Linux – How to prevent people from looking at a listing of files in parent directory if I haven’t uploaded index.html

The documentation for the DirectoryIndex directive includes the following:

Note that the documents do not need to be relative to the directory;

DirectoryIndex index.html index.txt /cgi-bin/index.pl

would cause the CGI script /cgi-bin/index.pl to be executed if neither
index.html or index.txt existed in a directory.

So, adding the following line in the appropriate places should do it:

DirectoryIndex index.html index.php /index.php

Tweak this to include support for whatever types of index files you want to be handled normally. As long as "/index.php" is the last one, it should do what you want.

RewriteEngine on
RewriteCond %{HTTP_REFERER} !^$
RewriteCond %{HTTP_REFERER} !^http(s)?://(www\.)?yourdomain.com [NC]
RewriteRule \.(jpg|jpeg|png|gif|swf)$ yourdomain.com/goaway.jpg [NC,R,L]