Managing Panel Components

Panel orchestrates the work of a number of services like web, mail, DNS, and other. Technically, Panel does not provide the services by itself, it just gains control over a number of third-party components. For example, when a customer creates a website through the Panel GUI, Panel propagates this request to a web server (Apache or IIS) and the latter adds a new virtual host to the system. The list of components is defined during Panel installation (see the Installation, Upgrade, Migration, and Transfer Guide for details). Panel allows you to view the list of installed components, add new ones, switch between interchangeable components, and remove them (only on Windows).

Viewing Panel Components

You can view the list of installed components and their versions in Tools & Settings > Server Components. Panel for Windows has an additional indication of a component state (the appearance of icons depends on a Panel theme):

• means that Panel is using this component, and the component is working.
• means that Panel is not using this component (usually because a license key has expired or missing), but the component is working.
• means that Panel is not using this component, because the component is stopped.
• means that Panel is not using this component, but the component is installed in the system and available.

Installing Panel Components

If you did not include a component in your Panel installation, you can add it later in Tools & Settings > Updates and Upgrades > Add Components.

Switching Between Interchangeable Components

Some Panel components are interchangeable: For example, on Windows you can use either MS DNS Server or BIND as your DNS server, on Linux you can choose between Postfix and Qmail for mail delivery, and so on.

On Panel for Linux, you can switch between interchangeable components in two ways:

• Using service settings. Some Panel components with similar purpose can be installed side-by-side on the same Panel server. For example, if you have two installed antivirus components, you can specify the one that will process your mail in Tools & Settings > Mail Server Settings.
• Using Parallels Installer. Some Panel components with similar purpose do not allow side-by-side installation. For example, there may be only one mail server in Panel: Either Postfix or Qmail. In this case, you should choose one of the components in Tools & Settings > Updates and Upgrades > Add Components.

On Panel for Windows, you can switch between interchangeable components in Tools & Settings > Server Components. To perform the switch, click on the component name (for example, Mail Server) and select the required component from the list.

Removing Panel Components (Windows)

If you no longer need a certain Panel component, you can remove it from Panel in Tools & Settings > Updates and Upgrades > Add/Remove Components or by clicking the Add or Remove Components link on the Home page.

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