Is there a free linux distribution that provides network services with an Web interface?

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http://serverfault.com – What I have in mind and used is a commercial gateway/firewall with an web-interface for configuration that has this specifications: Administration Network Monitoring and logging Authentication Firewall IPS and iDS VPN server Multiple internet gateways Bandwidth management Public dns Application firewall SSL-VPN webportal High availability Content scanning: web traffic Content scanning: mail traffic Statistics But the software comes only at cost embedded on their devices. What I found as a free alternative on internet is ZeroShell but is still beta and might not have some features need (HowTos)