VPN / Proxy

VPN vs Proxy

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OpenVPN

  • Open-source.

  • A VPN  is a service that protects your internet connection, while OpenVPN  is one of the tunneling protocols helping VPN services do that.

  • OpenVPN is one of the safest VPN protocols. It uses SSL/TLS to ensure data security and has access to the OpenSSL library for further customization, including additional security features.

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  • Flexibility :

    • Works on multiple platforms (Windows, macOS, Linux, Android, iOS).

  • Compatibility :

    • Can traverse firewalls and NAT (Network Address Translation).

  • Performance :

    • Can be tuned to prioritize speed (UDP) or reliability (TCP).

  • Security :

    • Implements SSL/TLS certificates for authentication and encryption.

  • Customizable :

    • Allows configuring specific rules for different network needs.

Encryption

  • Supports strong encryption algorithms like AES-256 to protect information.

Main Components

  • OpenVPN Server :

    • Usually located centrally, such as in the office or in the cloud.

    • Manages client connections and authentication.

    • Is the entry point to the private network.

  • OpenVPN Client :

    • Software installed on devices that want to access the private network.

    • Establishes the connection with the server.

Common Uses

  • Remote Access :

    • Employees can access corporate resources from anywhere in the world.

  • Online Privacy :

    • Users can hide their IP address and protect their connection on public networks.

  • Bypass Geographic Restrictions :

    • Allows access to content blocked in certain regions.

  • Interconnection of Networks :

    • Connects different physical networks, like company branches.

How to set up

  • Install the Server :

    • Install OpenVPN software on the server that will be the central point of the VPN.

    • Configure the required files (e.g., server.conf).

  • Generate Certificates :

    • Use tools like EasyRSA  to create a CA (Certificate Authority) and issue certificates for the server and clients.

  • Configure the Client :

    • Install OpenVPN on the client device.

    • Import the configuration file generated by the server (usually with .ovpn  extension).

  • Start the Connection :

    • Connect to the server using the OpenVPN client.