Because the system is running on windows with less security, if the HACKER has access to windows what it ก้ได้ to the server, Therefore, in order to prevent threats, so eager to offer customers install the firewall device.
The system works on windows secured at least, if HACKER into windows, it can do what I did with the server, so as to prevent the threat it would offer customers installing firewall.
Since the system running on Windows secure less,. If HACKER into windows can do whatever you want with server,, So, to prevent the threat is to offer customers equipped firewall.