PowerShell Web Access

HTTP(S) is new TCP;
Firewalls and routers block protocols, and then they get around by using web server proxy apps.

Basic installation guide for Windows PowerShell Web Access - Windows PowerShell Blog - Site Home - MSDN Blogs
"Windows PowerShell Web Access is a new feature in Windows Server 2012. It is an IIS application that provides a Windows PowerShell console in a web browser. The IIS application acts as a gateway between the web browser and the machines that you can connect to in your environment. These machines should have Windows PowerShell remoting enabled."

Install and Use Windows PowerShell Web Access