Apache is a free and open-source cross-platform web server software.
Limit Login Attempts Reloaded stops brute-force attacks and optimizes your site performance by limiting the number of login attempts that are possible through the normal login as well as XMLRPC, Woocommerce and custom login pages.
PHP is a general-purpose scripting language used for web development.
Unix is a family of multitasking, multiuser computer operating systems.
WordPress is a free and open-source content management system written in PHP and paired with a MySQL or MariaDB database. Features include a plugin architecture and a template system.