NethServer is an operating system for Linux enthusiasts, designed for small offices and medium enterprises
Extremely modular and feature-rich: MailServer and Filter, WebServer, Groupware, Firewall, Web Filter, IPS/IDS, VPN and more.
Powerful web interface that simplifies common administration tasks, very easy/fast installation and a lot of pre-configured modules installable with a “single click”
Based on CentOS/RHEL, a widespread and popular server distribution, trusted by routine security updates, and rock solid stability.
100% OpenSource, powered by contributors and fueled by community. Transparent with open communication channels and well documented.