The Apache HTTP Server is a robust, commercial-grade open source Web server. Red Hat Enterprise Linux 6 includes the Apache HTTP Server 2.2.15 as well as a number of server modules designed to enhance its functionality.

Apache in Red Hat Enterprise Linux 6 features support for the Server Name Indication (SNI) protocol, which enables name-based virtual hosting over Secure Sockets Layer (SSL) connections. Additionally, support for the Web Server Gateway Interface (WSGI) has been added to Apache for this release, enabling the use of python web application frameworks that implement the WSGI standard.

PHP is an HTML-embedded scripting language commonly used with the Apache HTTP Web server. In Red Hat Enterprise Linux, PHP now supports the Alternative PHP Cache (APC).

memcached is a high-performance distributed object caching server that is designed to increase the performance of dynamic web applications by reducing database load. memcached is a new feature in this release, and provides bindings for C, PHP, Perl and Python programming languages.