You can find index.html file in: /usr/local/ispconfig/server/conf/index/ There you can find all the index files in different languages. In your case the name of the file is standard_index.html_en
Ah, not quite what I was after, but good to know. I mean, but default, apache is only looking for index.htm files. How do I add, index.html or rearrange the order?
Thsi is set in your apache configuration file (apache2.conf or httpd.conf) and not in ispconfig. Look for the line "DirectoryIndex".
It wasn't in either. By doing a bit of googling, I found it in: /etc/apache2/mods-enabled/dir.conf DirectoryIndex index.htm index.html index.cgi index.pl index.php index.xhtml index.htm