https://www.tecmint.com/install-openvpn-server-on-zentyal/install-openvpn-in-zentyal-14/
Add New VPN Service in Zentyal | Tecmint: Linux Howtos, Tutorials & Guides
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https://zentyal.com/news/how-to-basic-install-overview-on-zentyal-6-0-on-virtualbox-video-tutorial
How-to: Basic install & overview on Zentyal 6.0 on VirtualBox (Video tutorial) | Zentyal News
Jeremy Leik has published a short video tutorial on how he carried out a basic Zentyal Server (v. 6.0) installation on VirtualBox for a testing environment
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