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VPN TUNNEL is a free VPN that aims to overcome the barriers imposed by internet providers and governments, and guarantee privacy, freedom and anonymity to users.
The official servers available use a proprietary protocol we call VPN NETWORK, it is a simple protocol that protects the connection using TLS 1.3 (and TLS 1.2 optionally), the same used on HTTPS sites, with a self-signed certificate verified at the time of connection to avoid the interception.

To use it, you don't need any registration or payment, just a functional internet connection or knowledge to overcome your operator's restrictions in case your access is blocked.
It is also possible to use your own server through SSH, (Private Server option), in the standard method using port 22 (SSH standard), or with connection text and SNI if the server is prepared to receive these types of connections.