The forum index page by default is index.php; just install your board in your site's root directory (i.e., domain.tld/), and the index.php will be your homepage as well (unless there are already existing index.* files in that same folder, which may take precedent).
As for the index.html files contained in all of phpBB's subfolders, I replaced them with something a bit more functional: index.php files which contained a redirect back to my board's index. That way, not only can't people get my directory listings, they will simply land back at the home page for their troubles.
If you'd like to do the same, the contents of each index.php file (except for those in the root and /admin/ folders) is as follows:
Code: Select all
Just make sure that the address is changed to reflect your home page's.