The SGD Gateway is a proxy server designed to be deployed in front of an SGD array in a demilitarized zone (DMZ). This enables the SGD array to be located on the internal network of an organization.
Using the SGD Gateway is the preferred alternative to running your SGD servers with firewall traversal, also called firewall forwarding. See Section 3.8, “Firewall Traversal”.
Using the Gateway has the following advantages, compared to using firewall traversal:
The Gateway can be deployed away from the SGD servers on the internal network.
All connections can be authenticated in the DMZ before any connections are made to the SGD servers in the array.
The Gateway manages load balancing of HTTP connections, so you do not need to use the JSP technology load balancing page included with SGD.
See About the SGD Gateway for more information about how to install and configure the SGD Gateway.