ClearOS is used for Network, Server and Gateway systems in a Linux distribution. It delivers a powerful IT solution - a completely web-based user interface.the features of clearOS Stateful firewall (iptables), networking and security,Intrusion detion and prevention system,Virtual private networking,Supports Squid, DansGuardian, MultiWAN, Provides E-mail services like webmail, Postfix, SMTP, POP3/s, IMAP/s, Easy to deploy LAMP,File and print services,Built-in reports for system statistics and other services.