Disable UDP for RDP

• Prevent UDP-based RDP Exploits: UDP is more susceptible to spoofing and reflection attacks. Disabling UDP can mitigate risks related to man-in-the-middle (MITM) and replay attacks.

• Protection Against DDoS Attacks: Some RDP-based attacks leverage UDP for amplification. Disabling it reduces attack vectors.

• Better Encryption Control: TCP-based RDP traffic is typically encrypted via TLS, while UDP-based traffic might have different security mechanisms.

Disable UDP for RDP using a single PowerShell command.

Run the following elevated PowerShell command (as Administrator):

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Set-ItemProperty -Path "HKLM:\SOFTWARE\Policies\Microsoft\Windows NT\Terminal Services\Client" -Name "fClientDisableUDP" -Value 1 -Type DWORD -Force

Verification:

To check if the setting was applied correctly, run:

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Get-ItemProperty -Path "HKLM:\SOFTWARE\Policies\Microsoft\Windows NT\Terminal Services\Client" -Name "fClientDisableUDP"

If it returns:

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fClientDisableUDP : 1

Then UDP is disabled for RDP.

Apply Changes:

For the change to take effect, restart your dedicated server or VPS.

Now, RDP will only use TCP and not UDP.