What is the default frontend used by Zabbix on RHEL?

The default frontend used by Zabbix on RHEL is the Apache HTTP Server. This is significant because Apache has a long-standing reputation and support within the open-source community, making it a reliable choice for serving web applications like Zabbix. It seamlessly integrates with PHP, which is necessary for Zabbix's frontend to operate correctly.

In the context of Zabbix installation on RHEL, the configuration files and the installation scripts are typically set up with Apache in mind, ensuring that the web interface functions smoothly out of the box. This choice is likely based on Apache’s widespread usage and its comprehensive documentation and community support, which can be very helpful for users setting up Zabbix for the first time.

Thus, while other solutions like Nginx, Lighttpd, or using Php-fpm might be viable options for serving web applications in different contexts or configurations, Apache is specifically recognized as the default for Zabbix on RHEL, aligning with the intended ease of use and support for new deployments.