There are several possible causes for this, including:
- You have a keylogger on the system that you use to configure the miner. Every time you change the password, it's captured by the keylogger and sent to the attacker.
- The OS on the RPi has a security vulnerability that can be exploited.
You should first figure out how the attacker is gaining access. If it's through a keylogger on your system, then just slapping a firewall in front of the miner isn't going to do anything.
The biggest problem is if you have been using a standard password in the beginning as had the machine accessible globally via internet.
You will have to reset to factory settings as most probably you have malware on it.
--- I SHOULD MENTION - The Raspberry Pi device is attached to the ethernet cable straight from the cabinet -- there is no router / firewall currently. Just a static IP on one line ...
Basically - I'm looking for advice on how to set up a firewall device -- what Exactly to purchase and how to configure it.. Seriously - any suggestions or advice is welcome.
As to the other poster - I do not have any keyboard or monitor hooked up to the miner or raspberry pi -- I bring a monitor and keyboard when I go to the NOC (Hosting facility) --
Hi - The ORIGINAL SD Card with MinePeon installed did have the default password. Once I was hacked (the first time) - I switched out an ENTIRELY NEW SD Card with MinePeon reinstalled -- with a VERY secure password (25 char+) -- The Hacker is back -- and seems to have broken that one too.
The Butterfly miner that I purchased originally came with an android tablet interface - but the seller replaced that with this Raspberry Pi device because it works better. And it does, and I truly trust the seller - he has bent over backwards to get me up and mining --- as well as advice and an education. I truly do not believe it is him.
Thank you!