EC2 port for HTTP

In addition to the above, make sure your Security Group for the instance has rules for both ports to allow inbound traffic.

Hello.

If you are using a web server with IIS on a Windows server, please set the port number when adding a site using "Add a Web Site".
https://learn.microsoft.com/en-us/iis/get-started/getting-started-with-iis/create-a-web-site

In the case of Apache, this is possible by setting the listening port in the virtual host settings.
https://httpd.apache.org/docs/2.4/en/vhosts/examples.html