[root@vpn system]# systemctl start openvpn@server.service
[root@vpn system]# systemctl status openvpn@server.service
● openvpn@server.service - OpenVPN Robust And Highly Flexible Tunneling Application On server
   Loaded: loaded (/usr/lib/systemd/system/openvpn@.service; enabled; vendor preset: disabled)
   Active: failed (Result: exit-code) since Thu 2017-11-16 18:46:58 EET; 7s ago
  Process: 2764 ExecStart=/usr/sbin/openvpn --cd /etc/openvpn/ --config %i.conf (code=exited, status=1/FAILURE)
 Main PID: 2764 (code=exited, status=1/FAILURE)
   Status: "Pre-connection initialization successful"

Nov 16 18:46:58 vpn.eurasia.local openvpn[2764]: Thu Nov 16 18:46:58 2017 /sbin/ip route add 10.8.0.0/24 via 10.8.0.2
Nov 16 18:46:58 vpn.eurasia.local openvpn[2764]: Thu Nov 16 18:46:58 2017 Socket Buffers: R=[212992->212992] S=[212992->212992]
Nov 16 18:46:58 vpn.eurasia.local openvpn[2764]: Thu Nov 16 18:46:58 2017 TCP/UDP: Socket bind failed on local address [AF_INET][undef]:1991: Permission denied (errno=13)
Nov 16 18:46:58 vpn.eurasia.local openvpn[2764]: Thu Nov 16 18:46:58 2017 Exiting due to fatal error
Nov 16 18:46:58 vpn.eurasia.local openvpn[2764]: Thu Nov 16 18:46:58 2017 /sbin/ip route del 10.8.0.0/24
Nov 16 18:46:58 vpn.eurasia.local openvpn[2764]: Thu Nov 16 18:46:58 2017 Closing TUN/TAP interface
Nov 16 18:46:58 vpn.eurasia.local openvpn[2764]: Thu Nov 16 18:46:58 2017 /sbin/ip addr del dev tun0 local 10.8.0.1 peer 10.8.0.2
Nov 16 18:46:58 vpn.eurasia.local systemd[1]: openvpn@server.service: main process exited, code=exited, status=1/FAILURE
Nov 16 18:46:58 vpn.eurasia.local systemd[1]: Unit openvpn@server.service entered failed state.
Nov 16 18:46:58 vpn.eurasia.local systemd[1]: openvpn@server.service failed.
[root@vpn system]#