ISPConfig

ISPConfig is an open-source hosting control panel for Linux that provides a web-based interface to configure and administer web hosting services on one or more servers. Administrators can manage client accounts, websites, mail, DNS, databases, and FTP from a single interface.

Key features include support for multiple web servers (Apache and Nginx), management of websites and domains, secure SSL via Let’s Encrypt, mail services using Postfix and Dovecot, DNS servers such as BIND or PowerDNS, and databases (MySQL/MariaDB and PostgreSQL). It also provides FTP/FTPS, backups, quotas, and reseller capabilities, enabling hosting providers to partition resources and offer customer sub-accounts.

Architecture and installation: ISPConfig runs on Linux distributions such as Debian, Ubuntu, and CentOS. It uses a central web-based control panel that stores configuration in MySQL/MariaDB and communicates with services on the same or remote servers. A one-click installer configures the required packages and services and can be used to set up multi-server environments, where a primary server administers other servers via SSH.

Licensing and history: ISPConfig is released under a BSD-style license and has been actively developed by a community of volunteers and contributors. The project is widely used by small to medium-sized hosting providers and system administrators who require a unified interface to manage multiple hosting services.