please read here continue: https://github.com/mebels/zenphoto-adminarea-protect

Yes, you can protect any folder using .htaccess if you want to - if your server system does support it as for example IIS and Nginx don't but we don't test those regulary anyway– so zp-core is not special.

I only posted this here if anyone wants to use it.

Yeah, sure, just commented ;-)