#centos stream 9
#Softethervpn

download latest stable version
tar xzf xyz.tar.gz
dnf groupinstall "Development Tools"
cd vpnserver
make
./vpnserver start

Registering a Startup Script: /opt/vpnserver.sh
chmod 755 /opt/vpnserver.sh
Create a systemd config file:
/etc/systemd/system/vpnserver.service
systemctl enable vpnserver