Webmin

Webmin is a web-based system administration and configuration tool for Linux and Unix based server systems. Mostly written in Perl language, Webmin comes with its own web server with optional SSL for web-based server configuration. Webmin allows one to configure a variety of server components, including start-up services, firewall rules, routing settings, filesystem mount, scheduled cron jobs, system logs, users and groups, and other open source server applications. Its core functionality can be extended by using third-party modules, which include IPsec VPN configuration, Kerberos5, LDAP, GRUB boot loader management, and much more.