I am interested to see some tech tips on how to make your mining network less prone for attacks. How hackers find them? Should I separate it from my home network? Can it be a switch or I have to have totally independent internet connection etc..
If youre just mining with a couple of units, you should be fine behind a normal SOHO grade router / firewall. Be careful not to open up any weird ports coming in on the router (Port forwarding, virtual server etc.). The less doors that are open, the less likely it will be for a hacker to fund their way into your network.
If you've secured your internet connection, the next easiest way for an attacker to get to your miners would be to compromise one of your laptops / desktops / phones that have access to the same network and use them to access your miners. An easy way to avoid this would be to separate your mining network from your home network. You can add a second router 'down stream' from your first one and use it to connect your mining equipment. This second network would treat your house network as if it were the internet (WAN) and would keep most access / ports closed (you could even disable wifi if you want since it wont be needed). This will limit your ability to manage the miners from devices in your house that aren't part of that mining network. Keeping an old laptop or desktop isolated with the miners would be an option to make that a bit easier.
Security is always a trade off with convenience.