When your are running your web server, it will process the request through the default http port, which has a numeric value of 80. The firewall rule was already enabled in the installation process. Now we need to know whether it's working fine.

We will perform a simple test by opening a web browser such as Internet Explorer and type the server IP address, http://127.0.0.1/, or http://localhost/ in the browser address bar and hit Enter to run the application. You will see the default IIS welcome page.

Look at this screenshot, which shows IIS 10.0 running on Server 2016.