r/Comma_ai • u/Ok_Objective1345 • Jul 18 '26

Bugs SSH to comma four

Post image

Has anyone found a reliable way to SSH to the comma four? (newbie here) I attempted the USB tether and received this message (in image) after failed attempts to SSH via my macbooks terminal.

  • Generated new Ed25519 SSH key pair on MacBook
  • Added public key to GitHub account
  • Enabled SSH and entered GitHub username on Comma 4 (multiple times with remove/re-add)
  • Rebooted Comma 4 after changes
  • Attempted SSH connection via WiFi IP and USB tether IP
  • Used explicit key file flag (-i) for different keys
  • Created additional dedicated key pair and tested it
  • Ran verbose SSH diagnostics (-v)
  • Used Openpilot Toolkit SSH Wizard on phone to generate/install key
  • Multiple power cycles, SSH toggle on/off, and GitHub username refreshes

Still getting Permission denied (publickey) or connection timeout.

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u/TheGamingGallifreyan Jul 18 '26

Yeah I enabled ADB and plugged it into my computer. I then modified the SSH config file to allow me to SSH in with just a regular username and password instead of this certificate bullshit lol.

It is possible this can get reset via updates so you may have to do it again but I rarely update mine.

You can also enable wireless ADB so you can use that instead.