Web Filtering Proxy for Microsoft Windows is a web filtering proxy and secure web gateway for Microsoft Windows. It can decrypt HTTPS traffic, filter HTTP requests and responses and inspect contents of HTML pages. The product deployed as a network service in Microsoft Windows and is managed by using Microsoft Management Console.
See https://github.com/boostorg/build/commit/aaf14325ec8e3ca86be9afaa501bca68fcfea8b3 and https://github.com/boostorg/boost/issues/914