VM (Absolute minimum, you may need to scale-up as usage increases) 
1 x vCPU 
1024 MB RAM 
10 GB HDD Storage
apt install -y freeradius | 
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vi /etc/freeradius/3.0/clients.conf | 
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| vi /etc/freeradius/3.0/users | |||
| some changes to the log (start around line 257) i did change so i know all loged user | |||
| vi /etc/freeradius/3.0/radiusd.conf | |||
| 352         auth_badpass = yes 353 auth_goodpass = yes  | 
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| # systemctl status freeradius.service | |||
| # systemctl stop freeradius.service | |||
| # systemctl start freeradius.service | |||
| # systemctl restart freeradius.service | |||
| # journalctl -xe | |||
| # freeradius -v | |||
| radiusd: FreeRADIUS Version 3.0.12, for host x86_64-pc-linux-gnu, built on Aug 10 2017 at 07:05:06 FreeRADIUS Version 3.0.12  | 
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| # multitail /var/log/freeradius/radius.log | 
| adding a second client | Process: 722 ExecStartPre=/usr/sbin/freeradius $FREERADIUS_OPTIONS -Cxm -lstdout (code=exited, status=1/FAILURE) Aug 22 07:13:33 radius-01 systemd[1]: freeradius.service: Control process exited, code=exited status=1 Aug 22 07:13:33 radius-01 systemd[1]: Failed to start FreeRADIUS multi-protocol policy server. Aug 22 07:13:33 radius-01 systemd[1]: freeradius.service: Unit entered failed state. Aug 22 07:13:33 radius-01 systemd[1]: freeradius.service: Failed with result 'exit-code'.  | 
Stackoverflow | 
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