Enable remote desktop on domain controller

Assume a situation whereby you have just set up a remote site and now you find yourself having users or support servers that you can’t physically gain access. This means walking to the desk is out of your options. So how do you go about it to access the data and information you may be in need of?

To get it right, you need to figure out how to enable Remote Desktop via Group Policy, so that it can get applied to all devices at your site. Configuration of remote desktop forms the basis of our guide today. Let’s get started. 

What is Remote Desktop Group Policy

Almost all users who are interested in building safe connections between computers on the internet might have heard about RDP or VPN. RDP stands for the Remote Desktop Protocol. It is a network of communications protocol developed by Microsoft, to allow users to connect to another computer.

With RDP, one can connect to any computer that runs Windows. With RDP, you can connect to the remote PC, view the same display and interact as if you are working on that machine locally. 

Some instances where you may need to use RDP include;

• When traveling or when on vacation and you need to access your work computer
• When you can’t go to your office due to certain reasons and you still need to fulfill your daily tasks
• When you are a system admin and you need to perform administrative duties on your PC such as computer troubleshooting, tune-up, ID protection setting, printer set-up, software installation, email setup, virus and spyware removal, among others.
• When you need to give a demo and you need to access data from a private device
• When you want to personalize your remote desktop on experiences such as resolution, connection setting, screen setting, toolbar, start menu, icons among others.

How to Enable Remote Desktop Remotely on Windows 10

The easiest way to enable Remote Desktop on the Windows operating system family is to use a Graphical User Interface [GUI]. To do this, you need to;

Open the “System” control panel, go to “Remote Setting” and enable the “Allow remote connection to this computer” option in the Remote Desktop section. 

However, performing the above process will need local access to the computer on which you want to enable the RD. 

By default, remote desktop is disabled in both desktop versions of Windows and in Windows Server.

How to Enable Remote Desktop Remotely Using PowerShell

Suppose you want to remotely enable RDP on Windows Server 2012 R2/2016/2019. Here is the procedure to achieve the same;

1. On your computer, open the PowerShell console and run the following commands to connect to your remote server. Enter-PSSession -ComputerName server.domain.local -Credential domain\administrator.
2. You will have established a remote session with a computer and now you can execute PowerShell commands on it. To enable Remote Desktop, you need to change registry parameter fDenyTSConnections from 1 to 0 on the remote machine. Run the command; Set-ItemProperty -Path 'HKLM:\System\CurrentControlSet\Control\Terminal Server'-name "fDenyTSConnections" -Value 0
3. When RDP is enabled this way [as opposed to GUI method] the rule that allows remote RDP connections is not enabled in the Windows Firewall rules.
4. To allow incoming RDP connections in Windows Firewall, run the command; Enable-NetFirewallRule -DisplayGroup "Remote Desktop"
5. If for some reason the firewall rule is deleted, you can create it manually using the following commands. netsh advfirewall firewall add rule name="allow RemoteDesktop" dir=in protocol=TCP localport=3389 action=allow
6. In case you need to allow secure RDP authentication [NLA – Network Level Authentication] run the command; Set-ItemProperty -Path 'HKLM:\System\CurrentControlSet\Control\Terminal Server\WinStations\RDP-Tcp' -name "UserAuthentication" -Value 1
7. Now from your computer, you can check the TCP 3389 port on the remote host to see if it has become available. To do so, run the command below’ Test-NetConnection 192.168.1.11 -CommonTCPPort RDP.
8. If successful, you should get results similar to what is shown below’

The above results mean RDP on the remote host is enables and you can establish a remote desktop connection using mstsc client.

How to Enable/Disable Remote Desktop Using Group Policy

You can enable or disable remote desktop using group policy. To do so, perform the following steps

1. Search gpedit.msc in the Start menu. In the program list, click gpedit.msc  as shown below;
2. After Local Group Policy Editor opens, expand Computer Configuration >> Administrative Templates >> Windows Components >> Remote Desktop Services >> Remote Desktop Session Host >> Connections. 
3. On the right-side panel. Double-click on Allow users to connect remotely using Remote Desktop Services. See below;
4. Select Enabled and click Apply if you want to enable Remote Desktop. Select Disabled and click Apply if you need to disable it. 

Now you will have enabled or disabled remote desktop using group policy

Network Level Authentication NLA on the remote RDP server

Network Level Authentication is a method used to enhance RD Session Host server security by requiring that a user be authenticated to RD session Host Server before a session can be created.

If you want to restrict who can access your PC, you can choose to allow access only with Network Level Authentication [NLA]. NLA is an authentication tool used in RDP  Server. When a user tries to establish a connection to a device that is NLA enabled, NLA will delegate the user’s credentials from the client-side Security Support Provider to the server for authentication, before creating a session.

The advantages of Network Level Authentication is;

• It requires fewer remote computer resources initially.
• It can provide better security by reducing the risk of denial of service attacks.

To configure Network Level Authentication for a connection, follow the steps below.

1. On the RD Session Host Server, open Remote Desktop Session Host Configuration. To do so, click Start>>Adminstrative Tools1>>Remote Desktop Services>> Remote Desktop Session Host Configuration.
2. Under Connections, right-click the name of the connection and then click Properties.
3. On the General tab, select Allow the connection only from computers running Remote Desktop with Network Level Authentication checkbox
4. Click OK

Note, under step 3, if the “Allow connections only from computers running a remote desktop with network-level authentication” checkbox is not enabled, the “Require user authentication for remote connections by using network-level authentication” Group Policy setting has to be enabled, and has been applied to the RD Session Host Server.