What are the default document extensions?

The default document extensions in order of rank are:
index.aspx
index.asp
index.php
Default.htm
Default.asp
index.htm
index.html
iisstart.htm
default.aspx

Please note that the above are listed in rank order. Therefore, if you have both an index.htm page and a default.htm page in a directory, then the index.htm will be shown as default because it is ranked higher. Similarly, if you have an index.asp page and a default.aspx page, then the index.asp page will be shown as default, because it is ranked higher.

We recommend only having one of the above default documents in your directories.

The default document settings can be changed from your control panel.