which is added to the sudoers file.
  • The correct way to edit the sudoers file is by using:
sudo visudo
  • Add the following at the bottom
# Members of the admin group may gain root privileges
%admin ALL=(ALL) ALL www-data ALL = NOPASSWD:/var/www/html/cake3/rd_cake/setup/scripts/radmin_wrapper.pl
  • Confirm that this line is now inside the /etc/sudoers file
sudo cat /etc/sudoers
  • This will allow the root user in RADIUSdesk to Start and Stop FreeRADIUS service and do on-the-fly activation of debug traces.