To enable basic hosting services and functions on a Plesk server, Plesk distribution package includes several third-party software applications, also referred to as third-party Plesk components (Plesk components), that need to be installed along with Plesk. Plesk components are ultimately responsible for providing various hosting services such as DNS, e-mail, FTP, and others.
Hosting providers can also install and manage through Plesk many other third-party applications that are not included in the Plesk distribution package. For the complete list of third-party applications currently supported by Plesk, see "Third-Party Applications Supported by Plesk".
Plesk supports management of Plesk components by control panel administrators by integrating with the applications and providing GUI tools to perform routine application management tasks. A Plesk-supported third-party application installed on a Plesk server is said to be integrated with Plesk if Plesk can access and manage the application.
This chapter provides necessary background information and complete instructions for installing and upgrading Plesk components.