Access and security will become fundamentally important as this growth continues. What The Experts Say Before widespread commercial use of the Internet, security issues were not paramount. Priority was given to ease of access and interconnectivity between different platforms. Today, however, security is a vital issue, and both private and public servers on the Internet are under threat. The traditional security method available for Internet servers is the firewall.
Firewalls provide an excellent solution to unauthorized access from unknown sources.
However, research has shown the majority of security threats originate from authorized users already beyond the protection provided by conventional firewall technology. Clearly, additional methods are needed to address all security threats, both external and internal. Access Control UNIX Discretionary Access Control uses a permission bit model based on the traditional classifications of file owner, member of the owning group, or others. This model does not scale well to support concerns with multiple users or groups. Mandatory Access Control protects the information rather than the object which contains it.