My question is how do I configure an Antminer S9 to connect to bfgminer to mine to Bitcoin Core.
My current S9 settings are:
URL:
http://127.0.0.1:3333worker:btc
password: !@##$$%%
Why are you using 127.0.0.1 as your URL, this will redirect the miner to itself, you need to use the IP address of the machine that hosts your node, you also need to check if port 3333 is the correct port set on your miner software.
Is this for experimental purposes? because it would be a terrible idea if you are doing this as a business or even as a hobby.