Remote Desktop Protocol (RDP) is a convenient tool for remotely accessing your computer or server from anywhere in the world. Whether for work, IT administration, or personal use, RDP allows you to control your computer from another device. However, enabling RDP over the internet can expose your system to security risks, such as unauthorized access and brute-force attacks.In this article, we will guide you through the steps to enable RDP over the internet securely. We’ll discuss important security practices, configuration steps, and tools to help protect your system from potential threats.

Why Is Securing RDP over the Internet Important?

By default, RDP operates over port 3389, which is widely known and targeted by hackers. Exposing RDP directly to the internet without proper security can make your system vulnerable to a variety of threats:

• Brute-force attacks: Hackers use automated tools to guess your password and gain access to your system.

• Denial-of-Service (DoS) attacks: Attackers flood your system with traffic, rendering your RDP service inaccessible.

• Data interception: If your RDP connection isn’t encrypted, attackers can intercept your session and steal sensitive data.

By following the proper steps, you can minimize these risks and ensure secure remote access over the internet.

Steps to Enable RDP over the Internet Securely

To enable RDP over the internet securely, follow these essential steps:

Change the Default RDP Port

The default RDP port, TCP 3389, is widely known, making it a prime target for hackers. Changing the default port adds an extra layer of obscurity to your RDP setup.

•  Open the Registry Editor by pressing Windows + R, typing regedit, and hitting Enter.

•  Navigate to the following key: HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Terminal Server\WinStations\RDP-Tcp

•  Right-click on PortNumber, click Modify, and set a new port number between 1025 and 65535.

•  Restart your computer to apply the changes.

Remember, you will need to specify the new port when connecting via RDP, such as 192.168.1.100:newPortNumber.

Enable Network Level Authentication (NLA)

Network Level Authentication (NLA) adds an additional layer of security by requiring users to authenticate before establishing a remote desktop session. This can help prevent unauthorized access.

•  Open Control Panel > System and Security > System.

•  Click on Remote Settings on the left sidebar.

•  In the System Properties window, go to the Remote tab.

•  Under Remote Desktop, select Allow connections only from computers running Remote Desktop with Network Level Authentication.

•  Click Apply and OK to save the changes.

Set Up a Virtual Private Network (VPN)

A VPN provides a secure, encrypted tunnel for RDP traffic, preventing exposure to the public internet. Setting up a VPN ensures that only users with the proper credentials can access your system.

•  Set up a VPN on your router or use a dedicated VPN service.

•  Configure the VPN on the client devices that will access your system via RDP.

•  Once connected to the VPN, users can access RDP securely as if they were on a local network.

Configure Port Forwarding in Your Router

To allow external access to your RDP, you will need to configure port forwarding on your router. This process forwards the RDP traffic from the public internet to your local machine.

•  Log in to your router’s control panel (usually via a web browser using the router’s IP address).

•  Locate the Port Forwarding section.

•  Create a new rule that forwards the port you configured for RDP to the local IP address of the machine you want to access remotely.

•  Save the changes and restart your router.

Use a Firewall to Restrict RDP Access by IP Address

To enhance security, restrict RDP access by only allowing certain IP addresses to connect. This reduces the risk of unauthorized users attempting to access your system.

•  Open Windows Firewall by typing firewall.cpl into the Run dialog (Windows + R).

•  Go to Advanced Settings.

•  In the Inbound Rules section, click New Rule.

•  Select Port and enter the RDP port number.

•  Choose Allow the connection and select the Scope tab to specify allowed IP addresses.

•  Finish the wizard to create the rule.

Monitor RDP Connections

Regularly monitoring RDP activity can help you spot suspicious behavior and prevent unauthorized access.

•  Enable Remote Desktop logging via the Event Viewer.

•  Review the logs regularly for any unusual activity, such as failed login attempts or connections from unknown IP addresses.

Use Strong Passwords

Ensure that users accessing RDP have strong, unique passwords. Passwords should combine upper and lowercase letters, numbers, and special characters, and be at least 12 characters long.

Additional Security Measures

In addition to the steps above, consider these additional measures to improve RDP security:

• Enable two-factor authentication (2FA): Add an extra layer of security to RDP by requiring users to provide a second factor (such as a code sent to their mobile device).

• Use Remote Desktop Gateway (RD Gateway): RD Gateway encrypts RDP traffic and acts as a secure intermediary between clients and the internal network.

• Keep your system updated: Regularly install security patches and updates to fix known vulnerabilities.

FAQ – Frequently Asked Questions

 Can I use RDP over the internet without a VPN?
While it’s technically possible to use RDP over the internet without a VPN, it’s highly recommended to use one. A VPN encrypts your connection and adds an extra layer of security, preventing unauthorized access and data interception.

 Is changing the RDP port enough to secure my system?
Changing the RDP port is a helpful step, but it is not enough by itself to secure your system. You should combine port changing with other security measures like using NLA, setting up a VPN, restricting IP addresses, and using strong passwords.

 How can I prevent brute-force attacks on my RDP?
To prevent brute-force attacks, use strong passwords, enable Network Level Authentication (NLA), limit RDP access by IP address, and consider using two-factor authentication (2FA) for added security.

 How do I know if someone is trying to brute-force my RDP login?
You can monitor RDP login attempts through Event Viewer in Windows. Look for failed login attempts and repeated authentication failures. High numbers of failed attempts could indicate a brute-force attack.

 Can I access RDP over the internet securely without changing the port?
While changing the RDP port is a good security measure, you can still secure RDP over the internet by using a VPN, enabling NLA, and restricting access by IP address. However, it's still advisable to change the port to reduce exposure.

 Is there any other tool I can use to secure RDP?
You can use tools like Remote Desktop Gateway (RD Gateway), which encrypts RDP traffic and acts as an intermediary between the client and server. This adds an additional layer of security.

For more expert IT security solutions and advice, visit www.rossetaltd.com.