You can additionally purchase an Anti-virus Extension for $2.30 per user, per year and/or a Web Filter Extension for $4.80 per user, per year.
Anti-virus extension checks incoming files for viruses and malware
Web filter extension enables customers to block web sites or web site categories
GFI KerioControl available as a Hardware Appliance
Purchase GFI KerioControl as hardware with no limit on users, or as hardware with software licenses priced as above.
GFI does not put a license limit on users/devices connected to the appliance; customers will set their own operational limits to ensure they don’t overload the appliance. Price is payable per year. Comes available with all extensions noted above.