WatchGuard XCS reached End of Life (EOL) reached end of life December 2018. WatchGuard proffers they offer multiple solutions, including migration to a WatchGuard Firebox UTM.
I suggest WatchGuard because they offer so much. They offer the way to keep email and websites blocked that don't belong and they also help us connect to the server whenever we remote in from work. Everything is done with so much ease and there is not any hassle.