Unable to Connect SSH to Jetson Nano: Tethering Issue

Introduction

In this article, we will discuss the issue of being unable to connect to SSH on a Jetson Nano using USB tethering with a phone connected to a network laptop (Arch Linux). This problem can occur for various reasons, and we will go through the steps to troubleshoot and resolve it.

Setting Up the Environment

To begin, let's ensure that the following prerequisites are met:

• Jetson Nano running Ubuntu 18.04
• Phone with USB tethering capability
• Network laptop running Arch Linux

The Issue: SSH Doesn't Work

When attempting to connect to the Jetson Nano via SSH from the network laptop, the following error message may appear:

 
 ssh: connect to host  port 22: Connection refused
 
 

Troubleshooting

Check Network Connection

First, check the network connection between the Jetson Nano and the network laptop. Ensure that both devices are connected to the same network. You can verify this by pinging the Jetson Nano from the network laptop:

 
 ping 
 
 

If the ping is successful, continue to the next step. If not, troubleshoot the network connection.

Check SSH Service

Next, check the status of the SSH service on the Jetson Nano:

 
 sudo systemctl status ssh
 
 

If the SSH service is not running, start it:

 
 sudo systemctl start ssh
 
 

Check Firewall

Check if the firewall is blocking the SSH connection. Open the firewall:

 
 sudo ufw allow OpenSSH
 
 

Check USB Tethering

Ensure that USB tethering is enabled on the phone and working correctly. Follow the phone manufacturer's instructions to enable USB tethering.

Check Network Settings

Verify that the Jetson Nano has been assigned a static IP address. This can be done by editing the /etc/network/interfaces file:

 
 sudo nano /etc/network/interfaces
 
 

Add the following lines:

 
 iface eth0 inet static
 address 
 netmask 255.255.255.0
 
 

Conclusion

In conclusion, when unable to connect to SSH on a Jetson Nano using USB tethering with a phone connected to a network laptop, troubleshoot the network connection, check the SSH service, firewall, USB tethering, and network settings. Follow the steps outlined in this article to resolve the issue.