NAT can be configured in various ways. In the example below, the NAT router is configured to translate unregistered (inside, local) IP addresses, that reside on the private (inside) network, to …
Enable NAT on Windows Server 2008 R2 | ITGeared.com May 23, 2012 NAT & Proxy Server - YouTube Feb 24, 2015
In this tutorial, you'll create a NAT gateway to provide outbound connectivity for virtual machines in Azure. To test the NAT gateway, you deploy a source and destination virtual machine. You'll test the NAT gateway by making outbound connections to a public IP address from the source to the destination virtual machine.
NAT is short for Network Address Translation.NAT is an Internet standard that enables a local-area network (LAN) to use one set of IP addresses for internal traffic and a second set of addresses for external traffic. After you have launched a NAT instance and completed the configuration steps above, you can perform a test to check if an instance in your private subnet can access the internet through the NAT instance by using the NAT instance as a bastion server.
secure NAT is used by F5 Networks and by Microsoft  (in regard to the ISA Server) Microsoft's Secure network address translation (SNAT) is part of Microsoft's Internet Security and Acceleration Server and is an extension to the NAT driver built into Microsoft Windows Server.
NAT & Proxy Server - YouTube Feb 24, 2015 Routing with NAT traversal and UPnP