Is there any tutorial for remote control, because I can't manage to conect to my workers even with firewall off 
Try here https://fah-web.stanford.edu/projects/FAHClient/wiki/RemoteClients
Already tried this one but I can't get it to work...
managing 20+ rigs with teamviewer is a pain in the ass, I want to be able to switch from folding to mining instantly...
Make sure to enter the same password on the remote client configuration you want to access to and also in the FAHClient on your workstation.
Can you reach via ping ?