[Unit]
Description=OpenVPN tunnel for %I
After=syslog.target network-online.target
Wants=network-online.target
Documentation=man:openvpn(8)
Documentation=https://community.openvpn.net/openvpn/wiki/Openvpn24ManPage
Documentation=https://community.openvpn.net/openvpn/wiki/HOWTO

[Service]
PrivateTmp=true
RuntimeDirectory=openvpn-client
RuntimeDirectoryMode=0710
WorkingDirectory=/etc/openvpn/client
ExecStartPre=/bin/sh -c 'grep -q -E ^daemon %i.conf || exit 0 && /usr/bin/echo "OpenVPN configuration cannot contain --daemon when being managed by systemd" ; exit 1'
ExecStart=/usr/sbin/openvpn --suppress-timestamps --nobind --config %i.conf
CapabilityBoundingSet=CAP_IPC_LOCK CAP_NET_ADMIN CAP_NET_RAW CAP_SETGID CAP_SETUID CAP_SYS_CHROOT CAP_DAC_OVERRIDE
LimitNPROC=10
DeviceAllow=/dev/null rw
DeviceAllow=/dev/net/tun rw

[Install]
WantedBy=multi-user.target