Accessing a secured Hadoop cluster from an enterprise network

Typical deployment architecture of a secured Hadoop cluster in an enterprise context is shown in the following diagram:

The Corporate Network is firewalled with the Hadoop cluster and connectivity is only provided through the EdgeNodes (also also known as Gateway Servers). The Gateway Server allows an entry point for external applications, tools, and users to the secured Hadoop cluster. It is deployed between the Hadoop cluster and the corporate network. As all users log in to this machine and the credentials for the user defined in this machine are used while accessing the Hadoop cluster, this node can be used to provide access control, policy enforcement, logging, and gateway services to the Hadoop environment. Depending on the number of users accessing the Hadoop cluster, there could be more than one Gateway Server in a Hadoop cluster.

Clients in the corporate network can't directly access the Hadoop cluster. They log in...