Please check the following:
- Is the remote computer powered on and awake (that is, not asleep or in hibernation)?
- Is VNC Server running on the remote computer?
- Is VNC Server licensed?
VNC Server should be functioning correctly if there is a green tick (and no error messages) displayed in its Status dialog:
See this page for a full list of error messages you may see as a connecting user.
Cloud connections
If you have a Home or Professional subscription, or an Enterprise subscription and you are establishing a cloud connection:
- Are you signed in to VNC Viewer on the device you want to control from?
- Are both endpoints connected to the Internet, and able to communicate with RealVNC services?
- Is RealVNC’s connectivity service working?
- Have you checked the most common reasons?
Direct connections
If you have an Enterprise subscription and you are establishing a direct connection:
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Have you entered the remote computer’s IP address or hostname into VNC Viewer correctly, including a port number if required?
If VNC Server is not listening on port 5900, enter:<1-99>for ports in the range 5901-5999, for example192.168.5.127:80for port 5980, and::<full-number>for all other ports, for example192.168.5.127::80for port 80. -
If you’re connecting over the Internet, have you entered VNC Server’s public rather than private network address?
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If you’re connecting over the Internet, have you configured the remote computer’s firewall and router properly?
Still can't connect?
If you have a Professional or Enterprise subscription and still can’t connect, please contact Support.
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