We are excited to announce a new SIM-Based Routing feature for Virtual Private Gateways (Type-F). This feature enables connecting directly to network devices that are located behind a cellular router by simply configuring a SIM's routing settings on Soracom.

Soracom's Virtual Private Gateway (VPG) is a network service that creates a dedicated private network for Soracom Air for Cellular devices and enables secure device-to-device communication. Devices connected to a VPG can be accessed by simply connecting to the SIM's private IP address (such as 10.x.y.z).

However, when the SIM is installed in a cellular router, connecting to the SIM's private IP address will create a connection to the router itself, rather than any network devices behind the router. A typical workaround is configuring port forwarding on the router (such as forwarding TCP connections on port 8080 to 192.168.1.x), but this workaround requires additional configuration each time a new network device is added, and may not work with certain types of applications or devices.

The SIM-Based Routing feature lets you associate the private network IP address range behind a router (such as 192.168.1.0/24) to a SIM. With this configuration, you can then connect to the network device's private IP address (such as 192.168.1.x, rather than the SIM's 10.x.y.z address), and the VPG will route the connection to the correct SIM.

With this feature, routing settings can be configured and managed centrally through Soracom, reducing the time and cost of network maintenance for devices connecting through IoT gateways and cellular routers.

SIM-Based Routing is available starting today for VPG Type-F.

For more information, please refer to the SIM-Based Routing documentation (Japanese).