Indeed you can use Monit to monitor file and directory changes. I didn't suggest to use it for securing ISPConfig conrol panel in this thread since default perfect server tutorials do not cover Monit installation. Those who want to use Monit service will have to follow a separate tutorial for it. I also think it is safer (if not better) to use separate service like incron to monitor for file changes since securing Monit is part of this thread and LE4ISPC script. Lastly, I think scripting incron to be installed and then work automatically is little bit easier for me.