The VMware Unified Gateway performs the same role as the view security server and is shown in the following diagram, but there's one key difference. Instead of being a Windows application and another role in the connection server, the Unified Access Gateway is a separate virtual appliance that runs a hardened, locked-down Linux operating system:
Although the Unified Gateway appliances deliver pretty much the same functionality as the security server, they do not yet completely replace it, especially if you already have a production deployment that uses the security server for external access. In that event, ...