I want to know that would the official Android OpenVPN client app "OpenVPN Connect" provides us an IP address of my Android 4.4.2 tablet so that I could ping it (or use it somehow) from my home OpenVPN server side.
I want a scenario that my Android tablet could be reachable from my home Ubuntu 12.04 amd64 server even when the tablet leaves my home (i.e. connecting through 3G/4G). So that I could install some servers (e.g. ftp, samba) in my Android tablet and reach these servers from my home Ubuntu server (assume I am sitting in my home and my Android tablet is holding by my friend).
I've heard that if I root my Android tablet and install the OpenVPN Linux client in it then I would achieve my proposed scenario. However, Android 4.0+ seems have introduced new API for VPN (VpnService). So I wonder that could a non-root Android 4.4.2 tablet achieves my scenario in a more easy way.
I am evaluating whether it is worth to install the OpenVPN server in my home Ubuntu computer. Does anyone have such experience to share.
Thanks in advance for any suggestion.