Skip to content

Bitcoin accepted at checkout  |  Ships from Laval, QC, Canada  |  Expert support since 2016

1325 Rue Bergar, Laval, QC support@d-central.tech 1-855-753-9997 Mon-Fri: 8:30 - 18:00

ANTMINER Security Firmwares Q&A

Start with safety and logs

Power down before opening a miner, label cables before moving boards, and capture logs before repeated reboots erase useful evidence. Record model, firmware, pool, uptime, fan speed, temperature, reject rate, chain count, and the exact error text.

Confirm the fault class

Separate configuration faults from hardware faults first. Pool errors, DNS failures, bad worker names, overheating, weak power, fan faults, and missing hashboards can look similar from the dashboard but require different fixes.

Document the test path

Change one variable at a time and keep the before/after result. Note cable swaps, PSU swaps, firmware changes, pool changes, fan replacements, ambient temperature, and whether the fault follows a hashboard, control board, network, or power source.

When to escalate

Escalate to professional repair when there is a burned smell, melted connector, breaker trip, corrosion, repeated hashboard loss, liquid exposure, or a board-level fault that returns after a basic cable, power, firmware, and airflow check.

After the fix

Run the miner long enough to confirm stable accepted hashrate, fan behavior, chip temperature, reject rate, and pool-side reporting. A dashboard that looks normal for five minutes is not enough evidence for a recurring power, heat, or hashboard fault.

· D-Central Technologies · ⏱ 2 min read

Last updated:

IMPORTANT: Please refrain from attempting to upgrade unauthorized firmwares from third parties, as this can result in miner malfunction and void your warranty immediately.

1. What is the security firmware?

The security firmware was specifically developed to protect ANTMINER users’ interests. This firmware maintains all the features of the previous version, while also disabling SSH access to effectively prevent illegal hacking attempts, block channels for virus transmission and remote attacks, and ensure the safety of your mining operations.

2. How can I distinguish the security firmware?

You can identify the security firmware in the following ways:

  • The security features are documented in the description on the firmware download page.
  • The security firmware file name ends with ‘sig’.
  • SSH access is disabled upon reloading the security firmware.

3. What are the functions of the security firmware?

The security firmware features firmware signatures and has SSH access disabled, making it different from regular firmware as you cannot use SSH connection.

4. Has SSH connection been disabled?

Yes, SSH connection is disabled by the security firmware.

5. What does it mean if the miner backstage shows “System Upgrade Failed – Cannot Find Signature!!!”?

This indicates that the firmware you are attempting to upgrade is not a security firmware.

6. Can I upgrade back to a previous version after reloading the security firmware?

No, you can’t. We always recommend upgrading to the latest official firmware from Bitmain’s website as it includes all the most recent features.

7. What ANTMINER models have the security firmware?

We are constantly updating the security firmware for more models. Please stay updated via our official website: https://service.bitmain.com.cn/support/download

So far, we have listed security firmwares for ANTMINER S17, T17, S17Pro, S15, T15, S9, S9I, S9J, L3+, DR5, and Z11.

If you have additional questions, please contact us for further assistance.

D-Central Technologies

Bitcoin Mining Experts Since 2016

ASIC Repair Bitaxe Pioneer Open-Source Mining Space Heaters Home Mining

D-Central Technologies is a Canadian Bitcoin mining company making institutional-grade mining technology accessible to home miners. 2,500+ miners repaired, 350+ products shipped from Canada.

About D-Central →

Start Mining Smarter

Whether you are heating your home with sats, building a Bitaxe, or scaling up — D-Central has the hardware, repairs, and expertise you need.

Browse Products Talk to a Mining Expert

Editorial review and limitations

Reviewed by D-Central's mining hardware and ASIC repair editorial team for practical accuracy, buyer risk, repair context, and operational assumptions. Verify current hardware price, stock, network difficulty, BTC price, power rate, shipping, tax, firmware, and device condition before buying, hosting, repairing, or retiring mining hardware.

Last reviewed September 15, 2024. D-Central, Laval, Quebec.

Related products, repair, and setup paths

Last reviewed September 15, 2024.