I have 10 mining rigs on my mining room. One of them has internet problem.
I see there is internet network and i can surf the web without any problem. But the miner software shows no internet connection from time to time.
I use Windows 10 x64 Pro Lite and SRB Miner 1.65
The rig has 11500 h/s with 12 x RX570 4GB. My avarage hashrate is 8100 h/s because of internet connection problem.
The other rigs has no problem. Only this one. I installed a fresh Windows but no solution.
problems do not appear when they are simple. Have you tried changing the catt cable between modem and pc? and if the result is the same, try SRB Miner 1.6.6 to see if you are experiencing the same problem. I hope you solve your problem as soon as possible.