.::: Install Freeradius 3 on Centos7/Redhat7, Redhat 8/ Centos 8 :::.

1. Disable SE Linux
[root@radius-teguht ~]# cat /etc/selinux/config | grep SELINUX=
# SELINUX= can take one of these three values:
SELINUX=disabled
[root@radius-teguht ~]#

2. Disable firewall
[root@radius-teguht ~]# systemctl stop firewalld
[root@radius-teguht ~]# systemctl status firewalld
● firewalld.service - firewalld - dynamic firewall daemon
   Loaded: loaded (/usr/lib/systemd/system/firewalld.service; disabled; vendor preset: enabled)
   Active: inactive (dead)
     Docs: man:firewalld(1)
[root@radius-teguht ~]#

.::: Install Openssl & Freeradius 3 using Source to other directory (/opt) :::.

default installation from yum (directory /etc/raddb})
exec=${exec:=/usr/sbin/$prog}
config_dir=${config_dir:=/etc/raddb}
config=${config:=$config_dir/radiusd.conf}
pidfile=${pidfile:=/var/run/$prog/$prog.pid}
lockfile=${lockfile:=/var/lock/subsys/radiusd}
using install from source from (directory /opt/freeradius3.0.17)
exec=${exec:=/usr/sbin/$prog}
config_dir=${config_dir:=/opt/freeradius3.0.17/etc/raddb}
config=${config:=$config_dir/radiusd.conf}
pidfile=${pidfile:=/opt/freeradius3.0.17/var/run/$prog/$prog.pid}
lockfile=${lockfile:=/opt/freeradius3.0.17/var/lock/subsys/radiusd}