Windows Server 2012 PowerShell Web Access

Windows PowerShell Web Access is a new feature in Windows Server 2012 that acts as a Windows PowerShell gateway, providing a web-based Windows PowerShell console that is targeted at a remote computer.

It enables IT Pros to run Windows PowerShell commands and scripts from a Windows PowerShell console in a web browser, with no Windows PowerShell, remote management software, or browser plug-in installation necessary on the client device.

All that is required to run the web-based Windows PowerShell console is a properly-configured Windows PowerShell Web Access gateway, and a client device browser that supports JavaScript and accepts cookies.

Quick Installation Guide;
Install-WindowsFeature -Name WindowsPowerShellWebAccess –IncludeAllManagementTools –Restart

Install-PswaWebApplication -UseTestCertificate
(valid for 90 days)

Add-PswaAuthorizationRule -UserName domain\username -ComputerName * -ConfigurationName *

Accessing Windows Powershell Web Access
https://hostname/pswa

More information can be found here, here and here.