Amazon EC2 - publishing your website security group and port setting

If you cannot successfully see your webpage on internet but able to see it in the local remote server like me, it's probably about the tcp port 80 has not been open to public in your security group that is assigned to your instance.

Now, go to the AWS Management Console.

At the initial setting, the Amazon setup for my server instance, the security group is assigned to 'quicklanuch-1' .

Then, click on 'Security Groups' under 'Network & Security' on the left panel.
you should find your security group name there.

Select your security group name, and you can find the 'Detail' tab and 'Inbound' tab in the bottom panel.

In the 'Inbound' Tab, Add a custom TCP rule with port 80, then enjoy!