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 needed. Is there an established distribution of linux or other free *nix that can provide the network services needed in a company and provide also a web interface for some of the configuration, logs etc much like the above mentioned aXsGUARD?
One mandatory feature, needed in most of the companies, is Multiple Internet Gateways. If there is not available this kind of distribution with Web interface, what would be the next best free solution in the sense of having both an interface and the shell just for advanced users.