Enable OpenVPN Log and Add Timestamp in Log

How to Configure OpenVPN 2.4.4 on Ubuntu 18.04.

1. Configure OpenVPN Configuration File

$ sudo bash
# vim /etc/openvpn/server/server.conf

log /var/log/openvpn.log

2. Enable OpenVPN Log Rotation

# vim /etc/logrotate.conf

/var/log/openvpn.log {
    missingok
    weekly
    compress
    rotate 8
}

3. Configure OpenVPN Launch File

# vim /etc/systemd/system/multi-user.target.wants/openvpn-server@server.service

# Removed "--suppress-timestamps" as the below
ExecStart=/usr/sbin/openvpn --status %t/openvpn-server/status-%i.log --status-version 2 --config %i.conf

# systemctl daemon-reload
# systemctl restart openvpn-server@server.service

Reference:

• https://bbs.archlinux.org/viewtopic.php?id=224199