I want to power off an Antminer D3.

I have read online that the best way to do it is by connecting via ssh and executing poweroff.

However, I cannot login from my Mac to the miner with ssh -p 22 [email protected] or ssh [email protected].

It does not accept the default password "root":

Permission denied, please try again.

How can I log in and do I really have to shut down the miner this way? It makes sense to not turn off the fans immediately by unplugging the PSU.

1 Answer 1


Default password admin for user root worked.

  • They don’t really stop mining if you shut it down.
    – Claris
    Commented Dec 6, 2017 at 4:08
  • @eponymous why don’t they stop mining? What is shutting down then?
    – Manuel
    Commented Dec 6, 2017 at 12:31
  • 1
    You can turn off the control CPU but the mining chips are always connected to the power. I was imagining you were trying to schedule it’s usage.
    – Claris
    Commented Dec 6, 2017 at 13:01
  • @eponymous I intended to gracefully shut the miner down where the fans would still run some time after it stopped mining, so the chips don’t overheat.
    – Manuel
    Commented Dec 6, 2017 at 13:03
  • 1
    They’re designed for extremely high heat operation, there’s no danger in just unplugging it. It will probably happier with continuous operating rather than heating and cooling cycles.
    – Claris
    Commented Dec 6, 2017 at 13:04

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