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JAF ODU SSH Access Via ADB

Disclaimer: This is ONLY for educational purposes, No one is responsible for any type of damage. So be aware.

NOTE: Works only for the models supporting ADB access.

Credits: @sumishimii

Prerequisites

Overview

The sshd binary exists on the JAF ODU at /usr/sbin/sshd. However, the root filesystem is read-only, which prevents modifying the sshd config directly or changing the root password, that's why I used SSH key-based auth to get access to the ODU.

⚠️ This method is not persistent and you'll lose ssh connection if the ODU is restarted. ⚠️

Steps to Enable SSH

Step 1: Generate an SSH key pair on your PC

You can leave the passphrase empty if you want.

  • On Linux/MacOS:

    ssh-keygen -t rsa -b 2048 -f ~/.ssh/id_rsa

  • On Windows:

    ssh-keygen -t rsa -b 2048

    The id_rsa.pub file can be found at %USERPROFILE%\.ssh\id_rsa.pub.

Once the keys are generated, copy the content of id_rsa.pub to the authorized_keys file in get-ssh folder of the cloned repo.

Step 2: Push the get-ssh folder using adb

Push the get-ssh folder of the cloned repo to the /tmp directory of the ODU using ADB.

adb push get-ssh/ /tmp/

Step 3: Run the run.sh script in adb shell

adb shell

In adb shell run the command

cd /tmp/get-ssh/ && chmod +x run.sh && ./run.sh

You can now SSH into the ODU either directly from it's IPv4 address if you are in (Router Mode/Bridge Mode/Connected to ODU directly) OR instead a better way to access the ODU ssh would be using SSH Tunnel which we use for accessing the ODU WEB-UI. Just change the destination ports from 443 to 22 and change 8443 to any free port on your (PC/local device) being used to access the ODU.

After establishing a SSH tunnel, proceed with the below command to access the ODU.

ssh root@localhost -P <whatever_port_you_used_instead_of_8443>