I have created a CTF box as a cloud (Linode) instance. An Ubuntu server version was used for that. However, Metasploit exploit does not work because my Kali OS (which is in the physical computer) is not in the same network. (Port forwarding is not an option) I need to create an OpenVPN connection with the network of ubuntu server, so that every player is in the same network. Simply said, I need to achieve what we are doing in TryHackMe and HackTheBox platforms, where we use openvpn config file (eg:tryhackme.ovpn) to connect to TryHackMe / HTB network. Can anyone help me to achieve this?