Zentyal - Linux Small Business Server
Zentyal is a Linux Small Business Server, good alternative Windows Business Server. Zentyal can act as a Gateway, Infrastructure Manager, Unified Threat Manager, Office Server, Unified Communication Server or a combination of them. It is built on Ubuntu Linux distribution. This package includes LDAP server, Mail server, Firewall, Network infrastructure, VPN support, Web server, File server, Print server, FTP server, Groupware, VoIP server, Virtual Machines management and lot more.