In your file “/etc/httpd/conf/httpd.conf” add a virtualhost and setup a landing page in your directory “/var/www/html/defaultsite”

NameVirtualHost :80
<VirtualHost default:>
DocumentRoot /var/www/html/defaultsite
</VirtualHost>

I have the same problem and the solution is: config your default site in 000-default.conf, and enable it, restart the apache2. Then the default site will be opened if you typed the IP address.

Hi I had the same problem once i used Apache2 in Debian, my solution was the following steps:

Step 1: Create a directory for your default web site, change the propietary of that dircetory and enable the virtual host with the following commands.

cd /var/www
sudo mkdir mywebsite
chown $USERNAME:www-data mywebsite
sudo a2ensite 000-default.conf

Step 2: Execute this command

sudo nano /etc/apache2/sites-available/000-default.conf

verify that file contains all this

<VirtualHost *:80>

    DirectoryIndex index.php index.html index.htm

    ServerAdmin webmaster@localhost
    DocumentRoot /var/www/mywebsite
    ServerName YOUR_DOMAIN_NAME.com
    ServerAlias www.YOUR_DOMAIN_NAME.com

</VirtualHost>

Step 3: create your index.php page and reload the service.

touch /var/www/mywebsite/index.php
systemctl reload apache2

Edit your index.php and add all your stuff. finally go to your web browser and type in the url localhost.