Radius Server

Installing freeradius in Ubuntu 16.10:

sudo apt-get install freeradius

Edit the freeradius users:

sudo nano /etc/freeradius/users

Uncomment the user 'John Doe':

"John Doe" Auth-Type := Local, User-Password == "hello"
Reply-Message = "Hello, %u"

Test teh connectivity from local machine:

sudo radtest "John Doe" hello 127.0.0.1 0 testing123

Remote access to the radius server

sudo nano /etc/freeradius/clients.conf

And add the following snippet:

client 0.0.0.0/0 {  
  secret = "mysecret"
  shortname = name
}

Now from another machine, try the following:

radtest "John Doe" "hello" example.com 0 "mysecret"

{{#widget:DISQUS |id=networkm |uniqid=Radius Server |url=https://aman.awiki.org/wiki/Radius_Server }}