An easy, secure and reliable VPN solution. I've used this since 2013 on my ESXi server, with almost zero problems. Highly recommended.
"OpenVPN Access Server Virtual Appliance is a full featured secure network tunneling VPN virtual appliance solution that integrates OpenVPN server capabilities, enterprise management capabilities, simplified OpenVPN Connect UI, and OpenVPN Client software packages that accommodate Windows, MAC, and Linux OS environments. OpenVPN Access Server supports a wide range of configurations, including secure and granular remote access to internal network and/ or private cloud network resources and applications with fine-grained access control."
Downloads and more info: https://openvpn.net/index.php/access-server/download-openvpn-as-vm.html