Server will raise 403 Error "Access Denied/Forbidden" page, due to following reasons:

1. You have not uploaded any content to the website.
2. You are using a non-standard index file for your site's index.

You need to have any of the following default index file in your domain's root directory.

Windows Hosting
default.htm default.asp index.htm default.aspx index.asp index.aspx index.html default.html index.php welcome.htm welcome.html welcome.asp default.php _holding.asp _holding.htm

website root : /wwwroot

Linux Hosting
index.html index.htm index.shtml index.php index.php5 index.php4 index.php3 index.phtml index.cgi default.htm default.php welcome.htm welcome.html default.html index.jsp index.do

website root: /public_html

In linux you can also create .htaccess file under public_html directory and write following to make Default.htm as your Index Home Page.

.htaccess file content

DirectoryIndex Default.htm