NethServer is highly modular: at the end of the installation only base system will be ready to be used. Base system includes modules like network configuration and log viewer. The administrator can install additional modules like Email, DHCP and PXE server and Firewall and gateway.
The main page shows all available and installed (checked) modules. The view can be filtered by category.
To install a module, check the corresponding box and click on Apply. To remove a module, uncheck the corresponding box and click on Apply. Next page will resume all modifications and display all optional packages.
Optional packages can be added to the system after installation of the main component. Just click again on Apply and select optional packages from confirmation page.
The section Installed software displays all packages already installed into the system.