How to Set Up and Secure Admin RDP on Windows Server

Remote Desktop Protocol (RDP) is a powerful feature of Windows Server that allows administrators to access and manage servers remotely. When configured as Admin RDP, it provides full administrative control over a server, making it indispensable for IT professionals, businesses, and developers who manage multiple servers. However, exposing administrative access over the internet also poses security risks. In this article, we will guide you step-by-step on how to set up and secure Admin RDP on Windows Server, ensuring a safe and efficient remote management experience. For quality Admin RDP solutions, you can also check services like 99RDP.

What is Admin RDP?

Admin RDP is a Remote Desktop connection with administrative privileges on a Windows Server. Unlike a standard RDP session for regular users, Admin RDP allows you to:

• Install and configure software.

• Manage user accounts.

• Modify system and network settings.

• Access system files and logs.

• Perform server maintenance and troubleshooting.

This level of control makes Admin RDP an essential tool for server administrators but also a high-value target for hackers. Therefore, securing it is crucial.

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Step 1: Preparing Your Windows Server

Before enabling Admin RDP, ensure that your Windows Server meets the following prerequisites:

1. Updated Windows Server: Make sure your server runs the latest Windows Server version and updates. Security patches protect against known vulnerabilities.

2. Administrative Account: Use an account with administrator privileges to set up RDP. Avoid using the default Administrator account when possible; create a unique admin user.

3. Firewall Configuration: Verify that the Windows Firewall is enabled and properly configured to allow RDP traffic.

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Step 2: Enabling Admin RDP on Windows Server

Follow these steps to enable Remote Desktop:

1. Open System Settings:

   • Press Windows + R, type sysdm.cpl, and hit Enter.

2. Access Remote Settings:

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

3. Enable Remote Desktop:

   • Select Allow remote connections to this computer.

   • For higher security, check Allow connections only from computers running Remote Desktop with Network Level Authentication (NLA). NLA ensures the user authenticates before a full session starts.

4. Apply Settings:

   • Click Apply and then OK.

Once enabled, your server is ready to accept RDP connections.

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Step 3: Configuring Windows Firewall for RDP

By default, enabling RDP automatically creates a firewall rule. To verify or configure manually:

1. Open Windows Defender Firewall.

2. Go to Advanced Settings → Inbound Rules.

3. Find Remote Desktop (TCP-In) and ensure it’s Enabled.

4. If desired, restrict access to specific IP addresses:

   • Right-click the rule → Properties → Scope → Remote IP address → Add trusted IPs only.

Limiting access reduces exposure to unauthorized login attempts.

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Step 4: Creating a Strong Admin Account

Security starts with user accounts. For Admin RDP:

1. Create a new administrator account with a unique name.

2. Set a complex password:

   • At least 12 characters, combining uppercase, lowercase, numbers, and symbols.

3. Remove or rename the default Administrator account to minimize brute-force attacks.

4. Assign the account to the Administrators group.

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Step 5: Securing RDP with Network Level Authentication

Network Level Authentication (NLA) is a crucial security feature:

• Requires users to authenticate before establishing a full remote session.

• Reduces server resource usage during failed login attempts.

• Blocks unauthenticated attacks and brute-force attempts.

To enable NLA:

1. Go to System Properties → Remote tab.

2. Check Allow connections only from computers running Remote Desktop with NLA.

3. Apply changes.

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Step 6: Changing the Default RDP Port

By default, RDP uses TCP port 3389. Attackers frequently scan this port, making it a common target. Changing it adds a layer of security:

1. Open Registry Editor (regedit).

2. Navigate to:

   HKEY_LOCAL_MACHINE\System\CurrentControlSet\Control\TerminalServer\WinStations\RDP-Tcp\PortNumber
   

3. Modify the PortNumber to a value between 1025 and 65535.

4. Restart the server or the Remote Desktop Services service.

Note: Update firewall rules to reflect the new port.

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Step 7: Implementing Two-Factor Authentication (2FA)

Adding 2FA drastically improves Admin RDP security. Some popular options:

• Microsoft Authenticator: Integrates with Windows Hello for Business.

• Duo Security: Supports RDP with push notifications or OTP codes.

• Rublon: Offers RDP-specific 2FA solutions.

This ensures that even if your credentials are compromised, attackers cannot access the server without the second factor.

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Step 8: Using VPN for Admin RDP Access

Connecting via VPN limits RDP access to internal networks:

1. Set up a VPN server (Windows Server, OpenVPN, or commercial solutions).

2. Connect remotely through VPN before initiating an RDP session.

3. Disable direct RDP access from the public internet.

This creates a secure tunnel, shielding your server from external threats.

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Step 9: Enforcing Account Lockout Policies

Prevent brute-force attacks by setting account lockout policies:

1. Open Local Security Policy → Account Policies → Account Lockout Policy.

2. Configure:

   • Account lockout threshold: 5-10 invalid attempts.

   • Lockout duration: 15-30 minutes.

   • Reset account lockout counter: 15-30 minutes.

This blocks repeated login attempts and alerts you to potential attacks.

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Step 10: Monitoring and Logging RDP Activity

Continuous monitoring helps detect suspicious activity:

• Enable Windows Event Logging:

  • Go to Event Viewer → Windows Logs → Security.

  • Monitor login attempts and session activity.

• Use third-party monitoring tools to alert on failed logins or unusual activity.

• Regularly review logs for signs of unauthorized access.

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Step 11: Additional Security Best Practices

1. Regular Updates: Keep Windows Server and installed applications updated.

2. Antivirus and Anti-malware: Run real-time protection software.

3. Limit Concurrent Sessions: Restrict the number of simultaneous RDP connections.

4. Disable Clipboard and Drive Redirection: Prevent sensitive data leakage via RDP session features.

5. Regular Backups: Ensure server data is backed up in case of compromise.

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Step 12: Testing Your Admin RDP Setup

After configuration:

1. Test RDP access from a different network to ensure it works.

2. Verify NLA, VPN, and 2FA functionality.

3. Ensure firewall restrictions are enforced correctly.

4. Confirm logs are recording activity properly.

This ensures your Admin RDP is both functional and secure.

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Why Choose Professional Admin RDP Providers Like 99RDP

While you can configure Admin RDP yourself, using a trusted provider such as 99RDP offers additional advantages:

• Pre-configured Servers: Ready-to-use Admin RDP with Windows Server.

• High Security: IP whitelisting, VPN integration, and DDoS protection.

• High-Speed Connectivity: Low-latency connections optimized for remote management.

• 24/7 Support: Assistance with setup, troubleshooting, and security.

• Scalability: Easily upgrade server resources as your business grows.

Opting for professional Admin RDP ensures peace of mind and avoids potential security misconfigurations.

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Conclusion

Admin RDP is a powerful tool for managing Windows Servers remotely, offering full administrative control. However, the convenience of remote access comes with security risks if not properly configured. By following the steps outlined in this guide—enabling RDP, configuring firewall rules, implementing NLA, VPN, 2FA, and strong account policies—you can secure your Admin RDP connection effectively.

For businesses and individuals seeking a hassle-free solution with built-in security and high performance, professional services like 99RDP provide reliable Admin RDP servers that are ready to use, secure, and optimized for remote management.

With proper setup and vigilance, Admin RDP can transform how you manage servers, making remote administration safe, efficient, and reliable.