OpenTC

About

OpenTC is login portal for Remote Desktop Connections on Windows, it replaces the default shell and explorer.
It provides end-users with a closed environment, and prevents them from accessing features outside the Remote Desktop connection.
This project has been setup as a free and open-source alternative to professionalize using Thin Clients.

OpenTC Development

Features

• Provide a closed environment for the user dedicated to connect to one or multiple Remote Desktop farms or server.
• Prevents users from accessing the local desktop, start menu, and other Windows features.
• Add Remote Desktop environments for the user to choose from, by simply uploading .rdp files to the client.
• A support button provides users with useful information, like how to contact local support and computer specifications.
• Background image and logo are easily changable.
• Dynamically and easily be able to change settings, images, and language.
• The client can be remote controlled (shadowed) by administrators for support or administrative purposes.
• Administrators can still access the default desktop when needed.
• Lightweight (0% CPU, 10mb memory, 50kb storage).
• Free and open-source

Requirements

• Windows 7 or higher
• .NET Framework 2.0
• PowerShell 5.1 (for setup script)

Downloads

OpenTC v1.0:
OpenTC v1.0 Source Code:

Settings

The settings are stored in the registry under the key "HKEY_LOCAL_MACHINE\SOFTWARE\OpenTC".

Setting	Description	Value
Background	Path to the background image	e.g. "C:\Background.jpg"
Logo	Path to the logo image	e.g. "C:\Logo.jpg"
Language	Path to the language file	e.g. "C:\English.txt"
RDP	Path to the folder with the .rdp file(s)	e.g. "C:\RDP\"
Power	Power button behaviour	"Disabled", "Shutdown", or "Restart"

When using no full directory path, it will automatically look for the file or folder in the same directory as the executable.

Images

The background image will be shown on all monitors, and will be automatically stretched to fit the screen.
The logo image must be provided in 400x100 resolution.

Language

All translations of text and buttons are located in a text file. Language file 'English.txt' comes included.

Support

The text in the support dialog is changable by editing "HELPTEXT" in the Language file.
You can use these environment variables:

Variable	Result
\n	A new line
%HOSTNAME%	Hostname
%IP%	IP
%MAC%	MAC

You can hide the support button by changing the "HELP" text translation to be empty.

RDP

The Remote Desktop connections that the user can select from are all the .rdp files from the RDP folder.

Make sure the following settings have been applied for .rdp files:

Setting	Value	File Value
User name	yourdomainname\	"username:s:yourdomainname\"
Allow me to save credentials	Checked ☑	"prompt for credentials:i:0"
Display size	Full Screen	"screen mode id:i:2"
Display the connection bar when I use the full screen	Unchecked ☐	"displayconnectionbar:i:0"
Use my RD Gateway credentials for the remote computer	Checked ☑	"promptcredentialonce:i:1"
If server authentification fails	Connect and don't warn me	"authentication level:i:0"

Replace "yourdomainname" with the actual domain name of the remote computer.