Step 1 : Open New Port in Windows Firewall (IMPORTANT)
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Open Windows Defender Firewall
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Click Advanced settings
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Go to Inbound Rules
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Click New Rule
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Select Port → Next
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Select TCP
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Enter the new port number
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Allow the connection
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Apply to Domain / Private / Public
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Name it:
RDP Custom Port 3390(example)
Step 2 : Change RDP Port in Registry
- Press Win + R → type
regedit→ Enter
- Go to:
HKEY_LOCAL_MACHINE
└ SYSTEM
└ CurrentControlSet
└ Control
└ Terminal Server
└ WinStations
└ RDP-Tcp
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In the right pane, double-click PortNumber
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Select Decimal
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Change the port
Example:3389→3390(or any unused port like4444,5566)
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Click OK and close Registry Editor
Step 3: Restart RDP Service (or Server)
