The NetScaler Secure Web Gateway (SWG) appliance is currently available as a hardware appliance and as a virtual appliance. Detail specifications are available in the data sheet, which is available on www.citrix.com. Hover the mouse pointer over Products, and in the Networking list, select NetScaler Secure Web Gateway.
Before you install your SWG appliance, ensure that you have the correct license(s). Each appliance in a high availability setup requires its own license. For information about the licenses, see License Requirements. For information about high availability, see http://docs.citrix.com/en-us/netscaler/12/system/high-availability-introduction.html.