VNC Connect Error Messages – RealVNC Help Center
help.realvnc.com › hc › en-usAug 15, 2019 · Ensure VNC Server is running. If you are establishing a direct connection and have specified a port other than the default for VNC (5900), ensure VNC Server is configured to use that port. Connection rejected by VNC Server computer user. VNC Server is configured to require the remote computer user to manually accept or reject connections, and ...