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This guide shows how to create an inbound Spacebridge tunnel to a device (e.g., Raspberry Pi) connected with a Hologram SIM. We will be using a Raspberry Pi in this example, but you can securely tunnel into any device that gives you port level access.

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Create a secure device tunnel

1

Ensure the device is online

First, make sure your end device has an open data session. Using a Raspberry Pi, you have a variety of choices on how to do that, for example ModemManager + NetworkManager, ChatScript, or the tool of your preference.
2

Establish the tunnel

Follow the SSH tunneling instructions to establish the tunnel. If you’ve already uploaded your keys (required once), then only you will only need to create the tunnel.

Establish a secure Spacebridge tunnel

3

Connect over SSH and close the tunnel

Once your tunnel is set up you can SSH into the device. In this case, it is a Raspberry Pi.
ssh pi@127.0.0.1 -p 5000
Secure tunnel using Spacebridge example
4

Close the tunnel using `Ctrl+C`

Enable/disable tunneling keys via API

View tunneling keys via API