How to configure freeradius with local users

OS: Debian9
Package: Freeradius 3.0
Hostname: srv1

This is step by step how to configure freeradius with local users (/etc/passwd)

In this scenario, I want to create 100 users with a password and no shell login to the system capability that can be done with the following commands:

for i in `seq 1 1 100`

do

useradd user$i

echo -e "P@ssw0rd\nP@ssw0rd" | passwd user$i

done

common-auth-radius  is for radius users

Edit like below:

And then configure no login with PAM pam_list_file in the /etc/pam.d/common-auth to limit login to the system

Only users in the /etc/loginusers can login to the system
Create a file loginusers in the /etc/

Because FreeRADIUS 3 no longer accepts "Auth-Type := System". It's by default use unix pasword so we want to just configure for client use like below:

/etc/init.d/freeradius restart

Testing in srv2, we need to install freeradius-utils for testing purpose, use radtest

Note:

Debug mode

/etc/init.d/freeradius stop

freeradius -X