How to Connect an Antminer S21 to MySoloPool for Solo Mining (Step by Step)

Goal: Point an Antminer S21 (or other Bitmain SHA-256 miner) at MySoloPool so it submits work toward a solo block while you keep the full reward if you find one. Always double-check pool URLs on mysolopool.com/getting-started before saving—operators can update ports.

What you need beforehand

• Miner powered and connected to your LAN
• Computer on the same network
• A Bitcoin address you control (payout destination)
• Optional: static IP or DHCP reservation for the miner

Step 1 — Find the miner on your network

Use MINER-IP as discovery tool. Open the miner IP in a browser (default login is often root/root— or admin/admin).

Step 2 — Open the pool configuration tab

In the Bitmain UI, go to Miner Configuration or Pool Settings. You will see three pool priority slots.

Step 3 — Enter MySoloPool Stratum details

Typical pattern (verify on the official page):

• URL: stratum+tcp://btc.mysolopool.com:3334 (or the alternate port listed by the pool)
• Worker: your Bitcoin address
• Password: x for automatic VarDiff, or a fixed difficulty if the pool documents one

Set the same pool in backup slots with the secondary port if provided, or leave backups empty.

Step 4 — Save and restart

Click Save & Apply, then power-cycle if the UI does not restart hashing automatically.

Step 5 — Verify shares and hashrate

Within a few minutes you should see accepted shares locally. On MySoloPool, use the dashboard search with your BTC address to confirm the worker appears online.

Pro tip: Watch reject rate and chip temps first; a unstable LAN cable causes more “lost luck” than pool choice.

If something fails

• Ping the pool hostname from your network
• Confirm firmware is not blocking nonstandard ports
• Try the alternate Stratum port from the official docs
• Buy replacement hardware or hosting from Hashrate Farm if the unit is faulty

Related Resource

Solo Pool Setup Guide: Stratum URL, worker format, and vardiff settings for ASIC miners.