VPN Service

Bidirectional Connections between 1NCE SIM and Server Application.

In the 1NCE network infrastructure, a private IP address is assigned to each SIM card. If an IP communication is established from the customers device towards the open internet, Network Address Translation (NAT) is applied for the connection. To establish a connection from a customers application server to a device with a 1NCE SIM, the Virtual Private Network (VPN) Service has to be used to reach the private IP of the SIM card.

A VPN describes a technology that encapsulates and transmits Internet Protocol (IP) network data, over a separate network. Virtual Private Networks are commonly used to enable access to parts of a network that are otherwise inaccessible from the open internet. 1NCE uses the open-source implementation OpenVPN as the basis for the VPNService.

The Figure provides a high-level overview of the OpenVPN service. The VPN provides mutual communication between devices with a 1NCE SIM and their application server endpoints with the VPN client. The 1NCE VPN Service is enabled by default and the usage of this service is optional and free of charge. The following chapters of this guide will explain the Features and Limitations as well as the setup and usage of the 1NCE VPN Service.

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