Imagine I've got a folder, within it are a lot of photos from the latest nude colony camping visit, and also the extravagant shots inside it and all sorts of, which i dont want just everybody to get access to when typing the primary folder e.g. www.website.org/photos/
While individuals who've direct link from the entire file, might have access:
www.website.org/photos/my_first_nude_colony_camp_visit_00281.jpg

Now, can there be any possibility, and when yes, what is the correct correct apache language, to achieve the following rules for this site using htaccess or any other magical forces:

RULE1: Automatically, block accessibility ftp-lookalike-free-file entries to every folder contents.

RULE2: When however a (hidden?) file named pass.port exists for the reason that folder, then do allow ftp-lookalike free listing of all of the contents.

This way I'm able to make exception that folders I wish to let BE visible, and which do not. Appreciate your clues and suggestions!

To disable files listing for that directory and all sorts of sub-sites supplment your .htaccess

Options -Indexes

To disable viewing files having a particular extension (for instance, .port) add

<Files ~ "\.(port)$">
Order allow,deny
Deny from All
</Files>