I am not able to connect EC2 instance via VNC viewer. I am getting connection timeout error.
My VNC viewer version is 5.3.2. It shows field for VNC server where I put public DNS name of my EC2 instance followed by:5901 and for Encryption, I choose all the options but result is same. In practice guide it shows field for Address and picture quality field only.
I mentioned the port details under security group as mentioned in setup guide.