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Install OpenVPN on your server, by using a tutorial like this one: https://www.digitalocean.com/community/tutorials/how-to-install-openvpn-access-server-on-ubuntu-12-04
And then install the OpenVPN client on your phone and laptop to connect to it.
Most firewalls block things like that by looking at the port, so I suggest configuring OpenVPN to listen on a common port such as 443 (HTTPS) or 53 (DNS) and trying to connect to it then.