To establish a VPN in an OpenVZ container, some changes have to be performed in the host system, and most of these changes would require root access. Here are the steps:
1. Enable TUN/TAP in the OpenVZ Container: As root on the host machine:
\`\`\` vzctl set1. Install a VPN Server:
Once you had ensured that the necessary TUN/TAP support is enabled in the container, you can install a VPN server inside the container. You can choose between OpenVPN, IPsec VPN, Wireguard depending on your needs. For example, to install OpenVPN server, initiate the following commands: \`\`\` sudo apt-get update sudo apt-get install openvpn easy-rsa \`\`\`1. Configure the VPN Server:
Once the VPN software is installed, there would likely need to be editing of config files and the placement of certain encryption keys etc. Each VPN software would have different configurations, so following the official documentation for your chosen VPN software would be ideal.1. Start the VPN Server:
Finally, you would need to start the VPN server inside the container. This would be as simple as using a command like: \`\`\` service openvpn start \`\`\`Remember, since OpenVZ containers share the host system’s kernel, they are not completely isolated and cannot hold separate kernel modules. The only VPN protocols available are those that operate in user space, such as TUN-based VPNs like OpenVPN or SSL VPNs.
However, if the host system’s kernel isn’t configured to support TUN, you will not be able to use it inside any OpenVZ containers without the system administrator’s involvement. On commercial OpenVZ-based VPS hosting services, this usually is enabled by the provider.
Please contact your host if you are using a commercial hosting service, and you don’t have the necessary permissions to do these operations.
