How to Block VNC

Last Updated: June 29, 2021

VNC enables you to remotely access and control your devices from internal and external networks. It's very helpful when you want to remotely administer a computer. However, there are a few times when you would like to prevent somebody from accessing your computer and/or monitor what you are doing. Luckily, you can block VNC.

Method 1

Method 1 of 4:
Using the local computer firewall. (Windows)

1
Open Windows Firewall with Advance Security.
2
Click on Inbound Rules.
3
Click on New Rule.
4
Under Rule Type, select Ports. Click on Next.
5
Select TCP. Then enter the ports used by your VNC. Default is 5900 and 5800.
6
Select Block Connection. Hit Next all the way to the end of the wizard.

Method 2

Method 2 of 4:
Disable VNC Service

1
Open Services.MSC.
2
Look for VNC Server and hit Properties.
3
Stop the service. You may also select Disable service.

Method 3

Method 3 of 4:
Uninstall Completely

1
Go to Control Panel > Program and Features.
2
Uninstall the VNC program..

Method 4

Method 4 of 4:
Disconnect from the Network

1
Unplug your network cable physically from the computer.
2
Disable NIC. Go to Control Panel > Network Settings > Right click on your connection > Disable.