This document discusses how to configure a proxy server for .NET applications in two ways: 1) Setting up the proxy in the web.config file by defining the proxy address. 2) Using the WebProxy class to programmatically enable/disable the proxy and set credentials from the appSettings in web.config. Code examples are provided to test the proxy configuration from web.config and by handling it in code. The WebProxy class allows setting the proxy server IP/port and credentials to make requests through the proxy.